74LVC374AT20 View Datasheet(PDF) - Diodes Incorporated.

Part Name

Description

Manufacturer

74LVC374AT20

OCTAL D-TYPE FLIP-FLOP WITH 3 STATE OUTPUTS

Diodes Incorporated. 

74LVC374A

OCTAL D-TYPE FLIP-FLOP WITH 3 STATE OUTPUTS

Description

The 74LVC374A provides eight edge-triggered D-type flip-flops

featuring 3-state outputs designed specifically for driving highly

capacitive or relatively low-impedance loads. These devices are

particularly suitable for implementing buffer registers, input/output (I/O)

ports, bidirectional bus drivers, and working registers. On the positive

transition of the clock (CLK) input, the Q outputs are set to the logic

levels set up at the data (D) inputs. A buffered output-enable (OE)

input can be used to place the eight outputs in either a normal logic

state (high or low logic levels) 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 increased drive provide

the capability to drive bus lines without interface or pullup components.

OE does not affect internal operations of the latch. Old data can be

retained or new data can be entered while the outputs are in the high-

impedance state.

The ‘374A is functionally identical to the ‘574A, but the’574 has a

different pin arrangement.

The device is designed for operation with a power supply range of

1.65V to 3.6V. The device is fully specified for partial power down

applications using IOFF.

Features

• Supply Voltage Range from 1.65V to 3.6V

• Sinks or Sources 24ma at VCC = 3V

• CMOS Low Power Consumption

• IOFF Supports Partial Power Down Operation

• Inputs or Outputs Accept Up to 5.5V

• Inputs Can Be Driven by 3.3V or 5V Allowing for Mixed Voltage

Applications

• Schmitt Trigger Action at All Inputs

• Typical VOLP (Quiet Output Ground Bounce) Less Than 0.8V with

VCC = 3.3V and TA = +25°C

• Typical VOHV (Quiet Output dynamic VOH) Greater than 2.0V with

VCC = 3.3V and TA = +25°C

• ESD Protection Tested per JESD 22

ƒ Exceeds 200-V Machine Model (A115)

ƒ Exceeds 2000-V Human Body Model (A114)

ƒ Exceeds 1000-V Charged Device Model (C101)

• Latch-Up Exceeds 250mA per JESD 78, Class I

• All devices are:

ƒ Totally Lead-Free & Fully RoHS compliant (Notes 1 & 2)

ƒ Halogen and Antimony Free. “Green” Device (Note 3)

Pin Assignments

OE

1Q

1D

2D

2Q

3Q

3D

4D

4Q

GND

( Top View )

1

20

2

19

3

18

4

17

5

16

6

15

7

14

8

13

9

12

10

11

TSSOP-20

( Top Transparent View)

Vcc terminal 1

index area

8Q

1Q 2

8D

1D 3

7D

2D 4

7Q

2Q 5

6Q

3Q 6

6D

3D 7

4D 8

5D

4Q 9

5Q

19 8Q

18 8D

17 7D

16 7Q

15 6Q

14 6D

13 5D

12 5Q

CLK

QFN-20

Applications

• General Purpose Logic

• Bus Driving

• Power Down Signal Isolation

• Wide array of products such as:

ƒ PCs, Notebooks, Netbooks, Ultrabooks

ƒ Networking Computer Peripherals, Hard Drives, CD/DVD

ROM

ƒ TV, DVD, DVR, Set Top Box

Notes:

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen and Antimony free,

"Green" and Lead-Free.

3. Halogen and Antimony free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.

74LVC374A

Document number: DS35895 Rev. 1 - 2

1 of 10

www.diodes.com

June 2014

© Diodes Incorporated

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