CY74FCT399CTSOC ,Quadruple 2-Input Multiplexers with Storage CY74FCT399T QUAD 2-INPUT REGISTER SCCS024A – MARCH 1994 – REVISED OCTOBER 2001SO PACKAGE* Functio ..
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CY74FCT399ATSOC-CY74FCT399CTSOC
Quadruple 2-Input Multiplexers with Storage
Significantly Improved Noise
Characteristics Ioff Supports Partial-Power-Down Mode
Operation Matched Rise and Fall Times ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101) Fully Compatible With TTL Input and
Output Logic Levels 64-mA Output Sink Current
32-mA Output Source Current
descriptionThe 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 (I0X, I1X) 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 Ioff . The Ioff circuitry disables the outputs,
preventing damaging current backflow through the device when it is powered down.
PIN DESCRIPTION
ORDERING INFORMATION 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.0A
I1A
I1B
I0B
GND0D
I1D
I1C
I0C
