Philips Semiconductors

Product specification

74F2373

Octal transparent latch with 30

Ω equivalent output

termination (3-State)

2

1999 Feb 01

853-2140 20747

FEATURES

DESCRIPTION

The 74F2373 is an octal transparent latch coupled to eight 3-State

output devices. The two sections of the device are controlled

independently by enable (E) and output enable (OE) control gates.

The 30 Ohm series termination on the outputs reduces

over/undershoot, making them ideal for driving DRAM

The data on the D inputs is transferred to the latch outputs when the

enable (E) input is high. The latch remains transparent to the data

input while E is high, and stores the data that is present one setup

time before the high-to-low enable transition.

The 3-State output buffers are designed to drive heavily loaded

3-State buses, MOS memories, or MOS microprocessors.

The active low output enable (OE) controls all eight 3-State buffers

independent of the latch operation. When OE is low, latched or

transparent data appears at the output.

When OE is high, the outputs are in high impedance “off ” state,

which means they will neither drive nor load the bus.

TYPE

TYPICAL

PROPAGATION

DELAY

TYPICAL SUPPLY

CURRENT

(TOTAL)

74F2373

4.5ns

35mA

ORDERING INFORMATION

ORDER CODE

DESCRIPTION

COMMERCIAL RANGE

DRAWING NUMBER

20-pin plastic DIP

N74F2373N

SOT146-1

20-pin plastic SOL

N74F2373D

SOT163-1

INPUT AND OUTPUT LOADING AND FAN OUT TABLE

PINS

DESCRIPTION

74F (U.L.)

HIGH/LOW

LOAD VALUE

HIGH/LOW

D0 - D7

Data inputs

1.0/1.0

20

µA/0.6mA

E

Enable input (active high)

1.0/1.0

20

µA/0.6mA

OE

Output enable inputs (active low)

1.0/1.0

20

µA/0.6mA

Q0 - Q7

3-State outputs

150/40

3.0mA/3.0mA

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

µA in the high state and 0.6mA in the low state.

PIN CONFIGURATION

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

OE

Q0

D0

D1

Q1

Q2

D2

D3

Q3

GND

Q7

D7

D6

Q6

Q5

D5

D4

Q4

E

SF00250

LOGIC SYMBOL

E

Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7

D0 D1 D2 D3 D4 D5 D6 D7

3

4

7

8

13

14

17

18

2

5

6

9

12

15

16

19

GND = Pin 10

11

1

OE

SF00251