IDT74FCT162543ATPAB Datasheet



The FCT16543T/AT/CT/ET and FCT162543T/AT/CT/ET 16-bit latched transceivers are built using advanced dual metal CMOS technology. These high-speed, low-power devices are organized as two independent 8-bit D-type latched transceivers with separate input and output control to permit independent control of data flow in either direction. For example, the A to-B Enable (xCEAB) must be LOW in order to enter data from the A port or to output data from the B port. xLEAB controls the latch function. When xLEAB is LOW, the latches are transparent. A subsequent LOW-to-HIGH transition of xLEAB signal puts the A latches in the storage mode. xOEABperforms output enable function on the B port. Data flow from the B port to the A port is similar but requires using xCEBA, xLEBA, and xOEBA inputs. Flow-through organization of signal pins simplifies layout. All inputs are designed with hysteresis for improved noise margin.
The FCT16543T/AT/CT/ET are ideally suited for driving high-capacitance loads and low-impedance backplanes. The output buffers are designed with power off disable capability to allow "live insertion" of boards when used as backplane drivers.
The FCT162543T/AT/CT/ET have balanced output drive with current limiting resistors. This offers low ground bounce, minimal undershoot, and controlled output fall times–reducing the need for external series terminating resistors. The FCT162543T/AT/CT/ET are plug-in replacements for the FCT16543T/AT/CT/ET and 54/74ABT16543 for on-board bus interface applications.

• Common features:
   – 0.5 MICRON CMOS Technology
   – High-speed, low-power CMOS replacement for ABT functions
   – Typical tSK(o) (Output Skew) < 250ps
   – Low input and output leakage ≤1µA (max.)
   – ESD
      > 2000V per MIL-STD-883, Method 3015;
      > 200V using machine model (C = 200pF, R = 0)
   – Packages include 25 mil pitch SSOP, 19.6 mil pitch TSSOP, 15.7 mil pitch TVSOP and 25 mil pitch Cerpack
   – Extended commercial range of -40°C to +85°C
   – VCC = 5V ±10%
• Features for FCT16543T/AT/CT/ET:
   – High drive outputs (-32mA IOH, 64mA IOL)
   – Power off disable outputs permit “live insertion”
   – Typical VOLP (Output Ground Bounce) < 1.0V at VCC = 5V, TA = 25°C
• Features for FCT162543T/AT/CT/ET:
   – Balanced Output Drivers: ±24mA (commercial), ±16mA (military)
   – Reduced system switching noise
   – Typical VOLP (Output Ground Bounce) < 0.6V at VCC = 5V,TA = 25°C



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