IDT54/74FCT16652T/AT/CT/ET, FCT162652T/AT/CT/ET

FAST CMOS 16-BIT BUS TRANSCEIVER/REGISTER

MILITARY AND COMMERCIAL TEMPERATURE RANGES

3

PIN DESCRIPTION

Pin Names

Description

xAx

Data Register A Inputs

Data Register B Outputs

xBx

Data Register B Inputs

Data Register A Outputs

xCLKAB, xCLKBA Clock Pulse Inputs

xSAB, xSBA

Output Data Source Select Inputs

xOEAB, x

OEBA

Output Enable Inputs

°C, f = 1.0MHz)

Symbol

Conditions

Typ.

Max.

Unit

Input

Capacitance

4.5

6.0

pF

I/O

Capacitance

5.5

8.0

pF

NOTE:

1. This parameter is measured at characterization but not tested.

2549 lnk 02

2549 tbl 01

FUNCTION TABLE

(2)

Inputs

Operation or Function

xOEAB

x

OEBA

OEBA

xCLKAB

xCLKBA

xSAB

xSBA

xAx

xBx

L

L

H

H

H or L

↑

H or L

↑

X

X

X

X

Input

Input

Isolation

Store A and B Data

X

H

H

H

↑

↑

H or L

↑

X

X

X

Input

Input

Output

Store A, Hold B

Store A in Both Registers

L

L

X

L

H or L

↑

↑

↑

X

X

X

Output

Input

Input

Hold A, Store B

Store B in both Registers

L

L

L

L

X

X

X

H or L

X

X

L

H

Output

Input

Real Time B Data to A Bus

Stored B Data to A Bus

H

H

H

H

X

H or L

X

X

L

H

X

X

Input

Output

Real Time A Data to B Bus

Stored A Data to B Bus

H

L

H or L

H or L

H

H

Output

Output

Stored A Data to B Bus and

Stored B Data to A Bus

NOTES:

1. The data output functions may be enabled or disabled by various signals at the xOEAB or x

OEBA inputs.

Data input functions are always enabled, i.e. data at the bus pins will be stored on every LOW-to-HIGH

transition on the clocks inputs.

2. Select control = L: clocks can occur simultaneously.

Select control = H: clocks must be staggered to load both registers.

3. H = HIGH Voltage Level

L = LOW Voltage Level

X = Don't care

↑ = LOW-to-HIGH Transition

ABSOLUTE MAXIMUM RATINGS

(1)

2549 tbl 03

Symbol

Description

Max.

Unit

GND

–0.5 to +7.0

V

GND

–0.5 to

V

Storage Temperature

–65 to +150

°C

DC Output Current

–60 to +120

mA

2549 lnk 04

NOTES:

1. Stresses greater than those listed under ABSOLUTE MAXIMUM RAT-

INGS may cause permanent damage to the device. This is a stress rating

only and functional operation of the device at these or any other conditions

above those indicated in the operational sections of this specification is

not implied.

Exposure to absolute maximum rating conditions for

extended periods may affect reliability.

2. All device terminals except FCT162XXXT Output and I/O terminals.

3. Output and I/O terminals for FCT162XXXT.