ddu 37f 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 t 2 l fan-out capability ) resolution: as low as 0.12ns minimum delay (t d0 ) : 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 t d 0 and t d 0 + t d var , where t d var 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 nc out vcc 1.640 .100 .200 .100 .060 .060 data delay devices, inc. 3 ddu37f gnd in out nc vcc ddu37f-xx (commercial) DDU37F-XXM (military) xx = dash number pin descriptions in signal i nput out fixed output vcc +5v gnd ground nc no connection dash number specifications part number t dvar ( 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 2001 data delay devices
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 ddu 37 f 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 ddu 37 f 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 v cc -0.3 7.0 v input pin voltage v in -0.3 v dd +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 70c, 4.75v to 5.25v) parameter symbol min typ max units notes high level output voltage v oh 2.5 3.4 v v cc = min, i oh = max v ih = min, v il = max low level output voltage v ol 0.35 0.5 v v cc = min, i ol = max v ih = min, v il = max high level output current i oh -1.0 ma low level output current i ol 20.0 ma high level input voltage v ih 2.0 v low level input voltage v il 0.8 v input clamp voltage v ik -1.2 v v cc = min, i i = i ik input current at maximum input voltage i ihh 0.1 ma v cc = max, v i = 7.0v high level input current i ih 20 m a v cc = max, v i = 2.7v low level input current i il -0.6 ma v cc = max, v i = 0.5v short-circuit output current i os -60 -150 ma v cc = max output high fan-out 25 unit output low fan-out 12.5 load
ddu 37f 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: 25 o c 3 o c load: 1 fast-ttl gate supply voltage ( vcc): 5.0v 0.1v c load : 5pf 10% input pulse: high = 3.0v 0.1v threshold: 1.5v (rising & falling) low = 0.0v 0.1v source impedance: 50 w max. rise/fall time: 3.0 ns max. ( measured between 0.6v and 2.4v ) 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. in out out trig in trig test setup device under test (dut) oscilloscope pulse generator timing diagram for testing d rise d fall per in pw in t rise t fall 0.6 0.6 1.5 1.5 2.4 2.4 1.5 1.5 v ih v il v oh v ol input signal output signal
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