74LVC374A

Document number: DS35895 Rev. 1 - 2

1 of 10

www.diodes.com

June 2014

© 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

Features

•

Supply Voltage Range from 1.65V to 3.6V

•

•

CMOS Low Power Consumption

•

•

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

•

•

•

ESD Protection Tested per JESD 22

Exceeds 200-V Machine Model (A115)

Exceeds 2000-V Human Body Model (A114)

Exceeds 1000-V Charged Device Model (C101)

•

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

•

All devices are:

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

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

Pin Assignments

1

3

2

4

5

6

7

8

Vcc

(Top View )

TSSOP-20

GND

10

9

13

14

12

11

17

18

16

15

19

20

2D

1D

2Q

3Q

3D

4D

4Q

1Q

OE

7Q

7D

6Q

6D

5D

5Q

CLK

8D

8Q

Top Transparent View

3

2

4

5

6

7

8

9

13

14

12

17

18

16

15

19

8Q

7Q

7D

6Q

6D

5D

5Q

8D

2D

1D

2Q

3Q

3D

4D

4Q

1Q

QFN-20

(

)

terminal 1

index area

Applications

•

General Purpose Logic

•

Bus Driving

•

Power Down Signal Isolation

•

Wide array of products such as:

PCs, Notebooks, Netbooks, Ultrabooks

Networking Computer Peripherals, Hard Drives, CD/DVD

ROM

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.