Philips Semiconductors

Product specification

74F537

1-of-10 decoder (3-State)

1

1989 Jan 20

853–0873 95586

DESCRIPTION

The 74F537 is a one-of-ten decoder/demultiplexer with four active

High BCD inputs and ten mutually exclusive outputs. A Polarity

control (P) input determines whether the outputs are active Low or

active High. The 74F537 has 3-State outputs and a High signal on

the Output Enables (OE) input forces all outputs to the high

impedance state. Two input Enables, active High (E1) and active

Low (E0), are available for demultiplexing data to the selected

output in either non-inverted or inverted form. Input codes greater

than BCD nine causes all outputs to go to the inactive state (i.e.,

same polarity as the P input).

TYPE

TYPICAL

PROPAGATION DELAY

TYPICAL SUPPLY

CURRENT

(TOTAL)

74F537

9ns

44mA

ORDERING INFORMATION

DESCRIPTION

COMMERCIAL RANGE

20-Pin Plastic DIP

N74F537N

20-Pin Plastic SOL

N74F537D

PIN CONFIGURATION

20

19

18

17

16

15

14

13

12

10

11

9

8

7

6

5

4

3

2

1

VCC

Q3

Q4

A3

Q9

Q8

Q7

Q2

Q1

Q0

A0

A1

Q5

Q6

GND

E0

E1

OE

P

SF01004

A2

INPUT AND OUTPUT LOADING AND FAN-OUT TABLE

PINS

DESCRIPTION

74F(U.L.)

HIGH/LOW

LOAD VALUE

HIGH/LOW

A0 - A3

Data inputs

1.0/1.0

20

µA/0.6mA

E0

Enable input (active Low)

1.0/1.0

20

µA/0.6mA

E1

Enable input (active High)

1.0/1.0

20

µA/0.6mA

P

Polarity control input

1.0/1.0

20

µA/0.6mA

OE

Output Enable input

1.0/1.0

20

µA/0.6mA

Q0 - Q9

Data outputs

150/40

3.0mA/24mA

NOTE: One (1.0) FAST Unit Load is defined as: 20

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

LOGIC SYMBOL

67

16

VCC = Pin 20

GND = Pin 10

321

19

18

89

11

Q0

Q1

Q2

Q3

Q4 Q5

Q6

Q7

P

E0

E1

OE

4

15

14

5

A0

A1

A2

SF01005

17

A3

12

13

Q8

Q9

LOGIC SYMBOL (IEEE/IEC)

6

7

17

13

19

DMUX

1

2

3

5

0,10

0

3

10G

0

9

SF01006

11

9

8

18

1,10

2,10

3,10

4,10

5,10

6,10

7,10

14

15

4

&

&

N10

8,10

9,10

13

12

EN