CY74FCT399T

QUAD 2-INPUT REGISTER

SCCS024A – MARCH 1994 – REVISED OCTOBER 2001

1

POST OFFICE BOX 655303

With FCT and F Logic

Equivalent FCT Functions

Significantly Improved Noise

Characteristics

Operation

– 2000-V Human-Body Model (A114-A)

– 200-V Machine Model (A115-A)

– 1000-V Charged-Device Model (C101)

Output Logic Levels

32-mA Output Source Current

description

The CY74FCT399T is a high-speed quad 2-input register that selects four bits of data from either of two sources

(ports) under control of a common select (S) input. Selected data are transferred to a 4-bit output register

synchronous with the low-to-high transition of the clock (CP) input. The 4-bit D-type output register is fully edge

the low-to-high transition of CP for predictable operation. The CY74FCT399T has noninverted outputs.

preventing damaging current backflow through the device when it is powered down.

PIN DESCRIPTION

NAME

DESCRIPTION

S

Common select input

CP

Clock-pulse input (active rising edge)

I0

Data inputs from source 0

I1

Data inputs from source 1

Q

Register noninverted outputs

ORDERING INFORMATION

TA

PACKAGE†

SPEED

(ns)

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

SOIC

SO

Tube

6.1

CY74FCT399CTSOC

FCT399C

40

°Cto85°C

SOIC – SO

Tape and reel

6.1

CY74FCT399CTSOCT

FCT399C

–40

°C to 85°C

SOIC

SO

Tube

7

CY74FCT399ATSOC

FCT399A

SOIC – SO

Tape and reel

7

CY74FCT399ATSOCT

FCT399A

† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines

are available at www.ti.com/sc/package.

Copyright

 2001, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

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2

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6

7

8

16

15

14

13

12

11

10

9

S

GND

CP

SO PACKAGE

(TOP VIEW)