MAX3096EEE+ - MAXIM INTEGRATED PRODUCTS

________________General Description

The MAX3095/MAX3096 are rugged, low-power, quad,

RS-422/RS-485 receivers with electrostatic discharge

(ESD) protection for use in harsh environments. All

receiver inputs are protected to ±15kV using IEC 1000-

4-2 Air-Gap Discharge, ±8kV using IEC 1000-4-2 Contact

Discharge, and ±15kV using the Human Body Model.

The MAX3095 operates from a +5V supply, while the

MAX3096 operates from a +3.3V supply. Receiver prop-

agation delays are guaranteed to within ±8ns of a pre-

determined value, thereby ensuring device-to-device

matching across production lots.

Complementary enable inputs can be used to place the

devices in a 1nA low-power shutdown mode in which

the receiver outputs are high impedance. When active,

these receivers have a fail-safe feature that guarantees

a logic-high output if the input is open circuit. They also

feature a quarter-unit-load input impedance that allows

128 receivers on a bus.

The MAX3095/MAX3096 are pin-compatible, low-power

upgrades to the industry-standard ’26LS32. They are

available in a space-saving QSOP package.

________________________Applications

Telecommunications Equipment

Rugged RS-422/RS-485/RS-423 Bus Receiver

Receivers for ESD-Sensitive Applications

Level Translators

____________________________Features

♦♦ESD Protection:

±15kV—IEC 1000-4-2, Air-Gap Discharge

±8kV—IEC 1000-4-2, Contact Discharge

±15kV—Human Body Model

♦♦Guaranteed Propagation-Delay Tolerance

Between All ICs:

±8ns (MAX3095)

±10ns (MAX3096)

♦♦Single +3V Operation (MAX3096)

Single +5V Operation (MAX3095)

♦♦16-Pin QSOP (8-pin SO footprint)

♦♦10Mbps Data Rate

♦♦Allow up to 128 Receivers on the Bus

♦♦1nA Low-Power Shutdown Mode

♦♦2.4mA Operating Supply Current

♦♦Pin-Compatible Upgrades to ’26LS32

MAX3095/MAX3096

±15kV ESD-Protected, 10Mbps, 3V/5V,

Quad RS-422/RS-485 Receivers

________________________________________________________________

Maxim Integrated Products

B1 VCC

TOP VIEW

MAX3095

MAX3096

DIP/SO/QSOP

GND

Pin Configuration

MAX3095

MAX3096

VCC

GND

________________Functional Diagram

19-0498; Rev 3; 1/10

PART

MAX3095CPE+

MAX3095CSE+

MAX3095CEE+ 0°C to +70°C

0°C to +70°C

TEMP. RANGE PIN-PACKAGE

16 Plastic DIP

16 Narrow SO

16 QSOP

_______________Ordering Information

MAX3095EPE+

MAX3095ESE+

MAX3095EEE+ -40°C to +85°C

-40°C to +85°C

-40°C to +85°C 16 Plastic DIP

16 Narrow SO

16 QSOP

MAX3096CPE+

MAX3096CSE+

MAX3096CEE+ 0°C to +70°C

0°C to +70°C

0°C to +70°C 16 Plastic DIP

16 Narrow SO

16 QSOP

MAX3096EPE+

MAX3096ESE+

MAX3096EEE+ -40°C to +85°C

-40°C to +85°C

-40°C to +85°C 16 Plastic DIP

16 Narrow SO

16 QSOP

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

Denotes a lead(Pb)-free/RoHS-compliant package.

