DADD DDU18-48, DDU18-40M, DDU18-40, DDU18-4, DDU18-32M Datasheet
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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: 973-773-2299 Fax: 973-773-9672 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
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