©1996 IIntegrated Device Technology, Inc.

8.16

DSC-2555/4

Integrated Device Technology, Inc.

The IDT logo is a registered trademark of Integrated Device Technology, Inc.

IDT54/74FCT164245T

FAST CMOS 16-BIT

BIDIRECTIONAL

3.3V TO 5V TRANSLATOR

1

DIR

1

OE

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

2555 drw 01

2

DIR

2

OE

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2555 drw 02

1

MILITARY AND COMMERCIAL TEMPERATURE RANGES

FEBRUARY 1996

FEATURES:

• 0.5 MICRON CMOS Technology

• Bidirectional interface between 3.3V and 5V busses

• Control inputs can be driven from either 3.3V

or 5V circuits

• ESD >2000V per MIL-STD-883, Method 3015;

>200V using machine model (C = 200pF, R = 0)

• 25 MIL Center SSOP and Cerpack Packages

• Extended commercial range of -40

°C to +85°C

• Power-off disable on both ports permits "live insertion"

°C

DESCRIPTION:

The FCT164245T 16-bit 3.3V-to-5V translator is

built

using advanced dual metal CMOS technology. This high-

speed, low-power transceiver is designed to interface be-

tween a 3.3V bus and a 5V bus in a mixed 3.3V/5V supply

environment. This enables system designers to interface TTL

compatible 3.3V components with 5V components.

The

direction and output enable controls operate these devices as

either two independent 8-bit transceivers or one 16-bit trans-

ceiver. The A port interfaces with the 3.3V bus; the B port

interfaces with the 5V bus. The direction control (xDIR) pin

controls the direction of data flow. The output enable (x

OE)

overrides the direction control and disables both ports. These

control signals can be driven from either 3.3V or 5V devices.

The FCT164245T is ideally suited for driving high capaci-

tance loads and low impedance backplanes. The output

buffers are designed with Power-Off Disable capability to

allow "hot insertion" of boards when used as backplane

drivers. They also allow interface between a mixed supply

system and external 5V peripherals.

FUNCTIONAL BLOCK DIAGRAM