SN74ALS193AN

Counter Dividers Overview

The SN74ALS193AN is a synchronous, reversible 4-bit up/down binary counter manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and supports clock frequencies up to 30 MHz. The device features look-ahead circuitry for cascaded counters and allows parallel asynchronous loading for modulo-N count lengths. It includes an asynchronous clear function and buffered UP/DOWN/LOAD inputs to reduce driver loading. Characterized for operation from 0°C to 70°C, it is housed in a standard plastic 16-pin DIP package.

Counter Dividers Feature Summary

• Synchronous counting operation with simultaneous flip-flop clocking eliminates output counting spikes associated with ripple-clock counters.
• Parallel asynchronous load capability enables programmable presetting of outputs independently of count pulses for modulo-N applications.
• Look-ahead circuitry facilitates easy cascading of multiple counters without external logic components.
• Buffered control inputs (UP, DOWN, LOAD) significantly reduce drive requirements and current demand on clock drivers.

Counter Dividers Applications

• Cascaded binary counting systems
• Modulo-N frequency dividers
• Digital timing and sequencing circuits

Counter Dividers Procurement Notes

Verify the specific ordering suffix 'AN' corresponds to the Plastic DIP-16 package configuration. Confirm that the required operating temperature range aligns with the commercial grade specification of 0°C to 70°C rather than the military grade variant. Ensure compatibility with the 4.5 V to 5.5 V supply voltage limits during system design validation.

Counter Dividers Selection Notes

Select this component when synchronous operation is required to prevent glitch propagation in high-speed digital designs. The ALS series offers improved speed-power product compared to standard LS logic. Verify that the 30 MHz maximum clock frequency meets the application's timing requirements and that the 16-pin DIP form factor fits the target PCB layout constraints.

Counter Dividers Part Context

This part belongs to the SN74ALS193A family of synchronous 4-bit up/down counters. It is the commercial-grade version of the SN54ALS193A, distinguished by its extended operating temperature range of 0°C to 70°C versus -55°C to 125°C. The 'AN' suffix specifically denotes the standard plastic dual in-line package option provided by Texas Instruments.

Counter Dividers Replacement Considerations

SN74LS193N