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| INTEGRATED CIRCUITS DATA SHEET For a complete data sheet, please also download: * The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications * The IC06 74HC/HCT/HCU/HCMOS Logic Package Information * The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines 74HC/HCT75 Quad bistable transparent latch Product specification File under Integrated Circuits, IC06 December 1990 Philips Semiconductors Product specification Quad bistable transparent latch FEATURES * Complementary Q and Q outputs * VCC and GND on the centre pins * Output capability: standard * ICC category: MSI GENERAL DESCRIPTION The 74HC/HCT75 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. 74HC/HCT75 The 74HC/HCT75 have four bistable latches. The two latches are simultaneously controlled by one of two active HIGH enable inputs (LE1-2 and LE3-4). When LEn-n is HIGH, the data enters the latches and appears at the nQ outputs. The nQ outputs follow the data inputs (nD) as long as LEn-n is HIGH (transparent). The data on the nD inputs one set-up time prior to the HIGH-to-LOW transition of the LEn-n will be stored in the latches. The latched outputs remain stable as long as the LEn-n is LOW. QUICK REFERENCE DATA GND = 0 V; Tamb = 25 C; tr = tf = 6 ns TYPICAL SYMBOL tPHL/ tPLH PARAMETER propagation delay nD to nQ, nQ LEn-n to nQ, nQ CI CPD Notes 1. CPD is used to determine the dynamic power dissipation (PD in W): PD = CPD x VCC2 x fi + (CL x VCC2 x fo) where: fi = input frequency in MHz fo = output frequency in MHz (CL x VCC2 x fo) = sum of outputs CL = output load capacitance in pF VCC = supply voltage in V 2. For HC the condition is VI = GND to VCC For HCT the condition is VI = GND to VCC -1.5 V ORDERING INFORMATION See "74HC/HCT/HCU/HCMOS Logic Package Information". input capacitance power dissipation capacitance per latch notes 1 and 2 CONDITIONS HC CL = 15 pF; VCC = 5 V 11 11 3.5 42 12 11 3.5 42 ns ns pF pF HCT UNIT December 1990 2 Philips Semiconductors Product specification Quad bistable transparent latch PIN DESCRIPTION PIN NO. 1, 14, 11, 8 2, 3, 6, 7 4 5 12 13 16, 15, 10, 9 SYMBOL 1Q to 4Q 1D to 4D LE3-4 VCC GND LE1-2 1Q to 4Q NAME AND FUNCTION complementary latch outputs data inputs latch enable input, latches 3 and 4 (active HIGH) positive supply voltage ground (0 V) latch enable input, latches 1 and 2 (active HIGH) latch outputs 74HC/HCT75 Fig.1 Pin configuration. Fig.2 Logic symbol. Fig.3 IEC logic symbol. December 1990 3 Philips Semiconductors Product specification Quad bistable transparent latch FUNCTION TABLE OPERATING MODES data enabled data latched Notes 1. H = HIGH voltage level L = LOW voltage level q = lower case letters indicate the state of the referenced output one set-up time prior to the HIGH-to-LOW LEn-n transition X = don't care H H L INPUTS LEn-n L H X nD OUTPUTS nQ L H q H L q nQ 74HC/HCT75 Fig.4 Functional diagram. Fig.5 Logic diagram. December 1990 4 Philips Semiconductors Product specification Quad bistable transparent latch DC CHARACTERISTICS FOR 74HC For the DC characteristics see "74HC/HCT/HCU/HCMOS Logic Family Specifications". Output capability: standard ICC category: MSI AC CHARACTERISTICS FOR 74HC