scope:

This drawing describes device requirements for class B microcircuits in accordance with 1.2.1 of MIL-STD-883, "Provisions for the use of MIL-STD-883 in conjunction with compliant non-JAN devices".

The complete PIN shall be as shown in the following example:

The device type(s) shall identify the circuit function as follows:

Device type Generic number Circuit function 01 88C681, 2692 Dual asynchronous receiver/transmitter (DUART) 02 88C681, 2692 Dual asynchronous receiver/transmitter (DUART) with 7-bit input and 8-bit output ports 03 68C681 Dual asynchronous receiver/transmitter (DUART)

The case outline(s) shall be as designated in appendix C of MIL-M-38510, and as follows:

Outline letter Case outline Q D-5 (40-lead, 2.096" × .620" × .225"), dual-in-line package X D-10 (28-lead, 1.490" × .610" × .232"), dual-in-line package U C-5 (44-terminal, .662" × .662" × .120"), square chip carrier package Y See figure 1 (52-lead, 1.330" × .660" × .100"), flat package

Supply voltage range - - - - - - - - - - - - - - - - - - −0.5 V dc to +7.0 V dc Storage temperature range- - - - - - - - - - - - - - - - −65°C to +150°C Maximum power dissipation (P_D) - - - - - - - - - - - - - 1 W Lead temperature (soldering, 5 seconds)- - - - - - - - - +300°C Junction temperature (T_J)- - - - - - - - - - - - - - - - +175°C Thermal resistance, junction-to-case (Θ_JC): Cases X, Q, U - - - - - - - - - - - - - - - - - - - See MIL-M-38510, appendix C Case Y- - - - - - - - - - - - - - - - - - - - - - - 20°C/W

Supply voltage (V_CC) - - - - - - - - - - - - - - - - - - 4.5 V dc to 5.5 V dc High level input voltage (V_IH): Logic inputs - - - - - - - - - - - - - - - - - - - 2.0 V dc X1/CLK input- - - - - - - - - - - - - - - - - - - - 4.0 V dc Low level input voltage (logic inputs)(V_IL)- - - - - - - 0.8 V dc Maximum high level output current (I_OH)- - - - - - - - - −400 µA Maximum low level output current (I_OL) - - - - - - - - - 2.4 mA Case operating temperature range (T_C)- - - - - - - - - - −55°C to +125°C

intended Use: