74HC/HCT368 MSI HEX BUFFER/LINE DRIVER; 3-STATE; INVERTING FEATURES TYPICAL @ tnverting outputs SYMBOL PARAMETER CONDITIONS UNIT @ Output capability: bus driver [ | i AC HCT ! e | : 1 Cc category: MSI tepHL/ propagation delay CL = 15 pF | g i" ns tPLH ; aAtony i Vecr5v GENERAL DESCRIPTION 7 Cc input capacitance : 3.5 | 3.5 | pF The 74HC/HCT368 are high-speed Si-gate CMOS devices and are pin ' power dissipation i compatible with low power Schottky Ceo nates 1 and 2 30 | 40 | pF TTL (LSTTL}. They are specified in compliance with JEDEC standard no. 7A. The 74HC/HCT 368 are hex inverting buffer/line drivers with 3-state outputs. The 3-state outputs (nY} are controlled by the output enable inputs (108, 20E). A HIGH on nOE causes the outputs to assume a high impedance OF F-state. The ''368"' is identical to the 367 but has inverting outputs. capacitance per buffer GND = 0 V: Tamb = 25 C; ty = tp = 6 ns Notes 1. Cpo is used to determine the dynamic power dissipation (Pp in #W): Po =Cpp x Vcc? x fi + 5 (CL x VCC? x fo) where: fj = input frequency in MHz fo = output frequency in MHz Z (CL x Vcc? x fo) = sum of outputs CL = Vcc = 2. For HC the condition is Vj = GND to Vcc For HCT the condition is Vj = GND to Vcc 1.5 V PACKAGE OUTLINES SEE PACKAGE INFORMATION SECTION PIN DESCRIPTION output load capacitance in pF supply voltage in V PIN NO. SYMBOL NAME AND FUNCTION 1,15 10E, 20E output enable inputs (active LOW) a 6. 10, 12, 1A to 6A data inputs 2.5 79,11, 1 10 BY data outputs 8 GNO ground (0 V} 16 Veco positive supply voltage 1e | U 6] Voc a] ps 1 [3 ia} aa = eb 7G] 368 [iz] 5a sae] [it] s +O] So evo [a | 9} 7293875 Fig. 1 Pin configuration. 7293866 Fig. 2 Lagic symbol. ght B13 7293679 Fig. 3 IEC logic symbol, December 1990 61574HC/HCT368 MSI FUNCTION TABLE INPUTS OUTPUTS nOE nA n L L H L H L H x Zz H = HIGH voltage level L = LOW voltage level X= don't care Z = high impedance OF F-state 7291667 Fig. 4 Functional diagram. ONE QUFFER/LINE DRIVER Voc bear pol v 10 4 GND x L2 qa [3 Lav se boo oo oO oe 260 [ey Ga 6F SIX IDENTICAL CIACUITS 7299886 Fig. Logic diagram. 616 January 1986Hex buffer/line driver; 3-state; inverting 74HC/HCT368 MSI DC CHARACTERISTICS FOR 74HC For the OC characteristics see chapter HCMOS family characteristics, section Family specifications. Output capability: bus driver 'cc category: MSI AC CHARACTERISTICS FOR 74HC GND = 0 V; t, = te = 6 ns; CL = 50 pF Tamb (C) TEST CONDITIONS 74HC SYMBOL | PARAMETER UNIT! Veco | WAVEFORMS | +25 40 to +85 | 40 to +125 v | imin. | typ.) max. | min. | max. | min. | max. i . 30 | 95 120 145 2.0 tPHL/ | propagation delay 1 | 19 24 29 ns | 45 | Fig.6 LH; NA tony 9 | 16 20 25 6.0 ; 41 | 150 190 225 2.0 tezZH/ 3-state output enable time 1s | 30 38 45 ns 45 | Fig? tPZL nOE to nY 12 | 26 33 38 6.0 . . 55 | 150 190 225 2.0 teH2/ 3-state output disable time 20 | 30 38 45 ns 45 | Fig? tPLZ nOE to n 16 | 26 33 38 6.0 14 | 60 75 90 2.0 : THU output transition time 5 12 15 18 ns 4.5 | Fig. 6 'TLH 4 | 10 13 15 6.0 DC CHARACTERISTICS FOR 74HCT For the DC characteristics see chapter 'HCMOS family characteristics, sectian Family specifications. Output capability: bus driver Icc category: MS! Note to HCT types The value of additional quiescent supply current (Alcc) for a unit load of 1 is given in the family specifications. To determine Alcc per input, multiply this value by the unit load coefficient shawn in the table below. UNIT LOAD INPUT COEFFICIENT 10E 1.00 20 0.90 nA 1.00 January 1986 61774HC/HCT368 MSI AC CHARACTERISTICS FOR 74HCT GND = OV; t, = t = 6 ns; CL = 50 pF Tamb (C) TEST CONDITIONS 74HCT SYMBOL | PARAMETER UNIT} Veco | WAVEFORMS +25 40 to +85 | 40 to +125 v min. | typ. | max. | min. | max. | min. | max. tPHL/ propagation delay . PLH nA to n 13 24 30 36 ns 45 | Fig. 6 tpZH/ 3-state output enable time . pz. nOE to n 17 35 44 53 ns 45 \ Fig. 7 : . | tpH2/ 3-state output disable time . tpLz nOE to ny 20 | 35 44 53 ns 4.5 | Fig.7 t tra output transition time 5 12 15 18 ns 4.5 | Fig.6 AC WAVEFORMS nA INPUT OUTPUT LOW. ta-OFF OFF -to- LOW a OUTPUT ourTPuT HIGH -to- OFF OFF -10-HIGH 7793689 outputs LS Outputs |. outputs 7z0I0a8 enabled disabled enabled Fig. 6 Waveforms showing the input (nA) Fig. 7 Waveforms showing the 3-state enable to output (NY) propagation delays and and disable times. the output transition times. Note to AC waveforms (1} HC; Vy = 50%: Vj = GND to Voc. HCT: Vy =1.3V;V) = GND to3V. 618 January 1986