DDU18

8-TAP, ECL-INTERFACED

FIXED DELAY LINE

(SERIES DDU18)

data

delay



3

FEATURES

PACKAGES

1

2

3

4

5

6

7

8

9

10

11

12

24

23

22

21

20

19

18

17

16

15

14

13

GND

N/C

T1

T2

T3

GND

GND

T4

T5

T6

T7

T8

IN

N/C

N/C

N/C

N/C

GND

VEE

N/C

N/C

N/C

N/C

GND

24

19

18

13

1

3

4

5

6

7

8

9

10

11

12

GND

T1

T2

T3

GND

GND

T4

T5

T6

T7

T8

IN

GND

VEE

GND

•

Eight equally spaced outputs

•

Fits in 400 mil 24-pin DIP socket

•

Input & outputs fully 100K-ECL interfaced & buffered

DDU18-xxC4

SMD

DDU18-xxMC4

Mil SMD

DDU18-xx

DIP

DDU18-xxM Military DIP

FUNCTIONAL DESCRIPTION

The DDU18-series device is a 8-tap digitally buffered delay line. The

signal input (IN) is reproduced at the outputs (T1-T8), shifted in time by an

amount determined by the device dash number (See Table). For dash

numbers less than 16, the total delay of the line is measured from T1 to

T8. The nominal tap-to-tap delay increment is given by one-seventh of the

total delay, and the inherent delay from IN to T1 is nominally 2.0ns. For dash numbers greater than or

equal to 16, the total delay of the line is measured from IN to T8. The nominal tap-to-tap delay increment is

given by one-eighth of this number.

PIN DESCRIPTIONS

IN

Signal Input

T1-T8 Tap Outputs

VEE

-5 Volts

GND

Ground

DASH NUMBER SPECIFICATIONS

Part

Number

Total

Delay (ns)

Delay Per

Tap (ns)

DDU18-4

3.5

± 1.0 *

0.5

± 0.3

DDU18-8

7.0

± 1.0 *

1.0

± 0.4

DDU18-12

10.5

± 1.0 *

1.5

± 0.4

DDU18-16

16

± 1.0

2.0

± 0.5

DDU18-20

20

± 1.0

2.5

± 1.0

DDU18-24

24

± 1.2

3.0

± 1.5

DDU18-32

32

± 1.6

4.0

± 2.0

DDU18-40

40

± 2.0

5.0

± 2.0

DDU18-48

48

± 2.4

6.0

± 2.0

DDU18-56

56

± 2.8

7.0

± 2.0

DDU18-64

64

± 3.2

8.0

± 2.0

DDU18-72

72

± 3.6

9.0

± 2.0

DDU18-80

80

± 4.0

10.0

± 2.5

DDU18-100

100

± 5.0

12.5

± 2.5

DDU18-120

120

± 6.0

15.0

± 3.0

DDU18-160

160

± 8.0

20.0

± 4.0

DDU18-200

200

± 10.0

25.0

± 5.0

* Total delay is referenced to first tap output

Input to first tap = 2.0ns

± 1ns

NOTE: Any dash number between 4 and 200

not shown is also available.

SERIES SPECIFICATIONS

•

Minimum input pulse width: 40% of total delay

•

Output rise time: 2ns typical

•

Supply voltage:

-5VDC

± 5%

•

Power dissipation: 500mw typical (no load)

•

Operating temperature: 0

° to 85° C

•

Temp. coefficient of total delay: 100 PPM/

°C

1/7

1/7

1/7

1/7

VCC

GND

IN

T1

T2

T3

T4

Functional diagram for dash numbers < 16

2.0ns

1/7

1/7

1/7

T5

T6

T7

T8

1/8

1/8

1/8

1/8

VCC

GND

IN

T1

T2

T3

T4

Functional diagram for dash numbers >= 16

1/8

1/8

1/8

T5

T6

T7

T8

1/8

2004 Data Delay Devices

Doc #97041

DATA DELAY DEVICES, INC.

1

5/5/04

3 Mt. Prospect Ave. Clifton, NJ 07013