5-90 is the general term for SN54/74LS90, SN54/74LS92 and SN54/74LS93, which are all composed of 4-bit binary counters and can achieve BCD, binary, modulo 12, and modulo 16 counting
The SN54/74LS90, SN54/74LS92 and SN54/74LS93 are high‑speed 4‑bit ripple counters offering decade, divide‑by‑twelve and binary counting functions. Each device contains a divide‑by‑two section and a further divide‑by‑five, six or eight section, with separate clock inputs and optional master reset/set controls.
The handbook provides functional descriptions, pin‑name tables, logic symbols, ordering information, and detailed electrical characteristics such as supply voltage, input thresholds, output levels, propagation delays and maximum clock frequencies.
| Low Power Consumption | Typically 45 mW |
|---|---|
| High Count Rate | Typically 42 MHz |
| Supply Voltage (VCC) | Typical 5.0 V (4.5‑5.5 V range) |
| Input HIGH Voltage (VIH) | 2.0 V |
| Maximum CP Input Clock Frequency | 32 MHz |
The counters typically consume 45 mW of power.
The maximum CP input clock frequency is 32 MHz.
They operate at a typical 5.0 V, with a range from 4.5 V to 5.5 V.