CY74FCT257T Quadruple 1-of-2 Data Selectors/Multiplexers with 3-State Outputs | TI.com

CY74FCT257T (ACTIVE) Quadruple 1-of-2 Data Selectors/Multiplexers with 3-State Outputs

Quadruple 1-of-2 Data Selectors/Multiplexers with 3-State Outputs - CY74FCT257T
Datasheet
 

Description

The CY74FCT257T has four identical two-input multiplexers that select four bits of data from two sources under the control of a common data-select (S) input. The I0 inputs are selected when S is low, and the I1 inputs are selected when S is high. Data at the output is noninverted.

The CY74FCT257T is a logic implementation of a four-pole, two-position switch, where the position of the switch is determined by the logic levels at S. Outputs are in the high-impedance state when the output-enable (OE\) input is high.

All but one device must be in the high-impedance state to avoid currents exceeding the maximum ratings if outputs are tied together. OE\ inputs must ensure that there is no overlap when outputs of 3-state devices are tied together.

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.

Features

  • Function, Pinout, and Drive Compatible With FCT and F Logic
  • Reduced VOH (Typically = 3.3 V) Version of Equivalent FCT Functions
  • Edge-Rate Control Circuitry for Significantly Improved Noise Characteristics
  • Ioff Supports Partial-Power-Down Mode Operation
  • Matched Rise and Fall Times
  • Fully Compatible With TTL Input and Output Logic Levels
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)
  • 64-mA Output Sink Current
    32-mA Output Source Current
  • 3-State Outputs

Parametrics

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Part number Order Function Technology Family VCC (Min) (V) VCC (Max) (V) Channels (#) Voltage (Nom) (V) F @ nom voltage (Max) (MHz) ICC @ nom voltage (Max) (mA) tpd @ nom Voltage (Max) (ns) Configuration Type IOL (Max) (mA) IOH (Max) (mA) Rating Operating temperature range (C) Package Group Package size: mm2:W x L (PKG) Bits (#) Digital input leakage (Max) (uA) ESD CDM (kV) ESD HBM (kV)
CY74FCT257AT Order now   FCT     4.75     5.25     4     5     70     0.2     5     2:1       64     -32     Catalog     -40 to 85     SOIC | 16
SSOP | 16    
16SOIC: 59 mm2: 6 x 9.9 (SOIC | 16)
16SSOP: 29 mm2: 6 x 4.9 (SSOP | 16)    
2     5     0.75     2    
CY74FCT257CT Samples not available   FCT     4.75     5.25     4     5     70     0.2     4.3     2:1       64     -32     Catalog     -40 to 85     SOIC | 16     16SOIC: 77 mm2: 7.5 x 10.3 (SOIC | 16)     2     5     0.75     2    
CY74FCT257T Samples not available Encoder
Multiplexer    
FCT     4.75     5.25     4     5     70     0.2     7     2:1     3-State Output     64     -32     Catalog     -40 to 85     SSOP | 16     16SSOP: 29 mm2: 6 x 4.9 (SSOP | 16)       5     0.75     2