SN74ALS193ANG4

Counter Dividers Overview

The SN74ALS193ANG4 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 asynchronous clear and parallel asynchronous load capabilities for modulo-N counting. It utilizes look-ahead circuitry to enhance cascaded performance and eliminates output counting spikes through simultaneous flip-flop clocking. The component is housed in a 16-pin Plastic Dual In-Line (PDIP) package.

Counter Dividers Feature Summary

• Synchronous operation with all flip-flops clocked simultaneously to eliminate output counting spikes
• Parallel asynchronous load allows independent presetting of outputs without count pulses
• Look-ahead circuitry enhances cascaded counter performance without external logic
• Buffered UP, DOWN, and LOAD inputs reduce drive requirements for long parallel words

Counter Dividers Applications

• Modulo-N dividers via programmable preset inputs
• Cascaded multi-stage digital counters
• Reversible frequency division circuits
• Digital timing and sequencing systems

Counter Dividers Procurement Notes

Verify the specific ordering suffix 'G4' against current manufacturer documentation to confirm lead-free status and RoHS compliance details. Confirm that the PDIP-16 package availability aligns with current production lifecycle status. Ensure the component meets the required operating temperature range of 0°C to 70°C for commercial applications.

Counter Dividers Selection Notes

Select this component when synchronous counting without ripple delays is required in a 4-bit configuration. The ALS series offers improved speed and power consumption compared to standard LS logic. Verify that the buffered control inputs meet the drive capabilities of the system clock sources. Consider the 16-pin DIP package constraints if surface mount alternatives are not suitable for the design.

Counter Dividers Part Context

This part belongs to the SN54/74ALS193A family of synchronous 4-bit up/down binary counters. The SN74 variant is characterized for commercial temperatures (0°C to 70°C), while the SN54 variant covers military specifications (-55°C to 125°C). The 'G4' suffix typically indicates a lead-free and RoHS-compliant version of the standard SN74ALS193AN plastic DIP package.

Counter Dividers Replacement Considerations

SN74ALS193AN

Counter Dividers FAQ

How does the SN74ALS193A handle direction changes during counting?

The direction is determined by pulsing either the UP or DOWN input while the other remains high. Synchronous operation ensures outputs change coincidently on the low-to-high transition.

What is the function of the Carry (CO) and Borrow (BO) outputs?

The CO output produces a low-level pulse when the count reaches 15 (all Q outputs high) and the UP input is low. The BO output produces a low-level pulse when the count is zero and the DOWN input is low, facilitating easy cascading.