具有三态输出8位收发器 8-BIT TRANSCEIVERS WITH 3-STATE OUTPUTS
description
The ’FCT245T devices contain eight noninverting bidirectional buffers with 3-state outputs and are
intended for bus-oriented applications.
The transmit/receive T/R input determines the direction of data flow through these bidirectional transceivers. Transmit active high enables data from A ports to B ports. The output enable OE, when high, disables both the A and B ports by putting them in the high-impedance state.
These devices are 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.
Function, Pinout, and Drive Compatible With FCT and F Logic
Reduced VOHTypically = 3.3 V Versions of Equivalent FCT Functions
Edge-Rate Control Circuitry for Significantly Improved Noise Characteristics
Ioff Supports Partial-Power-Down Mode Operation
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model A114-A
– 200-V Machine Model A115-A
– 1000-V Charged-Device Model C101
Matched Rise and Fall Times
Fully Compatible With TTL Input and Output Logic Levels
CY54FCT245T
– 48-mA Output Sink Current
12-mA Output Source Current
CY74FCT245T
– 64-mA Output Sink Current
32-mA Output Source Current
3-State Outputs