74645 Octal 3-state Bus Transceiver

Pin Arrangement

DIR = L : B A
DIR = H : A B

Electrical Characteristics

Propagation Delay

Input	Output	N	LS	ALS	ALS 1000	F	S	AS	AS 1000	HC	HCT	Unit [max]
A,B	B,A	-	15	10	13	-	-	9.5	-	-	-	nS
G'	Z A,B	-	45	20	25	-	-	11	-	-	-	nS
	A,B - > Z	-	15	15	18	-	-	12	-	-	-	nS




Input Characteristics

		N	LS	ALS	ALS 1000	F	S	AS	AS 1000	Unit
All Inputs	High	-	20	20	20	-	-	50	-	uA
	Low	-	0.4	0.1	0.1	-	-	0.2	-	mA




Output Characteristics

		N	LS	ALS	ALS 1000	F	S	AS	AS 1000	HC	HCT	Unit
A,B	High	-	15	15	15	-	-	15	-	-	-	mA
	Low	-	24	24	16	-	-	64	-	-	-	mA
3S	High@High-Z	-	400	-	-	-	-	200	-	-	-	uA
	Low@High-Z	-	20	-	-	-	-	50	-	-	-	mA

Reference

74LS645-1, 74ALS645-1 : I_OL = 48mA
74ALS1645-1 : I_OL = 24mA


IC #	Logic	Output Type	Comment
74LS638	Inverted	OC / Tri-State	.
74LS639	Non-Inverted	OC / Tri-State	.
74LS640	Inverted	Tri-State	.
74LS641	Non-Inverted	OC	.
74LS642	Inverted	OC	.
74LS643	Inverted / Non-Inverted	Tri-State	.
74LS644	Inverter / Non-Inverted	OC	.
74LS645	Non-Inverted	Tri-State	= 74LS245