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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/HCT374 Octal D-type flip-flop; positive edge-trigger; 3-state Product specification File under Integrated Circuits, IC06 December 1990 Philips Semiconductors Product specification Octal D-type flip-flop; positive edge-trigger; 3-state FEATURES * 3-state non-inverting outputs for bus oriented applications * 8-bit positive, edge-triggered register * Common 3-state output enable input * Independent register and 3-state buffer operation * Output capability: bus driver * ICC category: MSI GENERAL DESCRIPTION The 74HC/HCT374 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. QUICK REFERENCE DATA GND = 0 V; Tamb = 25 C; tr = tf = 6 ns 74HC/HCT374 The 74HC/HCT374 are octal D-type flip-flops featuring separate D-type inputs for each flip-flop and 3-state outputs for bus oriented applications. A clock (CP) and an output enable (OE) input are common to all flip-flops. The 8 flip-flops will store the state of their individual D-inputs that meet the set-up and hold times requirements on the LOW-to-HIGH CP transition. When OE is LOW, the contents of the 8 flip-flops are available at the outputs. When OE is HIGH, the outputs go to the high impedance OFF-state. Operation of the OE input does not affect the state of the flip-flops. The "374" is functionally identical to the "534", but has non-inverting outputs. TYPICAL SYMBOL tPHL/ tPLH fmax 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". PARAMETER propagation delay CP to Qn maximum clock frequency input capacitance power dissipation capacitance per flip-flop notes 1 and 2 CONDITIONS HC CL = 15 pF; VCC = 5 V 15 77 3.5 17 HCT 13 48 3.5 17 ns MHz pF pF UNIT December 1990 2 Philips Semiconductors Product specification Octal D-type flip-flop; positive edge-trigger; 3-state PIN DESCRIPTION PIN NO. 1 2, 5, 6, 9, 12, 15, 16, 19 3, 4, 7, 8, 13, 14, 17, 18 10 11 20 SYMBOL OE Q0 to Q7 D0 to D7 GND CP VCC NAME AND FUNCTION 74HC/HCT374 3-state output enable input (active LOW) 3-state flip-flop outputs data inputs ground (0 V) clock input (LOW-to-HIGH, edge-triggered) positive supply voltage Fig.1 Pin configuration. Fig.2 Logic symbol. Fig.3 IEC logic symbol. December 1990 3 Philips Semiconductors Product specification Octal D-type flip-flop; positive edge-trigger; 3-state FUNCTION TABLE OPERATING MODES load and read register load register and disable outputs Notes INPUTS OE L L H H CP Dn l h l h 74HC/HCT374 INTERNAL FLIP-FLOPS L H L H OUTPUTS Q0 to Q7 L H Z Z 1. H = HIGH voltage level h = HIGH voltage level one set-up time prior to the LOW-to-HIGH CP transition L = LOW voltage level I = LOW voltage level one set-up time prior to the LOW-to-HIGH CP transition Z = high impedance OFF-state = LOW-to-HIGH CP transition Fig.4 Functional diagram. Fig.5 Logic diagram. December 1990 4 Philips Semiconductors Product specification Octal D-type flip-flop; positive edge-trigger; 3-state DC CHARACTERISTICS FOR 74HC For the DC characteristics see "74HC/HCT/HCU/HCMOS Logic Family Specifications". Output capability: bus driver 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. 250 50 43 225 45 38 225 45 38 90 18 15 120 24 20 90 18 15 5 5 5 4.0 20 24 ns 74HC/HCT374 TEST CONDITIONS UNIT V WAVEFORMS 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 Fig.6 min. typ. max. min. max. min. tPHL/ tPLH propagation delay CP to Qn 3-state output enable time OE to Qn 3-state output disable time OE to Qn output transition time 50 18 14 41 15 12 50 18 14 14 5 4 80 16 14 60 12 10 5 5 5 6.0 30 35 19 7 6 14 5 4 -6 -2 -2 23 70 83 165 33 28 150 30 26 150 30 26 60 12 10 100 20 17 75 15 13 5 5 5 4.8 24 28 205 41 35 190 38 33 190 38 33 75 15 13 tPZH/ tPZL ns Fig.7 tPHZ/ tPLZ ns Fig.7 tTHL/ tTLH ns Fig.6 tW clock pulse width HIGH or LOW set-up time Dn to CP hold time Dn to CP maximum clock pulse frequency ns Fig.6 tsu ns Fig.8 th ns Fig.8 fmax MHz Fig.6 December 1990 5 Philips Semiconductors Product specification Octal D-type flip-flop; positive edge-trigger; 3-state DC CHARACTERISTICS FOR 74HCT For the DC characteristics see "74HC/HCT/HCU/HCMOS Logic Family Specifications". Output capability: bus driver ICC category: MSI Note to HCT types 74HC/HCT374 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 OE CP Dn UNIT LOAD COEFFICIENT 1.25 0.90 0.35 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. 48 45 42 18 29 18 5 17 ns ns ns ns ns ns ns MHz 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 Fig.6 Fig.7 Fig.7 Fig.6 Fig.6 Fig.8 Fig.8 Fig.6 UNIT V WAVEFORMS CC (V) TEST CONDITIONS min. typ. max. min. max. min. tPHL/ tPLH tPZH/ tPZL tPHZ/ tPLZ tTHL/ tTLH tW tsu th fmax propagation delay CP to Qn 3-state output enable time OE to Qn 3-state output disable time OE to Qn output transition time clock pulse width HIGH or LOW set-up time Dn to CP hold time Dn to CP maximum clock pulse frequency 19 12 5 26 16 16 18 5 11 7 -3 44 32 30 28 12 24 15 5 21 40 38 35 15 December 1990 6 Philips Semiconductors Product specification Octal D-type flip-flop; positive edge-trigger; 3-state AC WAVEFORMS 74HC/HCT374 (1) HC : VM = 50%; VI = GND to VCC. HCT : VM = 1.3 V; VI = GND to 3 V. Fig.6 Waveforms showing the clock (CP) to output (Qn) propagation delays, the clock pulse width, output transition times and the maximum clock pulse frequency. (1) HC : VM = 50%; VI = GND to VCC. HCT : VM = 1.3 V; VI = GND to 3 V. Fig.7 Waveforms showing the 3-state enable and disable 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. Fig.8 Waveforms showing the data set-up and hold times for Dn input. December 1990 7 Philips Semiconductors Product specification Octal D-type flip-flop; positive edge-trigger; 3-state PACKAGE OUTLINES See "74HC/HCT/HCU/HCMOS Logic Package Outlines". 74HC/HCT374 December 1990 8 |
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