DDU18
Ò
8-TAP, ECL-INTERFACED
FIXED DELAY LINE
(SERIES DDU18)
data
delay
3
devices, inc.
FEATURES
PACKAGES
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
16
15
14
13
IN
GND
N/C
T1
T2
T3
GND
GND
T4
T5
T6
IN
GND
24
1
·
·
·
Eight equally spaced outputs
Fits in 400 mil 24-pin DIP socket
Input & outputs fully 100K-ECL interfaced & buffered
N/C
N/C
N/C
N/C
GND
VEE
N/C
N/C
N/C
N/C
T10
T1
T2
3
4
T3
5
GND
VEE
GND
GND
T4
6
19
18
9
7
10
11
12
8
T7
T8
T5
9
T6
10
11
12
DDU18-xx
DDU18-xxM Military DIP
DIP
T7
DDU18-xxC3
DDU18-xxMC3 Mil SMD
SMD
GND
T8
13
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.
SERIES SPECIFICATIONS
DASH NUMBER SPECIFICATIONS
Part
Number
DDU18-4
DDU18-8
Total
Delay (ns)
3.5 ± 1.0 *
7.0 ± 1.0 *
10.5 ± 1.0 *
16 ± 1.0
20 ± 1.0
24 ± 1.2
32 ± 1.6
40 ± 2.0
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
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
2.0ns
1/7
1/7
1/7
1/7
1/7
1/7
1/7
48 ± 2.4
56 ± 2.8
64 ± 3.2
72 ± 3.6
VCC IN
T1
T2
T3
T4
T5
T6
T7
T8 GND
80 ± 4.0
100 ± 5.0
120 ± 6.0
160 ± 8.0
200 ± 10.0
Functional diagram for dash numbers < 16
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
Ó1997 Data Delay Devices
Doc #97041
DATA DELAY DEVICES, INC.
3 Mt. Prospect Ave. Clifton, NJ 07013
1
12/12/97
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