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Product Detailed Parameters
- Description：54LS691FK/B
- Series：*
- Mfr：Rochester Electronics, LLC
- Package：Bulk
- Logic Type：-
- Direction：-
- Number of Elements：-
- Number of Bits per Element：-
- Reset：-
- Timing：-
- Count Rate：-
- Trigger Type：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Voltage - Supply：-
- Grade：-
- Qualification：-
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Overview
The 54LS691FK/B is a low-power Schottky LSI device manufactured by Rochester Electronics. It integrates a synchronous counter, a 4-bit D-type register, and a quad 2-to-1 multiplexer with three-state outputs. The component utilizes a ceramic DIP-14 package suitable for military and aerospace environments. It operates within a temperature range of -55 °C to 125 °C and features complementary outputs.
Feature Summary
- Integrates synchronous counter, 4-bit D-type register, and quad 2-to-1 multiplexer
- Provides three-state outputs for bus-organized systems
- Constructed in a ceramic metal-sealed cofired package
Applications
- Military data processing systems
- Aerospace control logic
- High-reliability digital storage applications
Procurement Notes
Verify the specific datasheet revision and test program used for manufacturing. Confirm that the component meets MIL-PRF-38535 Class Q or V requirements if applicable. Ensure the ordering suffix matches the required package and temperature grade. Request certification documents to validate the source of the die or wafer used in production.
Selection Notes
Select this component when a single package must provide counting, latching, and multiplexing functions. The LS series offers lower power consumption compared to standard TTL. The ceramic package provides superior environmental resistance. Verify pin compatibility with existing board layouts before integration.
Part Context
Rochester Electronics supplies manufactured components using dies from original suppliers or recreated wafers. All recreations are performed with the approval of the Original Component Manufacturer. Parts undergo testing using original factory programs or developed solutions to guarantee performance meets or exceeds the original datasheet specifications.
Replacement Considerations
Check for SN54LS691 equivalents. Verify pinout and electrical characteristics against the original design requirements. Ensure the replacement supports the same operating temperature range and package constraints.
