have been designed to provide precise tapped delays with required driving and pick-off

circuitry contained in a single 16-pin DIP package compatible with Schottky T²L,

Advanced CMOS and Fast circuits. These logic delay modules are of hybrid

construction utilizing the proven technologies of active integrated circuitry and of passive

networks utilizing capacitive, inductive and resistive elements. The MTBF on these

modules, when calculated per MIL-HDBK-217 for a 50°C ground fixed environment, is in

excess of 1.3 million hours. Module design includes compensation for propagation

delays and incorporates internal termination at the output; no additional external

components are needed to obtain the desired delay.

The LDM-ACT is offered in twenty-six (26) delays from 10ns to 250ns, with each module

selected output tap without inversion. The delay modules are intended for use with

positive going pulses and are calibrated to the tolerances shown in the table on rising

edge delay; in applications using falling edge timing, it is recommended that a special

unit be calibrated for the specific application. Each module has the capability of driving

up to 20 T²L loads with a maximum of 10 loads on any one tap.

These "DIP Series" modules are packaged in a 16-pin DIP housing, molded of flame-

proof Diallyl Phthalate per ASTM D 5948, Type SDG-F, and are fully encapsulated in

epoxy resin. Leads meet the solderability requirements of MIL-STD-202, Method 208.

Corner standoffs on the housing provide positive standoff from the printed circuit board to

permit solder-fillet formation and flush cleaning of solder-flux residues for improved

*1. All measurements are made at 25°C.

2. Vcc supply voltage is maintained at 5.0V DC.

3. All units are tested using an ACT toggle-type positive input pulse and one ACT load at

the output being tested.

4. Input pulse width used is 600ns. Pulse period is 5000ns.

*Delays increase or decrease approximately 2% for an increase or decrease of 5% in

supply voltage.