DDU18
8-TAP, ECL-INTERFACED
FIXED DELAY LINE
(SERIES DDU18)
3
delay
devices, inc.
FEATURES
PACKAGES
1
24
23
22
21
20
19
18
17
16
15
14
IN
GND
N/C
T1
GND
IN
24
1
•
•
•
Eight equally spaced outputs
2
N/C
N/C
N/C
N/C
GND
VEE
N/C
N/C
N/C
N/C
GND
3
Fits in 400 mil 24-pin DIP socket
T1
T2
T3
GND
GND
T4
T5
T6
T7
T8
3
4
5
6
7
8
9
10
11
12
4
T2
5
T3
Input & outputs fully 100K-ECL interfaced & buffered
6
GND
GND
T4
7
GND
VEE
19
18
8
9
T5
10
11
T6
T7
T8
DDU18-xx
DIP
DDU18-xxC4
SMD
GND
13
DDU18-xxMC4 Mil SMD
DDU18-xxM Military DIP
FUNCTIONAL DESCRIPTION
PIN DESCRIPTIONS
The DDU18-series device is a 8-tap digitally buffered delay line. The
IN
T1-T8 Tap Outputs
VEE -5 Volts
GND Ground
Signal Input
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.
DASH NUMBER SPECIFICATIONS
SERIES SPECIFICATIONS
Part
Total
Delay (ns)
3.5 ± 1.0 *
7.0 ± 1.0 *
10.5 ± 1.0 *
16 ± 1.0
Delay Per
Tap (ns)
0.5 ± 0.3
1.0 ± 0.4
1.5 ± 0.4
2.0 ± 0.5
2.5 ± 1.0
3.0 ± 1.5
4.0 ± 2.0
5.0 ± 2.0
6.0 ± 2.0
7.0 ± 2.0
8.0 ± 2.0
9.0 ± 2.0
10.0 ± 2.5
12.5 ± 2.5
15.0 ± 3.0
20.0 ± 4.0
25.0 ± 5.0
•
•
•
•
•
•
Minimum input pulse width: 40% of total delay
Output rise time: 2ns typical
Number
DDU18-4
DDU18-8
Supply voltage: -5VDC ± 5%
Power dissipation: 500mw typical (no load)
Operating temperature: 0° to 85° C
Temp. coefficient of total delay: 100 PPM/°C
DDU18-12
DDU18-16
DDU18-20
DDU18-24
DDU18-32
DDU18-40
DDU18-48
DDU18-56
DDU18-64
DDU18-72
DDU18-80
DDU18-100
DDU18-120
DDU18-160
DDU18-200
20 ± 1.0
24 ± 1.2
32 ± 1.6
2.0ns
1/7
1/7
1/7
1/7
1/7
1/7
1/7
40 ± 2.0
48 ± 2.4
56 ± 2.8
64 ± 3.2
VCC IN
T1
T2
T3
T4
T5
T6
T7
T8 GND
72 ± 3.6
80 ± 4.0
Functional diagram for dash numbers < 16
100 ± 5.0
120 ± 6.0
160 ± 8.0
200 ± 10.0
1/8
1/8
1/8
1/8
1/8
1/8
1/8
1/8
* Total delay is referenced to first tap output
Input to first tap = 2.0ns ± 1ns
VCC IN
T1
T2
T3
T4
T5
T6
T7
T8 GND
NOTE: Any dash number between 4 and 200
not shown is also available.
Functional diagram for dash numbers >= 16
2004 Data Delay Devices
Doc #97041
5/5/04
DATA DELAY DEVICES, INC.
3 Mt. Prospect Ave. Clifton, NJ 07013
1