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

DDU18

Doc #97041 DATA DELAY DEVICES, INC. 1

12/12/97 3 Mt. Prospect Ave. Clifton, NJ 07013

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

FEATURES PACKAGES

• Eight equally spaced outputs

• Fits in 400 mil 24-pin DIP socket

• Input & outputs fully 100K-ECL interfaced & buffered

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.

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 GNDIN 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 GNDIN T1 T2 T3 T4

Functional diagram for dash numbers >= 16

1/8 1/8 1/8

T5 T6 T7 T8

1/8

1997 Data Delay Devices

data

delay
devices, inc.



3

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

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
T10

DDU18-xx DIP
DDU18-xxM Military DIP

DDU18-xxC3 SMD
DDU18-xxMC3 Mil SMD

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.

DDU18

Doc #97041 DATA DELAY DEVICES, INC. 2

12/12/97 Tel: [phone] Fax: [phone] http://www.datadelay.com

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 V

EE

-7.0 0.3 V

Input Pin Voltage V

IN

VEE - 0.3 0.3 V

Storage Temperature T

STRG

-55 150 C

Lead Temperature T

LEAD

300 C 10 sec

TABLE 2: DC ELECTRICAL CHARACTERISTICS

(0C to 85C)

PARAMETER SYMBOL MIN TYP MAX UNITS NOTES

High Level Output Voltage V

OH

-1.025 -0.880 V

VIH = MAX,50Ω to -2V

Low Level Output Voltage V

OL

-1.810 -1.620 V

VIL = MIN, 50Ω to -2V

High Level Input Voltage V

IH

-1.165 -0.880 V

Low Level Input Voltage V

IL

-1.810 -1.475 V

High Level Input Current I

IH

340

µA

VIH = MAX

Low Level Input Current I

IL

0.5

µA

VIL = MIN