Philips Semiconductors

Product specification

74F2245

Octal transceiver with 30

W equivalent output termination

(3-State)

2

1996 May 10

853-1833 16802

FEATURES

conditions

DESCRIPTION

The 74F2245 is an octal transceiver featuring non-inverting 3-State

bus compatible outputs in both transmit and receive directions. The

device features an Output Enable (OE) input for easy cascading and

Transmit/Receive (T/R) input for direction control. The 3-State

outputs, B0-B7, have been designed to prevent output bus loading if

the power is removed from the device.

The 30 Ohm series termination on the outputs reduces

over/undershoot making them ideal for driving DRAM.

PIN CONFIGURATION

SF00198

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

T/R

A0

A1

A2

A3

A4

A5

A6

A7

GND

OE

B0

B1

B2

B3

B4

B6

B5

B7

TYPE

TYPICAL PROPAGATION DELAY

TYPICAL SUPPLY CURRENT (TOTAL)

74F2245

4.0ns

70mA

ORDERING INFORMATION

DESCRIPTION

COMMERCIAL RANGE

DRAWING NUMBER

20-Pin Plastic DIP

N74F2245N

SOT146-1

20-Pin Plastic SOL

N74F2245D

SOT163-1

20-Pin Plastic SSOP

N74F2245DB

SOT339-1

INPUT AND OUTPUT LOADING AND FAN-OUT TABLE

PINS

DESCRIPTION

74F (U.L.) HIGH/LOW

LOAD VALUE HIGH/LOW

A0-A7, B0-B7

Data inputs

3.5/1.0

70

µA/0.6mA

OE

Output Enable input (active Low)

1.0/2.0

20

µA/1.2mA

T/R

Transmit/Receive input

1.0/2.0

20

µA/1.2mA

A0-A7

A port outputs

150/8

3.0mA/5mA*

B0-B7

B port outputs

150/8

3.0mA/5mA*

NOTE: One (1.0) FAST unit load is defined as: 20

µA in the High state and 0.6mA in the Low state.

*

12mA with reduced noise margin