• Low-power CMOS
-Commercial - 45mA (max.)
-Military - 55mA (max.)
-A versions meet standard speeds
-8 versions are 20% speed upgrades
• 9-Deep stack
-Accommodates nested loops and subroutines
-Infinitely expandable in 4-bit increments
• Available in 28-pin DIP/LCC (IDT39C09) and 20-pin
• Pin-compatible, functional enhancement for all versions of
• Military product available 100% screened to MIL-STD-883,
The IDT39C09/11 devices are high-speed, 4-bit address
sequencers intended for controlling the sequence of micro-
instructions located in the microprogram memory. They are fully
cascadable and can be expanded to any increment of 4 bits.
The IDT39C09s can select an address from any four sources:
1) external direct inputs (D); 2) external data from the R inputs,
stored in an internal register; 3) a 9-word deep push-pop stack; or
4) a program counter register. Also included in the stack are
additional control functions which efficiently execute nested
subroutine linkage. Each output can be ORed with an external
input for conditional skip or branch instructions. A ZERO input
line forces the outputs to all zeroes. All outputs are three-state
and are controlled by the OE (Output Enable) pin.
The IDT39C11s operate identically to the IDT39C09s except
the four OR outputs are removed and the D and R inputs are tied
together. They are fabricated using CEMOS", a single poly,
double metal CMOS technology designed for high-performance
and high-reliability. Military product is 100% screened to MIL-
STD-883, Class 8, making them ideally suited to military temper-
ature applications demanding the highest level of performance
FUNCTIONAL BLOCK DIAGRAM := _~(~:!:~CO! ~~!l_J
i i E - - iI,----<. .
Yo Y, Ya Y3 Cn
Nole 1: D and R connecled on IDT39C11 only.
CEMOS and MICROSLICE are trademarks of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
C1986 Integrated Device Technology, Inc.
Printed in the U.S.A.