CY74FCT399T Datasheet, PDF (1/10 Pages) Texas Instruments – Quad 2-Input Register

CY74FCT399T
QUAD 2-INPUT REGISTER
D Function, Pinout, and Drive Compatible
With FCT and F Logic
D Reduced V_OH (Typically = 3.3 V) Versions of
Equivalent FCT Functions
D Edge-Rate Control Circuitry for
Significantly Improved Noise
Characteristics
D I_off Supports Partial-Power-Down Mode
Operation
D Matched Rise and Fall Times
D ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
D Fully Compatible With TTL Input and
Output Logic Levels
D 64-mA Output Sink Current
32-mA Output Source Current
SCCS024A – MARCH 1994 – REVISED OCTOBER 2001
SO PACKAGE
(TOP VIEW)
S₁
Q_A 2
I_0A 3
I_1A 4
I_1B 5
I_0B 6
Q_B 7
GND 8
16 ^V_CC
15 Q_D
14 I_0D
13 I_1D
12 I_1C
11 I_0C
10 Q_C
9 CP
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
triggered. The data inputs (I_0X, I_1X) and S input must be stable only one setup time prior to, and hold time after,
the low-to-high transition of CP for predictable operation. The CY74FCT399T has noninverted outputs.
This device is fully specified for partial-power-down applications using I_off. The I_off circuitry disables the outputs,
preventing damaging current backflow through the device when it is powered down.
NAME
S
CP
I0
I1
Q
PIN DESCRIPTION
DESCRIPTION
Common select input
Clock-pulse input (active rising edge)
Data inputs from source 0
Data inputs from source 1
Register noninverted outputs
ORDERING INFORMATION
TA
PACKAGE†
SPEED
(ns)
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
–40°C to 85°C
SOIC – SO
SOIC – SO
Tube
Tape and reel
Tube
Tape and reel
6.1
CY74FCT399CTSOC
FCT399C
6.1
CY74FCT399CTSOCT
7
CY74FCT399ATSOC
FCT399A
7
CY74FCT399ATSOCT
† _{Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines}
are available at www.ti.com/sc/package.
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.
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.
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Copyright  2001, Texas Instruments Incorporated
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