DDU18
8-TAP, ECL-INTERFACED
FIXED DELAY LINE
(SERIES DDU18)
data
delay
devices,
inc.
3
FEATURES PACKAGES
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
GND
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
Eight equally spaced outputs
Fits in 400 mil 24-pin DIP socket
Input & outputs fully 100K-ECL interfaced & buffered
DDU18-xxC4 SMD
DDU18-xxMC4 Mil
SMD
DDU18-xx
DIP
DDU18-xxM Military DIP
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.
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.
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
GND
IN
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
GND
IN
T1
T2
T3
T4
Functional diagram for dash numbers >= 16
1/8
1/8
1/8
T5
T6
T7
T8
1/8
2004 Data Delay Devices
Doc #97041
DATA DELAY DEVICES, INC.
1
5/5/04
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
V
EE
-7.0 0.3 V
Input Pin Voltage
V
IN
V
EE
- 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 V
IH
= MAX,50
to -2V
Low Level Output Voltage
V
OL
-1.810 -1.620 V V
IL
= MIN, 50
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
A
V
IH
= MAX
Low Level Input Current
I
IL
0.5
A
V
IL
= MIN
Doc #97041
DATA DELAY DEVICES, INC.
2
5/5/04
Tel: 973-773-2299 Fax: 973-773-9672 http://www.datadelay.com
DDU18
PACKAGE DIMENSIONS
19 18
DDU18-xx (Commercial DIP)
DDU18-xxM (Military DIP)
.130
.030
1.300 MAX.
1
4
6
.300
MAX.
.018 TYP.
.530
MAX.
.400
TYP.
.012 TYP.
1.100 TYP.
.015
TYP.
.100 TYP.
12
11
13
24
5
3
7
8
9 10
DDU18-xxC4 (Commercial SMD)
DDU18-xxMC4 (Military SMD)
1.280
.020
.882
.005
.020 TYP.
.040 TYP.
.100
.090
1.100
.280
MAX.
.590
MAX.
.010
.002
.050
.010
.710
.005
.007
.005
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Doc #97041
DATA DELAY DEVICES, INC.
3
5/5/04
3 Mt. Prospect Ave. Clifton, NJ 07013
DDU18
DELAY LINE AUTOMATED TESTING
TEST CONDITIONS
INPUT:
OUTPUT:
Ambient Temperature: 25
o
C
3
o
C
Load: 50
to -2V
Supply Voltage (Vcc): -5.0V
0.1V
C
load
: 5pf
10%
Input Pulse:
Standard 10KH ECL
Threshold: (V
OH
+ V
OL
) / 2
levels
(Rising & Falling)
Source Impedance: 50
Max.
Rise/Fall Time:
2.0 ns Max. (measured
between 20% and 80%)
Pulse Width: PW
IN
= 1.5 x Total Delay
Period: PER
IN
= 10 x Total Delay
NOTE: The above conditions are for test only and do not in any way restrict the operation of the device.
T1
OUT
TRIG
IN
REF
TRIG
Test Setup
DEVICE UNDER
TEST (DUT)
OSCILLOSCOPE
PULSE
GENERATOR
IN
T2
T3
T4
T5
T6
T7
T8
Timing Diagram For Testing
D
RISE
D
FALL
PER
IN
PW
IN
T
RISE
T
FALL
20%
20%
50%
50%
80%
80%
50%
50%
V
IH
V
IL
V
OH
V
OL
INPUT
SIGNAL
OUTPUT
SIGNAL
Doc #97041
DATA DELAY DEVICES, INC.
4
5/5/04
Tel: 973-773-2299 Fax: 973-773-9672 http://www.datadelay.com
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