MAX3095/MAX3096

±15kV ESD-Protected, 10Mbps, 3V/5V,

Quad RS-422/RS-485 Receivers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS—MAX3095

(VCC = 5V ±5%, TA= TMIN to TMAX, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

Supply Voltage (VCC)...............................................................7V

Control Input Voltage (G, G).......................-0.3V to (VCC + 0.3V)

Receiver Input Voltage (A_, B_)...........................................±25V

Receiver Output Voltage (Y_).....................-0.3V to (VCC + 0.3V)

Continuous Power Dissipation (TA= +70°C)

16-Pin Plastic DIP (derate 10.5mW/°C above +70°C) .762mW

16-Pin SO (derate 8.7mW/°C above +70°C)................696mW

16-Pin QSOP (derate 8.3mW/°C above +70°C)...........667mW

Operating Temperature Ranges

MAX309_C_ _ .....................................................0°C to +70°C

MAX309_E_ _...................................................-40°C to +85°C

Storage Temperature Range .............................-65°C to +160°C

Lead Temperature (soldering, 10s) .................................+300°C

VCM = 0V

IEC 1000-4-2 (Contact Discharge)

-7V ≤VCM ≤12V

IEC 1000-4-2 (Air-Gap Discharge)

Human Body Model

-7V ≤VCM ≤12V

0 ≤VOUT ≤VCC, G = VCC or G= GND

0 ≤VOUT ≤VCC, G = GND and G= VCC

IOUT = 4mA, VID = -200mV,

G = VCC or G= GND, Figure 1

G = GND and G= VCC

IOUT = -4mA, VID = 200mV,

G = VCC or G= GND, Figure 1

No load, G = VCC or G= GND

CONDITIONS

±8

±15 kV

±15

ESD Protection

(Note 2)

µA0.001 10

mA2.4 3.5

ICC

Supply Current

mV45

mV-200 200VTH

Receiver Differential Input

Threshold

Receiver Input Hysteresis

kΩ48RIN

Receiver Input Resistance

mA±7 ±75IOSR

Output Short-Circuit Current

µA±1IOZR

Three-State Current at Receiver

Output

V0.4VOL

Receiver Output Low Voltage

µA±1

Enable Input Current (G, G)

V2.0VIH

Enable Input High Voltage (G, G)

V0.8VIL

Enable Input Low Voltage (G, G)

VVCC - 1.5VOH

Receiver Output High Voltage

UNITSMIN TYP MAXSYMBOLPARAMETER

µA

250

IIN

Receiver Input Current (A_, B_) VCC = 0V or 5.25V VIN = 12V

-200VIN = -7V

MAX3095/MAX3096

±15kV ESD-Protected, 10Mbps, 3V/5V,

Quad RS-422/RS-485 Receivers

_______________________________________________________________________________________ 3

DC ELECTRICAL CHARACTERISTICS—MAX3096

(VCC = 3.135V to 3.6V, TA= TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 3.3V, TA= +25°C.) (Note 1)

SWITCHING CHARACTERISTICS—MAX3095

(VCC = 5V ±5%, TA= TMIN to TMAX, unless otherwise noted. Typical values are at TA= +25°C.)

VCC = 5V ±5%, TA= TMIN to TMAX

Figure 3

|VID|= 3V, Figure 2, matched conditions

|VID|= 3V,

Figure 2

Figure 3

CONDITIONS

Mbps10fMAX

Maximum Data Rate

ns60 100tHZ

Output Disable Time from

High Level

ns60 100tLZ

Output Disable Time from

Low Level

78 86 94

65 98

tPLH, tPHL

Input-to-Output Propagation

Delay

ns600 800tZH

Output Enable Time to

High Level

ns600 800tZL

Output Enable Time to

Low Level

ns16

Device-to-Device Propagation-

Delay Matching

68 76 84

71 79 87

65 73 81

82 90 98

74 82 90

UNITSMIN TYP MAXSYMBOLPARAMETER

VCM = 0V

-7V ≤VCM ≤12V

0 ≤VOUT ≤VCC, G = VCC or G= GND

0 ≤VOUT ≤VCC, G = GND and G= VCC

IOUT = 2.5mA, VID = -200mV,

G = VCC or G= GND, Figure 1

IOUT = -1.5mA, VID = 200mV,

G = VCC or G= GND, Figure 1

CONDITIONS

mV45

mV-200 200VTH

Receiver Differential Input

Threshold

Receiver Input Hysteresis

kΩ48RIN

Receiver Input Resistance

mA±4 ±60IOSR

Output Short-Circuit Current

µA±1IOZR

Three-State Current at Receiver

Output

V0.4VOL

Receiver Output Low Voltage

µA±1

Enable Input Current (G, G)

V2.0VIH

Enable Input High Voltage (G, G)

V0.8VIL

Enable Input Low Voltage (G, G)

VVCC - 0.4VOH

Receiver Output High Voltage

UNITSMIN TYP MAXSYMBOLPARAMETER

µA

250

IIN

Receiver Input Current (A_, B_) VCC = 0V or 3.6V VIN = 12V

-200VIN = -7V

ns-4 ±10tSK

Propagation-Delay Skew

(tPLH - tPHL)

TA= +85°C

TA= +25°C

TA= -40°C

TA= +85°C

TA= +25°C

TA= -40°C

VCC = 5.25V

VCC = 4.75V

MAX3095/MAX3096

±15kV ESD-Protected, 10Mbps, 3V/5V,

Quad RS-422/RS-485 Receivers

4 _______________________________________________________________________________________

IEC 1000-4-2 (Contact Discharge)

IEC 1000-4-2 (Air-Gap Discharge)

Human Body Model

G = GND and G= VCC

No load, G = VCC or G= GND

CONDITIONS

±8

±15 kV

±15

ESD Protection

(Note 2)

µA0.001 10

mA2.4 4.0

ICC

Supply Current

UNITSMIN TYP MAXSYMBOLPARAMETER

DC ELECTRICAL CHARACTERISTICS—MAX3096 (continued)

(VCC = 3.135V to 3.6V, TA= TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 3.3V, TA= +25°C.) (Note 1)

|VID|= 3V,

Figure 2

VCC = 3.135V to 3.6V, TA= TMIN to TMAX

Figure 3

|VID|= 3V, Figure 2, matched conditions

Figure 3

CONDITIONS

Mbps10fMAX

Maximum Data Rate

ns80 180tHZ

Output Disable Time from

High Level

ns80 180tLZ

Output Disable Time from

Low Level

88 98 112

69 127

tPLH, tPHL

Input-to-Output Propagation

Delay

ns600 1000tZH

Output Enable Time to

High Level

ns600 1000tZL

Output Enable Time to

Low Level

ns24

Device-to-Device Propagation-

Delay Matching

82 92 106

78 88 102

69 79 93

103 113 127

91 101 115

UNITSMIN TYP MAXSYMBOLPARAMETER

SWITCHING CHARACTERISTICS—MAX3096

(VCC = 3.135V to 3.6V, TA= TMIN to TMAX, unless otherwise noted. Typical values are at TA= +25°C.)

Note 1: All currents into the device are positive; all currents out of the device are negative. All voltages are referred to device

ground, unless otherwise noted.

Note 2: Receiver inputs (A_, B_).

ns-2 ±10tSK

Propagation-Delay Skew

(tPLH - tPHL)

TA= +85°C

TA= +25°C

TA= -40°C

TA= +85°C

TA= +25°C

TA= -40°C

VCC = 3.60V

VCC = 3.135V

MAX3095/MAX3096

±15kV ESD-Protected, 10Mbps, 3V/5V,

Quad RS-422/RS-485 Receivers

_______________________________________________________________________________________

-10

-20

-30

-40

-50

021 345

OUTPUT CURRENT vs.

OUTPUT LOW VOLTAGE

MAX3095-01

OUTPUT LOW VOLTAGE (V)

OUTPUT CURRENT (mA)

MAX3095

MAX3096

021 345

OUTPUT CURRENT vs.

