74243

Quad bus transceiver; 3-state


OEA	1 •	14	Vcc
NC	2	13	OEB
A0	3	12	NC
A1	4	11	B0
A2	5	10	B1
A3	6	9	B2
GND	7	8	B3

Pin	Symbol	Description
1	OEA	output enable (active low)
2	NC	no connection
3	A0	data input or output
4	A1	data input or output
5	A2	data input or output
6	A3	data input or output
7	GND	ground
8	B3	data output or input
9	B2	data output or input
10	B1	data output or input
11	B0	data output or input
12	NC	no connection
13	OEB	output enable (active high)
14	Vcc	supply voltage

Specifications

(typical values under recommended operating conditions, unless specified)

Parameter	Value	Unit
Propagation delay, An to Bn; Bn to An	6 (74HC)	ns

Notes

When OEA and OEB are low, An are inputs.
When OEA and OEB are high, Bn are inputs.
Otherwise, An and Bn are in a high-impedance off state.

Note: Data is maintained by an independent source and accuracy is not guaranteed. Check with the manufacturer's datasheet for up-to-date information.