74LS193 Binary Up/Down Counter with Clear
Series 74LS
74LS193 overview
The 74LS series of integrated circuits (ICs) was one of the most popular logic families of transistor-transistor logic (TTL) logic chips. 74LS series is a bipolar, low-power Schottky IC.74LS193 is a UP/DOWN Module-16 Binary Counter. Separate Count Up and Count Down Clocks are used and in either counting mode the circuits operate synchronously
Key specifications
Supply Voltage
4.75 - 5.25Vdc
Maximum Clock Frequency
40Mhz
Power Dissipation
2mW/gate @100kHz
Minimum Output Current
8mA
Propagation Delay
10nS
Fan Out (TTL Loads)
20
Datasheet
sn74ls193.pdf
74LS193 features
- Synchronous Up/Down Mudulo-16 Binary Counter, Count is Updated with Low-to-High Clock Transition
- Synchronous Counting
- High Speed up to 25MHz
- Individual Preset Inputs
- Standard TTL Switching Voltages
74LS193 pinout
| Pin | Name | Description |
|---|---|---|
| 1 | B | Data Input Of Counter B |
| 2 | QB | Output Of Counter QB |
| 3 | QA | Output Of Counter QA |
| 4 | DOWN | Down Pin |
| 5 | UP | Up Pin |
| 6 | QC | Output Of Counter QC |
| 7 | QD | Output Of Counter QD |
| 8 | GND | Ground |
| 9 | D | Data Input Of Counter D |
| 10 | C | Data Input Of Counter C |
| 11 | LOAD' | Load Pin (Active Low) |
| 12 | CO' | Carry Output (Active Low) |
| 13 | BO' | Borrow Output (Active Low) |
| 14 | CLR | Clear Pin |
| 15 | A | Data Input Of Counter A |
| 16 | VCC | Positive Supply |
74LS193 applications
- Self-reversing counter
- Clock divider circuit
More about 74LS193
74LS193 Alternative Equivalent
74LS192
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