74640 Octal 3-state Bus Transceiver (inverted)

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]
Data	Inverted	-	15	11	15	-	22	7	-	22	29	nS
G'	Z A,B	-	45	24	22	-	30	10	-	56	38	nS
	A,B Z	-	15	15	13	-	18	13	-	52	38	nS




Input Characteristics

		N	LS	ALS	ALS 1000	F	S	AS	AS 1000	Unit
A,B	High	-	20	20	20	-	-	50	-	uA
	Low	-	0.4	0.1	0.1	-	-	0.75	-	mA
G',DIR	High	-	20	20	20	-	-	20	-	uA
	Low	-	0.4	0.1	0.1	-	-	0.5	-	mA




Output Characteristics

		N	LS	ALS	ALS 1000	F	S	AS	AS 1000	HC	HCT	Unit
3S	High	-	3	15	15	-	-	15	-	6	6	mA
	Low	-	24	24	16	-	-	64	-	6	6	mA
	High@High-Z	-	400	-	-	-	-	-	-	5	5	uA
	Low@High-Z	-	20	-	-	-	-	-	-	5	5	uA

Reference

74LS640-1, 74ALS640-1 : I_OL = 48mA
74ALS1640-1 : 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