OUTPUT HIGH VOLTAGE

MAX3095-02

OUTPUT HIGH VOLTAGE (V)

OUTPUT CURRENT (mA)

MAX3095

MAX3096

0.3

0.2

0.1

0.4

0.5

0.6

0.7

0.8

0.9

1.0

-40 10-15 35 60 85

OUTPUT LOW VOLTAGE

vs. TEMPERATURE

MAX3095-03

TEMPERATURE (°C)

OUTPUT LOW VOLTAGE (V)

MAX3095

MAX3096

IOUT = 8mA

-40 10-15 35 60 85

OUTPUT HIGH VOLTAGE

vs. TEMPERATURE

MAX3095-04

TEMPERATURE (°C)

OUTPUT HIGH VOLTAGE (V)

MAX3095

MAX3096

IOUT = -8mA

100

110

120

-40 10-15 35 60 85

MAX3095

PROPAGATION DELAY vs. TEMPERATURE

MAX3095-07

TEMPERATURE (°C)

PROPAGATION DELAY (ns)

⏐VID⏐ = 3V

CL = 15pF

2.0

2.2

2.6

2.4

2.8

3.0

-40 10-15 35 60 85

SUPPLY CURRENT vs. TEMPERATURE

MAX3095-05

TEMPERATURE (°C)

SUPPLY CURRENT (mA)

MAX3095/MAX3096

-40 10-15 35 60 85

SHUTDOWN SUPPLY CURRENT

vs. TEMPERATURE

MAX3095-06

TEMPERATURE (°C)

SHUTDOWN SUPPLY CURRENT (nA)

MAX3095

MAX3096

110

100

120

130

140

-40 10-15 35 60 85

MAX3096

PROPAGATION DELAY vs. TEMPERATURE

MAX3095-08

TEMPERATURE (°C)

PROPAGATION DELAY (ns)

⏐VID⏐ = 3V

CL = 15pF

Typical Operating Characteristics

(VCC = 5V for MAX3095, VCC = 3.3V for MAX3096, TA= +25°C, unless otherwise noted.)

MAX3095/MAX3096

±15kV ESD-Protected, 10Mbps, 3V/5V,

Quad RS-422/RS-485 Receivers

6 _______________________________________________________________________________________

_Pin Description

NAME FUNCTION

1B1 Inverting Receiver Input

2A1 Noninverting Receiver Input

3Y1

Receiver Output. Enabled when G = high OR G= low. Y1 is logic-high if VA1 > VB1 by 200mV, and low if

VA1 < VB1 by 200mV. Y1 is logic-high if VA1 and VB1 remain unconnected. Otherwise, the state is undeter-

mined. Y1 goes high impedance when the G = low

and

G= high.

4 G Active-High Receiver Output Enable. A logic-high on this input enables all receivers. When taken low and G

is high, all receivers are shut down, and the outputs go high impedance.

8GND Ground

7B2 Inverting Receiver Input

6A2 Noninverting Receiver Input

5Y2 Receiver Output. Same functionality as Y1.

13 Y4 Receiver Output. Same functionality as Y1.

12 GActive-Low Receiver Output Enable. A logic-low on this input enables all receivers. When G= high and G =

low, all receivers are shut down, and the outputs go high impedance.

11 Y3 Receiver Output. Same functionality as Y1.

10 A3 Noninverting Receiver Input

9B3 Inverting Receiver Input

TIME (200ns/div)

SHUTDOWN TIMING

MAX3095 TOC09

MAX3095

Y VOLTAGE

5V/div

2V/div

MAX3096

Y VOLTAGE

G VOLTAGE

CIRCUIT OF FIGURE 3,

S1 OPEN, S2 CLOSED, S3 = 1V

Typical Operating Characteristics (continued)

(VCC = 5V for MAX3095, VCC = 3.3V for MAX3096, TA= +25°C, unless otherwise noted.)

14 A4 Noninverting Receiver Input

15 B4 Inverting Receiver Input

16 VCC Positive Supply

MAX3095/MAX3096

±15kV ESD-Protected, 10Mbps, 3V/5V,

Quad RS-422/RS-485 Receivers

_______________________________________________________________________________________ 7

VOH IOH

(-)

IOL

(+)

VOL

VID

tPLH

1.5V

OUT

IN 1.5V

3.0V

tPHL

VCC

1.5V 1.5V

VID

15pF

ROUT

G = VCC or G = GND

|VID| = 3V

(MAX3096)

(MAX3095)

2.0V 2.0V

(MAX3096)

(MAX3095)

