This is a kind of TTL Counter.
Part Number: 7493
Function: TTL 4Bit Binary Counter
Package: DIP 14 Pin Type
Manufacturer: NTE Electronics
The 7493 is a monolithic 4-bit binary counter in a 14 Lead DIP type package that contains four master−slave flip−flops and additional gating to provide a divide−by−two counter and a three−stage binary counter for which the count cycle length is divide−by−eight. The counter also contains a gated zero reset. To use the maximum count length of this device, the CKB input is connected to the QAoutput. The input count pulses are applied to CKA input and the outputs are as described in the function tables.
Absolute Maximum Ratings
1. Supply Voltage, VCC : 7V
2. Input Voltage, VIN : 5.5V
3. Interemitter Voltage : 5.5V
4. Power Dissipation : 130mW
5. Operating Temperature Range, TA : 0 ºC to +70 ºC
6. Storage Temperature Range, Tstg : −65 ºC to +150 ºC
Other data sheets are available within the file: 7493A, NTE7493A
7493 Datasheet PDF Download