DDU37F
Doc #01016 DATA DELAY DEVICES, INC. 1
11/12/01 3 Mt. Prospect Ave. Clifton, NJ 07013
MECHANICALLY VARIABLE
TTL DELAY LINE
(SERIES DDU37F)
FEATURES PACKAGES
• Ideal for “Set and Forget” applications
• Multi-turn adjustment screw (approx. 40 turns)
• Input & output fully TTL interfaced & buffered
(10 T2L fan-out capability)
• Resolution: As low as 0.12ns
• Minimum delay (TD0): 6ns typical
• Output rise time: 2ns typical
• Min. input pulse width: 20% of maximum delay
• Power dissipation: 230mW maximum
• Operating temperature: 0° to 70°C (Commercial)
-55° to 125°C (Military)
• Temperature coefficient: 100 PPM/°C
FUNCTIONAL DESCRIPTION
The DDU37F-series device is a mechanically variable, FAST-TTL interfaced
delay line. The signal input (IN) is reproduced at the tap output (OUT), shifted
by an amount which can be adjusted between TD0 and TD0+ TDVAR, where
TDVAR is given by the device dash number (See Table). The device operates
from a single 5V supply and is TTL interfaced, capable of driving up to 10
TTL loads.
SERIES SPECIFICATIONS
Functional Diagram
GND
IN OUT
.565
MAX
1.750
.285
.020
Package Dimensions
.187
.125
.200
MIN
.430
.100
IN GND
NCOUTVCC
1.640
.100
.200
.100
.060
.060
data
delay
devices, inc.
3
DDU37F
GNDIN
OUT NCVCC
DDU37F-xx (Commercial)
DDU37F-xxM (Military)
xx = Dash number
PIN DESCRIPTIONS
IN Signal Input
OUT Fixed Output
VCC +5V
GND Ground
NC No connection
DASH NUMBER
SPECIFICATIONS
Part
Number TDVAR
(ns)
DDU37F-25 15
DDU37F-30 20
DDU37F-40 30
DDU37F-50 40
DDU37F-60 50
DDU37F-70 60
DDU37F-80 70
DDU37F-100 90
DDU37F-120 100
DDU37F-150 130
DDU37F-200 180
Note: Other delay times
available on request
DDU37F
Doc #01016 DATA DELAY DEVICES, INC. 2
11/12/01 Tel: 973-773-2299 Fax: 973-773-9672 http://www.datadelay.com
APPLICATION NOTES
HIGH FREQUENCY RESPONSE
The DDU37F 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 20% of the total delay and periods as
small as 40% 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 DDU37F relies on a stable power supply to
produce repeatable delays within the stated
tolerances. A 0.1uf capacitor from VCC to GND,
located as close as possible to the VCC pin, is
recommended. A wide VCC 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 VCC -0.3 7.0 V
Input Pin Voltage VIN -0.3 VDD+0.3 V
Storage Temperature TSTRG -55 150 C
Lead Temperature TLEAD 300 C10 sec
TABLE 2: DC ELECTRICAL CHARACTERISTICS
(0C to 70C, 4.75V to 5.25V)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
High Level Output Voltage VOH 2.5 3.4 V VCC = MIN, IOH = MAX
VIH = MIN, VIL = MAX
Low Level Output Voltage VOL 0.35 0.5 V VCC = MIN, IOL = MAX
VIH = MIN, VIL = MAX
High Level Output Current IOH -1.0 mA
Low Level Output Current IOL 20.0 mA
High Level Input Voltage VIH 2.0 V
Low Level Input Voltage VIL 0.8 V
Input Clamp Voltage VIK -1.2 V VCC = MIN, II = IIK
Input Current at Maximum
Input Voltage IIHH 0.1 mA VCC = MAX, VI = 7.0V
High Level Input Current IIH 20 µAVCC = MAX, VI = 2.7V
Low Level Input Current IIL -0.6 mA VCC = MAX, VI = 0.5V
Short-circuit Output Current IOS -60 -150 mA VCC = MAX
Output High Fan-out 25 Unit
Output Low Fan-out 12.5 Load
DDU37F
Doc #01016 DATA DELAY DEVICES, INC. 3
11/12/01 3 Mt. Prospect Ave. Clifton, NJ 07013
DELAY LINE AUTOMATED TESTING
TEST CONDITIONS
INPUT: OUTPUT:
Ambient Temperature: 25oC ± 3oCLoad: 1 FAST-TTL Gate
Supply Voltage (Vcc): 5.0V ± 0.1V Cload:5pf ± 10%
Input Pulse: High = 3.0V ± 0.1V Threshold: 1.5V (Rising & Falling)
Low = 0.0V ± 0.1V
Source Impedance: 50Ω Max.
Rise/Fall Time: 3.0 ns Max. (measured
between 0.6V and 2.4V )
Pulse Width: PWIN = 1.5 x Total Delay
Period: PERIN = 10 x Total Delay
NOTE: The above conditions are for test only and do not in any way restrict the operation of the device.
IN
OUT
OUT
TRIG
IN
TRIG
Test Setup
DEVICE UNDER
TEST (DUT)
OSCILLOSCOPE
PULSE
GENERATOR
Timing Diagram For Testing
DRISE DFALL
PERIN
PWIN
TRISE TFALL
0.6
0.6
1.5
1.5
2.4
2.4
1.5
1.5
VIH VIL
VOH VOL
INPUT
SIGNAL
OUTPUT
SIGNAL