DADD DDU18-48, DDU18-40M, DDU18-40, DDU18-4, DDU18-32M Datasheet

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DADD DDU18-48, DDU18-40M, DDU18-40, DDU18-4, DDU18-32M Datasheet

DDU18

8-TAP, ECL-INTERFACED FIXED DELAY LINE (SERIES DDU18)

data 3 ® delay

devices, inc.

FEATURES

PACKAGES

Eight equally spaced outputs

Fits in 400 mil 24-pin DIP socket

Input & outputs fully 100K-ECL interfaced & buffered

DDU18-xx DIP

DDU18-xxM Military DIP

GND

1

24

 

IN

GND

1

24

IN

 

N/C

2

23

N/C

 

 

 

 

 

 

 

 

 

 

 

 

T1

3

22

N/C

T1

 

3

 

 

 

T2

4

21

N/C

T2

4

 

 

 

T3

5

20

N/C

T3

 

5

 

 

 

GND

6

19

GND

GND

 

6

19

 

GND

GND

7

18

VEE

 

 

T4

8

17

N/C

 

 

GND

 

7

18

 

VEE

T5

9

16

N/C

 

 

T4

 

8

 

 

 

T6

10

15

N/C

 

 

 

 

T7

11

14

N/C

T5

 

9

 

 

 

 

 

 

 

T8

12

13

T10

T6

 

10

 

 

 

 

 

 

 

 

 

 

 

DDU18-xxC3

 

SMD

 

 

 

 

 

T7

 

11

 

 

 

 

 

 

 

 

 

T8

12

13

 

GND

DDU18-xxMC3

Mil SMD

 

 

 

 

 

 

 

 

 

 

FUNCTIONAL DESCRIPTION

PIN DESCRIPTIONS

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

IN

Signal Input

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

T1-T8

Tap Outputs

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

VEE

-5 Volts

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

GND

Ground

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.

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

2.0ns 1/7 1/7 1/7 1/7 1/7 1/7 1/7

VCC IN

T1

T2

T3

T4

T5

T6

T7 T8 GND

Functional diagram for dash numbers < 16

1/8 1/8 1/8 1/8 1/8 1/8 1/8 1/8

DASH NUMBER SPECIFICATIONS

Part

Total

Delay Per

Number

Delay (ns)

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

VCC IN T1

T2

T3

T4

T5

T6

T7 T8 GND

Functional diagram for dash numbers >= 16

*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.

©1997 Data Delay Devices

Doc #97041

DATA DELAY DEVICES, INC.

1

12/12/97

3 Mt. Prospect Ave. Clifton, NJ 07013

DDU18

APPLICATION NOTES

HIGH FREQUENCY RESPONSE

The DDU18 tolerances are guaranteed for input pulse widths and periods greater than those specified in the test conditions. Although the device will function properly for pulse widths as small as 40% of the total delay and periods as small as 80% of the total delay (for a symmetric input), the delays may deviate from their values at low frequency. However, for a given input condition, the deviation will be repeatable from pulse to pulse. Contact technical support at Data

Delay Devices if your application requires device testing at a specific input condition.

POWER SUPPLY BYPASSING

The DDU18 relies on a stable power supply to produce repeatable delays within the stated tolerances. A 0.1uf capacitor from VEE to GND, located as close as possible to the VEE pin, is recommended. A wide VEE trace and a clean ground plane should be used.

DEVICE SPECIFICATIONS

TABLE 1: ABSOLUTE MAXIMUM RATINGS

PARAMETER

SYMBOL

MIN

MAX

UNITS

NOTES

DC Supply Voltage

VEE

-7.0

0.3

V

 

Input Pin Voltage

VIN

VEE - 0.3

0.3

V

 

Storage Temperature

TSTRG

-55

150

C

 

Lead Temperature

TLEAD

 

300

C

10 sec

TABLE 2: DC ELECTRICAL CHARACTERISTICS

(0C to 85C)

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

NOTES

High Level Output Voltage

VOH

-1.025

 

-0.880

V

VIH = MAX,50Ω to -2V

Low Level Output Voltage

VOL

-1.810

 

-1.620

V

VIL = MIN, 50Ω to -2V

High Level Input Voltage

VIH

-1.165

 

-0.880

V

 

Low Level Input Voltage

VIL

-1.810

 

-1.475

V

 

High Level Input Current

IIH

 

 

340

μA

VIH = MAX

Low Level Input Current

IIL

0.5

 

 

μA

VIL = MIN

Doc #97041

DATA DELAY DEVICES, INC.

2

12/12/97

Tel: 973-773-2299 Fax: 973-773-9672 http://www.datadelay.com

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