Figure 2. Receiver Propagation Delay

Figure 1. Receiver VOH and VOL

VOH

1.5V

OUT 0.25V

G1.5V1.5V

S1 OPEN

S2 CLOSED

S3 = 1V

tHZ

1.5V

tZL

tZH

VCC

VOL

0.25V

OUT

S1 CLOSED

S2 OPEN

S3 = -1V

tLZ

15pF

+1V

-1V

VCC

VID

VCC

Figure 3. Receiver Enable and Disable Times

_______________Detailed Description

±15kV ESD Protection

As with all Maxim devices, ESD-protection structures

are incorporated on all pins to protect against electro-

static discharges (ESD) encountered during handling

and assembly. The MAX3095/MAX3096 receiver inputs

have extra protection against static electricity found in

normal operation. Maxim’s engineers developed state-

of-the-art structures to protect these pins against ±15kV

ESD, without damage. After an ESD event, the MAX3095/

MAX3096 continue working without latchup.

ESD protection can be tested in several ways. The

receiver inputs are characterized for protection to the

following:

1) ±15kV using the Human Body Model

2) ±8kV using the Contact-Discharge Method specified

in IEC 1000-4-2 (formerly IEC 801-2)

3) ±15kV using the Air-Gap Method specified in

IEC 1000-4-2 (formerly IEC 801-2)

ESD Test Conditions

ESD performance depends on a number of conditions.

Contact Maxim for a reliability report that documents

test setup, methodology, and results.

Human Body Model

Figure 4a shows the Human Body Model, and Figure

4b shows the current waveform it generates when dis-

charged into a low impedance. This model consists of a

100pF capacitor charged to the ESD voltage of interest,

which is then discharged into the device through a

1.5kΩresistor.

IEC 1000-4-2

Since January 1996, all equipment manufactured and/or

sold in the European community has been required to

meet the stringent IEC 1000-4-2 specification. The IEC

1000-4-2 standard covers ESD testing and performance

of finished equipment; it does not specifically refer to inte-

grated circuits. The MAX3095/MAX3096 help you design

equipment that meets Level 4 (the highest level) of IEC

1000-4-2, without additional ESD-protection components.

The main difference between tests done using the

Human Body Model and IEC 1000-4-2 is higher peak

current in IEC 1000-4-2. Because series resistance is

lower in the IEC 1000-4-2 ESD test model (Figure 5a), the

ESD-withstand voltage measured to this standard is gen-

erally lower than that measured using the Human Body

Model. Figure 5b shows the current waveform for the

±8kV IEC 1000-4-2 Level 4 ESD Contact-Discharge test.

The Air-Gap test involves approaching the device with a

charge probe. The Contact-Discharge method connects

the probe to the device before the probe is energized.

Machine Model

The Machine Model for ESD testing uses a 200pF stor-

age capacitor and zero-discharge resistance. It mimics

the stress caused by handling during manufacturing

and assembly. Of course, all pins (not just RS-485

inputs) require this protection during manufacturing.

Therefore, the Machine Model is less relevant to the I/O

ports than are the Human Body Model and IEC 1000-4-2.

Low-Power Shutdown Mode

Table 1 shows the functionality of the enable inputs.

The MAX3095/MAX3096 enter shutdown when G is low

and Gis high. In shutdown, all outputs go high imped-

ance and the devices typically draw less than 1nA. The

devices exit shutdown by taking G high or Glow. The

typical shutdown exit time is 600ns.

MAX3095/MAX3096

±15kV ESD-Protected, 10Mbps, 3V/5V,

Quad RS-422/RS-485 Receivers

Table 1. Function Table

OUTPUT

DEVICE

MODE

GG(A - B)

1 X ≥200mV 1On

1 X ≤-200mV 0

1 X Open 1On

X 0 ≥200mV 1On

X 0 ≤-200mV 0On

X 0 Open 1On

0 1 X High-Z Shutdown

X = don’t care, High-Z = high impedance

8 _______________________________________________________________________________________

