74HC/HCT541 MSI OCTAL BUFFER/LINE DRIVER; 3-STATE FEATURES TYPICAL Non-inverting outputs SYMBOL PARAMETER CONDITIONS UNIT Output capability: bus driver HC HCT : lec category: MSI tPHL/ propagation delay CL = 15 pF 10 12 ns t Ag to Y, Vecoz5Vv GENERAL DESCRIPTION PLH o* ce . C| input capacitance 3.5 3.5 pF The 74HC/HCT541 are high-speed Si-gate CMOS devices and are pin power dissipation compatible with low power Schottky Crp capacitance per buffer notes 1 and 2 37 39 pF TTL {LSTTL). They are specified in compliance with JEDEC standard no. 7A. The 74HC/HCTS541 are octal non- GND =0 V; Tamb = 25C: ty = te = 6 ns inverting buffer/line drivers with 3-state Notes outputs. The 3-state outputs are ; 1. Cpp is used to determine the dynamic power dissipation (Pp in uW): Soa Geo output enable inputs Pp =Cpp x Vcc? x fi + (CL x VCC? x fo) where: A HIGH on OE, causes the outputs to fj = input frequency in MHz CL = output load capacitance in pF assume a high impedance OF F-state. fo = output frequency in MHz Vcc = supply voltage in V Z (Cy x Voc? x fo} = sum of outputs 2. For HC the condition is V} = GND to Vcc For HCT the condition is V] = GND to Vcc 1.5 V PACKAGE OUTLINES SEE PACKAGE INFORMATION SECTION The 541 is identical to the 540 but has non-inverting outputs. PIN DESCRIPTION PIN NO. SYMBOL NAME AND FUNCTION 1,19 OE1, OE2 output enable input {active LOW} 2, 3, 4, 5, ; 6.7.8.9 Ag to Az data inputs 10 GND ground (0 V) 18, 17, 16, 15, 14.13.1211 YotoY7 bus outputs 20 Vee positive supply voltage 20_] >a t 0] U [20] Yee > 7 OE ao[2| ] 2 2 > 16 af] [1a] Yo a | 4 Ad ig a Yy Hp 4a[5 18) Y2 Aa va (I 541 8) 6 Hp a[e] 15) 3 As 5 as fa) ve Tp ae[a] na} Ys > 2 (ef 2) ve 927 ay ono [10 [1] 7 _-t OE, 72396767 7296766 ' a7 19 7296771 Fig. 1 Pin configuration. Fig. 2 Logic symbol. Fig. 3 1EC togic symbol. December 1990 675 74HC/HCT541 MSI Fig. 4 F296776 Functional diagram. FUNCTION TABLE INPUTS OUTPUT OE, OE2 An Yn L L L L L L H H x H Xx z H x X zZ H = HIGH voltage level L. = LOW voltage level X = dont care Z =high impedance OFF-state ONE BUFFERS LINE DRIVER a Veco Peed Lis > GNO A Yd y = na | / -~ - + aal | | -/} - ~ + as 3 = Aq _ 4 Yq oy ve as) H-- x 5 Fe TD Vg alr), L_ EIGHT IDENTICAL CIRCUITS 7296768 Fig. 5 Logic diagram. 676 April 1987 Octal buffer/line driver; 3-state 74HC/HCT541 MSI DC CHARACTERISTICS FOR 74HC For the DC characteristics see chapter HCMOS family characteristics, section Family specifications. Output capability: bus driver \cc category: MSI AC CHARACTERISTICS FOR 74HC GND =0 V; ty = t = 6 ns; CL = 50 pF Tamb (C) TEST CONDITIONS 74HC SYMBOL | PARAMETER UNIT | Voc | WAVEFORMS +25 40 to +85 | 40 to +125 Vv min.| typ. | max. | min.| max. | min. | max. . 33 | 115 145 175 2.0 tPHL/ | Propagation delay 12 | 23 29 35 |ns | 48 | Fig.6 'PLH An to Yn 10 | 20 25 30 6.0 t | tput enable time 55 | 160 200 240 2.0 eZ! | Satae ouput enable wi 20 | 32 40 48 {ns | 45 | Fig.7 PZL nion 16 | 27 34 41 6.0 tpyz/ 3-state output disable time 5 x N o~ ns ae Fig. 7 1PLZ OE, to Yq 1g | 27 34 41 6.0 tru / 14 | 60 75 90 2.0 He output transition time 5 12 16 18 ns 45 Fig. 6 TLH 4 10 13 15 6.0 April 1987 677 74HC/HCT541 MSI DC CHARACTERISTICS FOR 74HCT For the DC characteristics see chapter HCMOS family characteristics, section Family specifications. Output capability: bus driver lec 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 Alec per input, multiply this value by the unit toad coefficient shown in the table below. UNIT LOAD INPUT | COEFFICIENT OE, 1.50 OE 1.00 An 0.70 AC CHARACTERISTICS FOR 74HCT GND =O V;t, =t=6 ans; Cy = 50 pF Tamb (C) TEST CONDITIONS 74HCT SYMBOL | PARAMETER UNIT | Voc | WAVEFORMS +25 40 to +85 | 40 to +125 Vv min.| typ. ; max. | min. | max. | min. | max. teHL/ propagation detay : tPLH A, to Yq 15 | 28 35 42 ns 45 Fig. 6 tpzH/ 3-state output enable time . tPzL nto Yn 21 =| 35 44 53 ns 4.5 Fig. 7 tpH2/ 3-state output disable time : PLZ BE, to Yq 21 | 35 44 53 ns 4.5 Fig. 7 ral! output transition time 5 12 15 18 ns 45 Fig. 6 678 April 1987 Octal buffer/tine driver; 3-state 74HC/HCT541 MSI AC WAVEFORMS Ag, INPUT Y, OUTPUT 7296768 + he tun Fig. 6 Waveforms showing the input {Aj} to output (Yn) propagation delays and the output transition times. OUTPUT LOW -to-OFF OFF -to- LOW OvTPUT HIGH - to -OF F OFF -10- HIGH outputs wle outputs __..|4 outputs 7283691 enabled disabled enabled Fig. 7 Waveforms showing the 3-state enable and disable times. Note to AC waveforms (1) HC + Vy = 50%; Vj = GND to Vcc. HCT: Vy = 1.3V; V) = GND to 3V. April 1987 679