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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 (R) 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 T10
DDU18-xx DDU18-xxM
DIP Military DIP
T7 T8
GND
DDU18-xxC3 DDU18-xxMC3
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
(c)1997 Data Delay Devices
NOTE: Any dash number between 4 and 200 not shown is also available.
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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 VEE VIN TSTRG TLEAD MIN -7.0 VEE - 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 VOH VOL VIH VIL IIH IIL 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 A A NOTES VIH = MAX,50 to -2V VIL = MIN, 50 to -2V
VIH = MAX VIL = MIN
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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)
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DATA DELAY DEVICES, INC.
3 Mt. Prospect Ave. Clifton, NJ 07013
3
DDU18
DELAY LINE AUTOMATED TESTING
TEST CONDITIONS
INPUT: Ambient Temperature: 25oC 3oC Supply Voltage (Vcc): -5.0V 0.1V Input Pulse: Standard 10KH ECL levels Source Impedance: 50 Max. Rise/Fall Time: 2.0 ns Max. (measured between 20% and 80%) Pulse Width: PWIN = 1.5 x Total Delay Period: PERIN = 10 x Total Delay OUTPUT: Load: Cload: Threshold: 50 to -2V 5pf 10% (VOH + VOL) / 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
PERIN PWIN TRISE INPUT SIGNAL
80% 50% 20%
TFALL VIH
80% 50% 20%
VIL TFALL
TRISE OUTPUT SIGNAL VOH
50%
50%
VOL
Timing Diagram For Testing
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