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D Function and Pinout Compatible With FCT
and F Logic
D 25-Ω Output Series Resistors to Reduce
Transmission-Line Reflection Noise
D TTL Output Level Versions of Equivalent
FCT Functions
D Edge-Rate Control Circuitry for
Significantly Improved Noise
Characteristics
D Ioff Supports Partial-Power-Down Mode
Operation
D Fully Compatible With TTL Input and
Output Logic Levels
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 12-mA Output Sink Current
15-mA Output Source Current
D 3-State Outputs
CY74FCT2257T
QUAD 2-INPUT MULTIPLEXER
WITH 3-STATE OUTPUTS
SCCS038B – SEPTEMBER 1994 – REVISED OCTOBER 2001
Q OR SO PACKAGE (TOP VIEW)
S
I0a I1a Ya I0b I1b Yb GND
1 2 3 4 5 6 7 8
16 VCC 15 OE
14 I0c 13 I1c 12 Yc
CY74FCT2257T Datasheet
