DIR	1  •	20	Vcc
A0	2	19	OE
A1	3	18	B0
A2	4	17	B1
A3	5	16	B2
A4	6	15	B3
A5	7	14	B4
A6	8	13	B5
A7	9	12	B6
GND	10	11	B7

Pin	Symbol	Description
1	DIR	direction control
2	A0	data input/output
3	A1	data input/output
4	A2	data input/output
5	A3	data input/output
6	A4	data input/output
7	A5	data input/output
8	A6	data input/output
9	A7	data input/output
10	GND	ground
11	B7	data input/output
12	B6	data input/output
13	B5	data input/output
14	B4	data input/output
15	B3	data input/output
16	B2	data input/output
17	B1	data input/output
18	B0	data input/output
19	OE	output enable (active low)
20	Vcc	supply voltage

Specifications
(typical values under recommended operating conditions, unless specified)

Parameter	Value	Unit
Propagation delay, An to Bn	11 (74HC/HCT)	ns
Propagation delay, Bn to An	9 (74HC) 11 (74HCT)	ns