GND = 0 V; tr = tf = 6 ns; CL = 50 pF Tamb (C) 74HC SYMBOL PARAMETER +25 -40 to+85 -40 to+125 max. 165 33 28 180 36 31 180 36 31 190 38 32 110 22 19 120 24 20 90 18 15 3 3 3 ns 74HC/HCT75 TEST CONDITIONS UNIT V CC (V) 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 WAVEFORMS min. typ. max. min. max. min. tPHL/ tPLH propagation delay nD to nQ propagation delay nD to nQ propagation delay LEn-n to nQ propagation delay LEn-n to nQ output transition time 33 12 10 39 14 11 33 12 10 39 14 11 19 7 6 80 16 14 60 12 10 3 3 3 17 6 5 14 5 4 -8 -3 -2 110 22 19 120 24 20 120 24 20 125 25 21 75 15 13 100 20 17 75 15 13 3 3 3 140 28 24 150 30 26 150 30 26 155 31 26 95 19 16 Fig.6 tPHL/ tPLH ns Fig.7 tPHL/ tPLH ns Fig.8 tPHL/ tPLH ns Fig.8 tTHL/ tTLH ns Figs 6 and 7 tW enable pulse width HIGH set-up time nD to LEn-n hold time nD to LEn-n ns Fig.8 tsu ns Fig.9 th ns Fig.9 December 1990 5 Philips Semiconductors Product specification Quad bistable transparent latch DC CHARACTERISTICS FOR 74HCT For the DC characteristics see "74HC/HCT/HCU/HCMOS Logic Family Specifications". Output capability: standard ICC category: MSI Note to HCT types 74HC/HCT75 The value of additional quiescent supply current (ICC) for a unit load of 1 is given in the family specifications. To determine ICC per input, multiply this value by the unit load coefficient shown in the table below. INPUT nD LEn-n UNIT LOAD COEFFICIENT 0.75 1.00 AC CHARACTERISTICS FOR 74HCT GND = 0 V; tr = tf = 6 ns; CL = 50 pF Tamb (C) 74HCT SYMBOL PARAMETER +25 -40 to +85 -40 to +125 max. 42 42 42 45 22 24 18 3 ns ns ns ns ns ns ns ns 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 Fig.6 Fig.7 Fig.8 Fig.8 Figs 6 and 7 Fig.8 Fig.9 Fig.9 UNIT V CC (V) WAVEFORMS TEST CONDITIONS min. typ. max. min. max. min. tPHL/ tPLH tPHL/ tPLH tPHL/ tPLH tPHL/ tPLH tTHL/ tTLH tW tsu th propagation delay nD to nQ propagation delay nD to nQ propagation delay LEn-n to nQ propagation delay LEn-n to nQ output transition time enable pulse width HIGH set-up time nD to LEn-n hold time nD to LEn-n 16 12 3 15 15 13 15 7 4 4 -2 28 28 28 30 15 20 15 3 35 35 35 38 19 December 1990 6 Philips Semiconductors Product specification Quad bistable transparent latch AC WAVEFORMS 74HC/HCT75 (1) HC : VM = 50%; VI = GND to VCC. HCT: VM = 1.3 V; VI = GND to 3 V. (1) HC : VM = 50%; VI = GND to VCC. HCT: VM = 1.3 V; VI = GND to 3 V. Fig.6 Waveforms showing the data input (nD) to output (nQ) propagation delays and the output transition times. Fig.7 Waveforms showing the data input (nD) to output (nQ) propagation delays and the output transition times. The shaded areas indicate when the input is permitted to change for predictable output performance. (1) HC : VM = 50%; VI = GND to VCC. HCT: VM = 1.3 V; VI = GND to 3 V. (1) HC : VM = 50%; VI = GND to VCC. HCT: VM = 1.3 V; VI = GND to 3 V. Fig.9 Waveforms showing the data set-up and hold times for nD input to LEn-n input. Fig.8 Waveforms showing the latch enable input (LEn-n) pulse width, the latch enable input to outputs (nQ, nQ) propagation delays and the output transition times. PACKAGE OUTLINES See "74HC/HCT/HCU/HCMOS Logic Package Outlines". December 1990 7 |
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