MAX3095/MAX3096

±15kV ESD-Protected, 10Mbps, 3V/5V,

Quad RS-422/RS-485 Receivers

_______________________________________________________________________________________ 9

CHARGE-CURRENT

LIMIT RESISTOR

DISCHARGE

RESISTANCE

STORAGE

CAPACITOR

150pF

50M to 100M

330Ω

HIGH-

VOLTAGE

SOURCE

DEVICE

UNDER

TEST

tr = 0.7ns to 1ns 30ns

60ns

100%

90%

10%

PEAK

Figure 5a. IEC 1000-4-2 ESD Test Model Figure 5b. IEC 1000-4-2 ESD-Generator Current Waveform

Figure 4b. Human Body Model Current Waveform

IP 100%

90%

36.8%

tRL TIME

tDL

CURRENT WAVEFORM

PEAK-TO-PEAK RINGING

(NOT DRAWN TO SCALE)

10%

AMPERES

CHARGE-CURRENT

LIMIT RESISTOR

DISCHARGE

RESISTANCE

STORAGE

CAPACITOR

100pF

1.5k

HIGH-

VOLTAGE

SOURCE

DEVICE

UNDER

TEST

Figure 4a. Human Body ESD Test Model

Applications Information

Propagation-Delay Matching

The MAX3095/MAX3096 exhibit propagation delays that

are closely matched from one device to another, even

between devices from different production lots. This fea-

ture allows multiple data lines to receive data and clock

signals with minimal skewing with respect to each other.

The MAX3095 receiver propagation delays are trimmed

to a predetermined value ±8ns, while the MAX3096

delays are trimmed to a predetermined value ±10ns.

128 Receivers on the Bus

The standard RS-485 input impedance is 12kΩ(one-

unit load). The standard RS-485 transmitter can drive

32 unit loads. The MAX3095/MAX3096 present a 1/4-

unit-load input impedance (48kΩ), which allows up to

128 receivers on a bus. Any combination of these RS-

485 receivers with a total of 32 unit loads can be con-

nected to the same bus.

Fail-Safe Implementation

The MAX3095/MAX3096 receiver inputs guarantee a

logic high output when the inputs are open circuit (no

termination resistor used). This occurs when the trans-

mitter is removed from the bus or when all transmitter

outputs are high impedance. However, when the line is

terminated and the transmitters are disabled, the differ-

ential voltage between the A and B inputs falls below

the ±200mV RS-485 sensitivity threshold. Consequent-

ly, the outputs become undefined. To maintain a fail-

safe receiver output while using a terminating resistor,

input A must be biased at least 200mV above input B.

The resistor-divider network shown in Figure 6 is rec-

ommended.

Chip Information

PROCESS: BiCMOS

Package Information

For the latest package outline information and land patterns,

go to www.maxim-ic.com/packages. Note that a “+”, “#”, or

“-” in the package code indicates RoHS status only. Package

drawings may show a different suffix character, but the drawing

pertains to the package regardless of RoHS status.

MAX3095/MAX3096

±15kV ESD-Protected, 10Mbps, 3V/5V,

Quad RS-422/RS-485 Receivers

10 ______________________________________________________________________________________

150Ω

MAX3095

MAX3096

VCC

Figure 6. External Fail-Safe Implementation

PACKAGE TYPE PACKAGE CODE DOCUMENT NO.

16 QSOP E16+5 21-0055

16 Narrow SO S16+5 21-0041

16 PDIP P16+1 21-0043

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are

implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________

MAX3095/MAX3096

±15kV ESD-Protected, 10Mbps, 3V/5V,

Quad RS-422/RS-485 Receivers

Revision History

REVISION

NUMBER

REVISION

DATE DESCRIPTION PAGES

CHANGED

2 1/10

•Changed the lower specification in the VCC range from 3.0V to 3.135V.

•Updated the MAX specifications for the “Input-to-Output Propagation Delay” in the

Switching Characteristics—MAX3096 table.

3, 4

3 1/10

•Updated all the parts in the Ordering Information to be lead-free.

•Updated the Y1 description in the Pin Description.

•Changed the Chip Information section to “PROCESS: BiCMOS”.

1, 6, 10