TRIPLE 3-INPUT NOR GATE FEATURES Output capability: standard lec category: SS! GENERAL DESCRIPTION The 74HC/HCT27 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. The 74HC/HCT27 provide the 3-input NOR function. 74HC/HCT27 SSI TYPICAL SYMBOL PARAMETER CONDITIONS UNIT HC HCT teHL/ propagation delay CL = 15 pF 8 10 ns tPLH nA, nB, nC to nY Vec=5V c| input capacitance 3.5 3.5 pF power dissipation Cpp capacitance per gate notes 1 and 2 24 30 pF GND =0 V; Tamb = 25 C; ty = te = 6 ns Notes 1. Cpp is used to determine the dynamic power dissipation (Pp in pW): Pp =Cpp x Vcc x fi + = (CL x Vcc? x fo) where: fj = input frequency in MHz fo = output frequency in MHz Z (CL x Voc? x fp) = sum of output 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 14+4ead DIL: plastic (SOT27). 14-laad mini-pack; plastic (S014; SOT108 PIN DESCRIPTION A). output load capacitance in pF supply voltage in V PIN NO. SYMBOL NAME AND FUNCTION 1,3,9 1A to 3A data inputs 2, 4, 10 1B to 3B data inputs 13, 5, 11 1C to 3C data inputs 7 GND ground {0 V} 12, 6, 8 1 to 3 data outputs 14 Vcc positive supply voltage aL] U 14] Yee 1B [2] ta] 1 2a [3 | fz] 1v zea] a7 [i]ac ac [| 0] 38 ay [s | [9] 3a cno [7 | 3] 3v FZB7417.1 Fig. 1 Pin configuration. 7287418. Fig. 2 Logic symbol. Fig. 3 IEC logic symbol. 7Z93113,1 Printed From CAPS XPert Version 1.2P This Material Copyrighted By Philips Semiconductors. December 1990 16174HC/HCT27 SS! 7Z87418.1 Fig. 4 Functional diagram. FZ93114 Fig. 5 Logic diagram (one gate). DC CHARACTERISTICS FOR 74HC FUNCTION TABLE INPUTS OUTPUT nA nB nc ny L x H x xix & I xx XI cee H = HIGH voltage level L = LOW voltage level X% = don't care For the DC characteristics see chapter HCMOS family characteristics, section Family specifications. Output capability: standard Icc category: SSI AC CHARACTERISTICS FOR 74HC GND = 0 V; tp = te = 6 ns; CL = 50 pF Tamb (C) TEST CONDITIONS 74HC SYMBOL | PARAMETER UNIT | Vcc | WAVEFORMS +25 40 to +85 | 40 to +125 Vv min.| typ. | max. | min.| max. | min. | max. . 28 90 115 135 2.0 tPHL/ Propagation delay 10 | 18 23 27 | ns 45 | Fig 6 tPLH nA, nB, nC tonY B 15 20 93 60 / 19 75 95 110 2.0 tTHL output transition time 7 15 19 22 ns 4.5 Fig. 6 TLH 6 | 13 16 19 6.0 162 March 1988 Printed From CAPS XPert Version 1.2P This Material Copyrighted By Philips Semiconductors.Triple 3-input NOR gate DC CHARACTERISTICS FOR 74HCT 74HC/HCT27 SSI For the DC characteristics see chapter HCMOS family characteristics, section Family specifications. Output capability: standard icc category: SSI Note to HCT types The value of additional quiescent supply current (Alqc) for a unit load of 1 is given in the family specifications. To determine Alc per input, multiply this value by the unit load coefficient shown in the table below, INPUT UNIT LOAD COEFFICIENT nA, nB, nc 1.50 AC CHARACTERISTICS FOR 74HCT GND = 0 Vit, = ty = 6 ns; C_ = 50 pF Tamb (C) TEST CONDITIONS 74HCT SYMBOL| PARAMETER UNIT | Vec | WAVEFORMS +25 40 to +85 | 40 to +125 Vv min.| typ. | max.| min.| max. | min. | max. tpHL/ propagation delay 32 45 Fig. 6 tPLH nA, nB, nC tonY 12 | 21 26 ns '9 TTHL/ | gutput transition time 7 | 15 19 22 | ns 45 | Fig 6 tTLH Printed From CAPS XPert Version 1.2P This Material Copyrighted By Philips Semiconductors. January 1986 16374HC/HCT27 SSI AC WAVEFORMS nA, 0B, nc INPUT ay OUTPUT TZ93115 Fig. 6 Waveforms shawing the input (nA, nB, nC) to output (nY) propagation delays and the Note to AC waveforms output transition times, (1) HC: Vy = 50%; V;) = GND to Vcc. HCT: Vy =1.3V; Vj = GND to3V. 164 January 1986 Printed From CAPS XPert Version 1.2P This Material Copyrighted By Philips Semiconductors.