Philips GTL2000 Datasheet

INTEGRATED CIRCUITS

GTL2000

22-bit GTL processor voltage clamp

Product specification
Supersedes data of 1999 Apr 05

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2000 Jan 25

Philips Semiconductors Product specification

GTL200022-bit GTL processor voltage clamp

FEA TURES

•Direct interface with TTL level

•6.5Ω ON-state connection between port S

DESCRIPTION

The GTL2000 provides twenty-two bits of high-speed voltage
clamps. The low ON-state resistance of the clamp allows
connections to be made with minimal propagation delay.

The device is organized as one 22-bit voltage clamp. When S or D
is low the clamp is in the ON–state and a low resistance connection
exists between the S and D ports. When S port and D port are high,
the clamp is in the OFF-state and a very high impedance exists
between the S and D ports. When the D port is high, the voltage on
the S port is clamped to the applied reference voltage on the GREF
port.

FUNCTION TABLE

G

REF

D

REF

H H 0 V off X X
H H V
H H V

L L V
L L 0 – V

H = High voltage level
L = Low voltage level
X = Don’t Care

NOTES:

1. The output is not pulled up or pulled down.

2. The output is pulled up to V

3. The driven output can be S
follows the input low.

4. G

must be at least 1.5 V higher than S

REF

operation.

4

S

REF

Switch

TT
TT
TT

on H V

nearly off V

on L L
off X X

TT

through an external resistor.

CC

or Dn; the output of drivn input

n

and D

n

n

Driven

Input

TT

for proper switch

REF

Output of

Driven Input

1

TT

2

H

3

PIN CONFIGURATION

GND

1

S

2

REF

S

3

1

S

4

2

5

S

3

6

S

4

7

S

5

S

8

6

S

9

7

S

10

8

S

11

9

12

S

10

13

S

11

S

14

12

S

15

13

S

16

14

S

17

15

S

18

16

S

17

19

S

20

18

S

21

19

S

22

20

S

23

21

S

24

22

48
47
46

45
44

43
42
41
40

39
38
37
36
35
34
33
32
31
30
29
28

27

26

25

SA00521

G

REF

D

REF

D

1

D

2

D

3

D

4

D

5

D

6

D

7

D

8

D

9

D

10

D

11

D

12

D

13

D

14

D

15

D

16

D

17

D

18

D

19

D

20

D

21

D

22

QUICK REFERENCE DA TA

SYMBOL PARAMETER

Propagation delay
Sn to Dn

Channel capacitance (OFF-state) VS = 1.5 V 7.5 pF

C

t

PLH

OFF

V

= 3.3 V; V

DD1

V

= 1.5 V; unloaded

REF

CONDITIONS

T

= 25°C; GND = 0V

amb

= 2.5 V;

DD2

TYPICAL UNIT

1.5 ns

ORDERING INFORMATION

PACKAGES TEMPERATURE RANGE ORDER CODE DWG NUMBER

48-Pin Plastic SSOP Type II 0°C to +85°C GTL2000 DL SOT370–1

2000 Jan 25 853-2154 23030

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