SNJ54ALS569AJ

Counter Dividers Overview

The SNJ54ALS569AJ is a military-grade synchronous 4-bit binary up/down counter with 3-state outputs. It operates within a supply voltage range of 4.5 V to 5.5 V and supports a maximum clock frequency of 22 MHz. The device features fully synchronous clear, count, and load functions triggered by the positive-going edge of the clock input, alongside an asynchronous clear capability. Propagation delays from CLK to Q outputs range from 4 ns to 21 ns. It includes ripple-carry (RCO) and clocked carry (CCO) outputs for cascading. The component is housed in a 20-pin ceramic dual in-line package (CDIP) and is rated for operation across a temperature range of -55°C to 125°C.

Counter Dividers Feature Summary

• Supports both synchronous and asynchronous clearing operations
• Provides 3-state outputs that drive bus lines directly
• Features independent counter operation relative to output enable states
• Includes dedicated ripple-carry and clocked carry outputs for cascading

Counter Dividers Applications

• Military-grade digital counting systems
• High-speed data processing counters
• Cascaded multi-stage binary counters
• Bus interface timing control circuits

Counter Dividers Procurement Notes

Verify the specific ordering suffix 'J' corresponds to the ceramic dual in-line package (CDIP). Confirm the part number prefix 'SNJ' indicates Texas Instruments' military qualification standards. Ensure the procurement documentation explicitly references the full military temperature range specifications. Validate RoHS exemption status as required for the specific manufacturing lot.

Counter Dividers Selection Notes

Select this component when military-qualified reliability and extended temperature performance are mandatory. The ALS logic family offers a balance of speed and power consumption suitable for complex digital designs. Verify that the 3-state output requirements align with the system's bus architecture. Consider the 20-pin CDIP footprint constraints during the PCB layout phase.

Counter Dividers Part Context

This device belongs to the Texas Instruments SN54/74ALS series of logic components. The SN54 variant specifically denotes military qualification, distinguishing it from the commercial SN74 version. It serves as a binary counter counterpart to the decade counter SN54ALS568A. The series utilizes advanced low-power Schottky technology to achieve high switching speeds while maintaining reduced power dissipation compared to standard logic families.

Counter Dividers Replacement Considerations

The SN54ALS569A is the direct functional equivalent. For commercial applications, the SN74ALS569A provides identical logic functionality but lacks military temperature ratings. Alternative packages such as the plastic DIP (N) or small-outline (DW) variants exist for the SN74 series.