Circuitos Integrados

74590
8-bit binary counter with output register; 3-state
PDF datasheet
       
Q1 1  • 16 Vcc
Q2 2 15 Q0
Q3 3 14 OE
Q4 4 13 CPR
Q5 5 12 CE
Q6 6 11 CPC
Q7 7 10 MRC
GND 8 9 RCO
       
Pin Symbol Description
1 Q1 parallel data output
2 Q2 parallel data output
3 Q3 parallel data output
4 Q4 parallel data output
5 Q5 parallel data output
6 Q6 parallel data output
7 Q7 parallel data output
8 GND ground
9 RCO ripple carry output (active low)
10 MRC master reset (active low)
11 CPC counter clock input (active high)
12 CE count enable (active low)
13 CPR register clock input (active high)
14 OE output enable (active low)
15 Q0 parallel data output
16 Vcc supply voltage


Specifications
(typical values under recommended operating conditions, unless specified)
Parameter Value Unit
Propagation delay, CPR to RCO 19 (74HC) ns
Propagation delay, CPR to Qn 18 (74HC) ns
Maximum frequency, CPC and CPR 52 (74HC) MHz

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

BACK