74147

10-to-4 line priority encoder


A₃	1 •	16	Vcc
A₄	2	15	NC
A₅	3	14	Y₃
A₆	4	13	A₂
A₇	5	12	A₁
Y₂	6	11	A₀
Y₁	7	10	A₈
GND	8	9	Y₀

Pin	Symbol	Description
1	A₃	decimal data input (active low)
2	A₄	decimal data input (active low)
3	A₅	decimal data input (active low)
4	A₆	decimal data input (active low)
5	A₇	decimal data input (active low)
6	Y₂	BCD address output (active low)
7	Y₁	BCD address output (active low)
8	GND	ground
9	Y₀	BCD address output (active low)
10	A₈	decimal data input (active low)
11	A₀	decimal data input (active low)
12	A₁	decimal data input (active low)
13	A₂	decimal data input (active low)
14	Y₃	BCD address output (active low)
15	NC	no connection
16	Vcc	supply voltage

Specifications

(typical values under recommended operating conditions, unless specified)

Parameter	Value	Unit
Propagation delay, A_n to Y_n	15 (74HC) 17 (74HCT)	ns

Notes

When two or more inputs are simultaneously active, the input with the highest priority is represented on the output.
A₈ has the highest priority.
When all nine data inputs are high, all four outputs are high. (BCD zero)

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