D1	1  •	16	Vcc
D2	2	15	D0
D3	3	14	WA
RB	4	13	WB
RA	5	12	WE
Q3	6	11	RE
Q2	7	10	Q0
GND	8	9	Q1

Pin	Symbol	Description
1	D1	data input
2	D2	data input
3	D3	data input
4	RB	read address input
5	RA	read address input
6	Q3	data output
7	Q2	data output
8	GND	ground
9	Q1	data output
10	Q0	data output
11	RE	3-state output read enable (active low)
12	WE	write enable (active low)
13	WB	write address input
14	WA	write address input
15	D0	data input
16	Vcc	supply voltage

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

Parameter	Value	Unit
Propagation delay, Dn to Qn	23 (74HC/HCT]	ns