CD74FCT374

Name: CD74FCT374
Brand: TI
SKU: CD74FCT374
Price: 0.42 USD

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BiCMOS FCT Interface Logic Octal D-Type Flip-Flops with 3-State Outputs

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Data sheet

document-pdfAcrobat BiCMOS Octal Edge-Triggered D-Type Flip-Flop With 3-State Outputs datasheet

CD74FCT374

ACTIVE

Data sheet

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Product details

Number of channels

8

Technology family

FCT

Supply voltage (min) (V)

4.75

Supply voltage (max) (V)

5.25

Input type

TTL-Compatible CMOS

Output type

3-State

Clock frequency (max) (MHz)

70

IOL (max) (mA)

48

IOH (max) (mA)

-15

Supply current (max) (µA)

80

Features

Very high speed (tpd 5-10ns)

Operating temperature range (°C)

0 to 70

Rating

Catalog

Number of channels

8

Technology family

FCT

Supply voltage (min) (V)

4.75

Supply voltage (max) (V)

5.25

Input type

TTL-Compatible CMOS

Output type

3-State

Clock frequency (max) (MHz)

70

IOL (max) (mA)

48

IOH (max) (mA)

-15

Supply current (max) (µA)

80

Features

Very high speed (tpd 5-10ns)

Operating temperature range (°C)

0 to 70

Rating

Catalog

SOIC (DW)

20

131.84 mm² 12.8 x 10.3

BiCMOS Technology With Low Quiescent Power
3-State Outputs Drive Bus Lines Directly
Buffered Inputs
Noninverted Outputs
Input/Output Isolation From V_CC
Controlled Output Edge Rates
48-mA Output Sink Current
Output Voltage Swing Limited to 3.7 V
SCR Latch-Up-Resistant BiCMOS Process and Circuit Design
Package Options Include Plastic Small-Outline (M) and Shrink Small-Outline (SM) Packages and Standard Plastic (E) DIP

BiCMOS Technology With Low Quiescent Power
3-State Outputs Drive Bus Lines Directly
Buffered Inputs
Noninverted Outputs
Input/Output Isolation From V_CC
Controlled Output Edge Rates
48-mA Output Sink Current
Output Voltage Swing Limited to 3.7 V
SCR Latch-Up-Resistant BiCMOS Process and Circuit Design
Package Options Include Plastic Small-Outline (M) and Shrink Small-Outline (SM) Packages and Standard Plastic (E) DIP

The CD74FCT374 is an octal, edge-triggered, D-type flip-flop that uses a small-geometry BiCMOS technology and features 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. This device is particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.

The output stage is a combination of bipolar and CMOS transistors that limits the output high level to two diode drops below V_CC. This resultant lowering of output swing (0 V to 3.7 V) reduces power-bus ringing [a source of electromagnetic interference (EMI)] and minimizes V_CC bounce and ground bounce and their effects during simultaneous output switching. The output configuration also enhances switching speed and is capable of sinking 48 mA.

The eight flip-flops enter data into their registers on the low-to-high transition of the clock (CLK). The output-enable (OE\) input controls the 3-state outputs and is independent of the register operation. When OE\ is high, the outputs are in the high-impedance state.

A buffered OE\ input can be used to place the eight outputs in either a normal logic state (high or low) or the high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and the increased drive provide the capability to drive bus lines without interface or pullup components.

OE\ does not affect internal operations of the flip-flop. Old data can be retained or new data can be entered while the outputs are in the high-impedance state.

To ensure the high-impedance state during power up or power down, OE\ should be tied to V_CCthrough a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

The CD74FCT374 is characterized for operation from 0°C to 70°C.