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Product Detailed Parameters
- Description：HIGH SPEED CMOS LOGIC OCTAL D-TY
- Series：54HC
- Mfr：Texas Instruments
- Package：Tube
- Function：Master Reset
- Type：D-Type
- Output Type：Non-Inverted
- Number of Elements：1
- Number of Bits per Element：8
- Clock Frequency：60 MHz
- Max Propagation Delay @ V, Max CL：26ns @ 6V, 50pF
- Trigger Type：Positive Edge
- Current - Output High, Low：5.2mA, 5.2mA
- Voltage - Supply：2V ~ 6V
- Current - Quiescent (Iq)：8 µA
- Operating Temperature：-55°C ~ 125°C (TA)
- Mounting Type：Through Hole
- Supplier Device Package：20-CDIP
- Package / Case：20-CDIP (0.300", 7.62mm)
- Input Capacitance：10 pF
- Grade：-
- Qualification：-
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Overview
The CD54HC273F is a high-speed CMOS logic octal D-type flip-flop manufactured by Texas Instruments. It features eight D-type flip-flops with positive-edge triggering and an asynchronous master reset input. The device operates within a supply voltage range of 2V to 6V and supports data rates up to 20 MHz. It provides buffered inputs and offers standard output drive capabilities of 10 LSTTL loads, or 15 LSTTL loads in bus driver configurations. The component is designed for military-grade reliability, operating across an extended temperature range of -55°C to 125°C.
Feature Summary
- Positive-edge triggered octal D-type flip-flop architecture
- Asynchronous master reset function for immediate clearing
- Buffered inputs to reduce loading on driving circuits
- Extended temperature operation suitable for harsh environments
Applications
- Military-grade digital storage systems
- High-speed data acquisition interfaces
- Industrial control logic registers
- Aerospace telemetry data latching
Procurement Notes
Verify the specific suffix 'F' indicates the 20-lead ceramic dual in-line package (CDIP). Confirm that the order specifies the military-grade variant required for -55°C to 125°C operation. Ensure compatibility with existing board layouts for the CDIP footprint. Check for lead-free compliance if required by specific project standards, although military parts may have distinct regulatory considerations.
Selection Notes
Select this component when military-grade environmental tolerance is mandatory. The CD54HC273F is appropriate for applications requiring robust performance in extreme temperatures where commercial variants would fail. Consider the physical size constraints of the CDIP package compared to surface-mount alternatives like the SOIC version. Ensure the system design accommodates the power dissipation characteristics of the ceramic package.
Part Context
This part belongs to the HC (High-speed CMOS) logic family from Texas Instruments. It is the military-grade counterpart to commercial variants such as the CD74HC273. While sharing identical logical functionality, the CD54HC273F differs in packaging material and thermal resilience. It serves as a direct replacement for older TTL-based octal registers in modern CMOS designs requiring high noise immunity.
Replacement Considerations
- CD74HC273M
- CD74HC273E
FAQ
What is the trigger mechanism for the CD54HC273F?
The device uses positive-edge triggering, meaning data is captured at the rising edge of the clock signal.
How does the reset function operate?
It features an asynchronous master reset input that clears all eight flip-flops independently of the clock signal.
