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Product Detailed Parameters
- Description：FAST OCTAL D REGISTER
- Series：-
- Mfr：Harris Corporation
- Package：Bulk
- Function：Standard
- Type：D-Type
- Output Type：Tri-State, Non-Inverted
- Number of Elements：1
- Number of Bits per Element：8
- Clock Frequency：70 MHz
- Max Propagation Delay @ V, Max CL：6.6ns @ 5V, 50pF
- Trigger Type：Positive Edge
- Current - Output High, Low：15mA, 48mA
- Voltage - Supply：4.75V ~ 5.25V
- Current - Quiescent (Iq)：8 µA
- Operating Temperature：0°C ~ 70°C (TA)
- Mounting Type：Surface Mount
- Supplier Device Package：20-QSOP
- Package / Case：20-SSOP (0.154", 3.90mm Width)
- Input Capacitance：10 pF
- Grade：-
- Qualification：-
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Overview
The CD74FCT374CTQM is an octal D-type flip-flop manufactured by Harris Corporation, belonging to the FCT logic series. It features eight positive-edge-triggered D-type flip-flops with 3-state outputs in a 20-pin SSOP package. The device operates within a supply voltage range of 4.5V to 5.5V and supports a load capacitance of 50 pF. It functions as a register with non-inverting output polarity and TTL-compatible inputs. The component is rated for operation between -40°C and +85°C.
Feature Summary
- Octal D-type flip-flop configuration with positive-edge triggering
- 3-state outputs enabling bus-driven applications
- TTL-compatible input structure for direct interface with TTL logic
- Bus hold inputs eliminate the need for external pull-up resistors
Applications
- General-purpose storage in digital systems
- Register applications requiring high-speed data latching
- Bus-oriented memory structures
Procurement Notes
Verify the manufacturer designation carefully, as Texas Instruments acquired Harris Semiconductor's logic products. Ensure the specific suffix CTQM corresponds to the SSOP-20 package and commercial temperature grade. Confirm RoHS status and moisture sensitivity level requirements against current assembly standards before procurement.
Selection Notes
Select this component when an octal register with 3-state outputs and TTL-compatible inputs is required. It is suitable for designs needing bus hold functionality to simplify circuitry. Consider the SSOP-20 package constraints and the 4.5V to 5.5V operating voltage range during system integration.
Part Context
This part belongs to the CD74FCT family of high-speed CMOS logic devices originally produced by Harris Corporation. The FCT series is characterized by TTL-compatible inputs and CMOS low power consumption. Harris Corporation was a significant manufacturer of these logic ICs before its semiconductor division was acquired by Texas Instruments.
Replacement Considerations
Texas Instruments CY74FCT374CTSOC is a documented equivalent offering similar octal D-type flip-flop functionality with 3-state outputs in an SOIC-20 package. Verify pinout compatibility and package dimensions when substituting.
