CY74FCT2245T Octal Bus Transceivers with 3-State Outputs and Series Damping Resistors | TI.com

CY74FCT2245T (ACTIVE)

Octal Bus Transceivers with 3-State Outputs and Series Damping Resistors

Octal Bus Transceivers with 3-State Outputs and Series Damping Resistors - CY74FCT2245T
Datasheet
 

Description

The CY74FCT2245T contains eight noninverting, bidirectional buffers with 3-state outputs intended for bus-oriented applications. On-chip termination resistors at the outputs reduce system noise caused by reflections. For this reason, the CY74FCT2245T can replace the CY74FCT245T in an existing design. The CY74FCT2245T current-sinking capability is 12 mA at the A and B ports.

The transmit/receive (T/R) input determines the direction of data flow through the bidirectional transceiver. Transmit (active high) enables data from A ports to B ports; receive (active low) enables data from B ports to A ports. The output-enable (OE\) input, when high, disables both the A and B ports by putting them in the high-impedance state.

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 and Pinout Compatible With FCT and F Logic
  • 25- Output Series Resistors to Reduce Transmission-Line Reflection Noise
  • Edge-Rate Control Circuitry for Significantly Improved Noise Characteristics
  • Ioff Supports Partial-Power-Down Mode Operation
  • 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)
  • 12-mA Output Sink Current
    15-mA Output Source Current
  • 3-State Outputs

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Parametrics Compare all products in Standard transceiver

 
Technology Family
VCC (Min) (V)
VCC (Max) (V)
Bits (#)
Voltage (Nom) (V)
F @ nom voltage (Max) (Mhz)
ICC @ nom voltage (Max) (mA)
tpd @ Nom Voltage (Max) (ns)
IOL (Max) (mA)
IOH (Max) (mA)
Rating
Operating temperature range (C)
CY74FCT2245AT CY74FCT2245CT CY74FCT2245T
FCT     FCT     FCT    
4.75     4.75     4.75    
5.25     5.25     5.25    
8     8     8    
5     5     5    
70     70     70    
0.2     0.2     0.2    
4.6     4.1     7    
12     12     12    
-15     -15     -15    
Catalog     Catalog     Catalog    
-40 to 85     -40 to 85     -40 to 85