DDU18
8-TAP, ECL-INTERFACED
FIXED DELAY LINE
(SERIES DDU18)
FEATURES
•
•
•
Eight equally spaced outputs
Fits in 400 mil 24-pin DIP socket
Input & outputs fully 100K-ECL interfaced & buffered
GND
T1
T2
T3
GND
GND
T4
T5
T6
1
3
4
5
6
7
8
9
10
11
12
13
19
18
24
data
3
delay
devices,
inc.
PACKAGES
IN
GND
VEE
GND
N/C
T1
T2
T3
GND
GND
T4
T5
T6
T7
T8
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
IN
N/C
N/C
N/C
N/C
GND
VEE
N/C
N/C
N/C
N/C
GND
DDU18-xx
DDU18-xxM
DIP
Military DIP
T7
T8
GND
DDU18-xxC4
DDU18-xxMC4
SMD
Mil SMD
FUNCTIONAL DESCRIPTION
PIN DESCRIPTIONS
The DDU18-series device is a 8-tap digitally buffered delay line. The
IN
Signal Input
signal input (IN) is reproduced at the outputs (T1-T8), shifted in time by an
T1-T8 Tap Outputs
amount determined by the device dash number (See Table). For dash
VEE
-5 Volts
numbers less than 16, the total delay of the line is measured from T1 to
GND Ground
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
2.0ns
1/7
1/7
1/7
1/7
1/7
1/7
1/7
DASH NUMBER SPECIFICATIONS
Part
Number
DDU18-4
DDU18-8
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
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
48
±
2.4
56
±
2.8
64
±
3.2
72
±
3.6
80
±
4.0
100
±
5.0
120
±
6.0
160
±
8.0
200
±
10.0
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
VCC IN
T1
T2
T3
T4
T5
T6
T7
T8 GND
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
Functional diagram for dash numbers >= 16
2004
Data Delay Devices
NOTE: Any dash number between 4 and 200
not shown is also available.
Doc #97041
5/5/04
DATA DELAY DEVICES, INC.
3 Mt. Prospect Ave. Clifton, NJ 07013
1
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
DC Supply Voltage
Input Pin Voltage
Storage Temperature
Lead Temperature
SYMBOL
V
EE
V
IN
T
STRG
T
LEAD
MIN
-7.0
V
EE
- 0.3
-55
MAX
0.3
0.3
150
300
UNITS
V
V
C
C
NOTES
10 sec
TABLE 2: DC ELECTRICAL CHARACTERISTICS
(0C to 85C)
PARAMETER
High Level Output Voltage
Low Level Output Voltage
High Level Input Voltage
Low Level Input Voltage
High Level Input Current
Low Level Input Current
SYMBOL
V
OH
V
OL
V
IH
V
IL
I
IH
I
IL
MIN
-1.025
-1.810
-1.165
-1.810
0.5
TYP
MAX
-0.880
-1.620
-0.880
-1.475
340
UNITS
V
V
V
V
µA
µA
NOTES
V
IH
= MAX,50Ω to -2V
V
IL
= MIN, 50Ω to -2V
V
IH
= MAX
V
IL
= MIN
Doc #97041
5/5/04
DATA DELAY DEVICES, INC.
Tel: 973-773-2299
Fax: 973-773-9672
http://www.datadelay.com
2
DDU18
PACKAGE DIMENSIONS
24
19 18
13
.530
MAX.
1
3
4
5
6
7
8
9 10 11 12
1.300 MAX.
.015 .300
TYP. MAX.
.130
±.030
.018 TYP.
1.100 TYP.
.100 TYP.
.012 TYP.
.400
TYP.
DDU18-xx (Commercial DIP)
DDU18-xxM (Military DIP)
.020 TYP.
.040 TYP.
.010±.002
24 23 22 21 20 19 18 17 16 15 14 13
.710 .590
±
.005 MAX.
.882
±
.005
.007
±
.005
1
2
3
4
5
6
7
8
9
10 11 12
.090
1.100
1.280±.020
.100
.280
MAX.
.050
±
.010
DDU18-xxC4 (Commercial SMD)
DDU18-xxMC4 (Military SMD)
Doc #97041
5/5/04
DATA DELAY DEVICES, INC.
3 Mt. Prospect Ave. Clifton, NJ 07013
3
DDU18
DELAY LINE AUTOMATED TESTING
TEST CONDITIONS
INPUT:
Ambient Temperature:
25
o
C
±
3
o
C
Supply Voltage (Vcc):
-5.0V
±
0.1V
Input Pulse:
Standard 10KH ECL
levels
Source Impedance:
50Ω 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
OUTPUT:
Load:
C
load
:
Threshold:
50Ω to -2V
5pf
±
10%
(V
OH
+ V
OL
) / 2
(Rising & Falling)
NOTE:
The above conditions are for test only and do not in any way restrict the operation of the device.
T1
PULSE
GENERATOR
OUT
TRIG
DEVICE UNDER
TEST (DUT)
IN
T2
T3
T4
T5
T6
T7
T8
REF
IN
TRIG
OSCILLOSCOPE
Test Setup
PER
IN
PW
IN
T
RISE
INPUT
SIGNAL
80%
50%
20%
T
FALL
V
IH
80%
50%
20%
V
IL
D
FALL
D
RISE
OUTPUT
SIGNAL
50%
V
OH
50%
V
OL
Timing Diagram For Testing
Doc #97041
5/5/04
DATA DELAY DEVICES, INC.
Tel: 973-773-2299
Fax: 973-773-9672
http://www.datadelay.com
4
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