AM27S25A/B3A

Datasheet Am27S25/27S25A/27S25SA 4096-Bit (512x8) Bipolar Registered PROM with Preset and Clear Inputs The Am27S25 (512 words by 8 bits) is a fully decoded, Schottky array, TTL Programmable ReadOnly Memory (PROM), incorporating D-type master-slave data registers on chip. This device has three-state outputs compatible with low-power Schottky bus standards capable of satisfying the requirements of a variety of microprogrammable controls and state machines. This device contains an 8-bIt parallel data register In the array-to-output path which allows PROM data to be stored while other data is being addressed. This meets thE requirements for pipelined microprogrammable control stores where instruction execute and instruction fetch are performed in parallel. Rochester Electronics Manufactured Components Rochester branded components are manufactured using either die/wafers purchased from the original suppliers or Rochester wafers recreated from the original IP. All re-creations are done with the approval of the Original Component Manufacturer (OCM). Parts are tested using original factory test programs or Rochester developed test solutions to guarantee product meets or exceeds the OCM data sheet. Quality Overview • ISO-9001 • AS9120 certification • Qualified Manufacturers List (QML) MIL-PRF-35835 • Class Q Military • Class V Space Level • Qualified Suppliers List of Distributors (QSLD) • Rochester is a critical supplier to DLA and meets all industry and DLA standards. Rochester Electronics, LLC is committed to supplying products that satisfy customer expectations for quality and are equal to those originally supplied by industry manufacturers. The original manufacturer’s datasheet accompanying this document reflects the performance and specifications of the Rochester manufactured version of this device. Rochester Electronics guarantees the performance of its semiconductor products to the original OCM specifications. ‘Typical’ values are for reference purposes only. Certain minimum or maximum ratings may be based on product characterization, design, simulation, or sample testing. FOR REFERENCE ONLY © 2019 Rochester Electronics, LLC. All Rights Reserved 05022019 To learn more, please visit www.rocelec.com Am27S25/27S25A/27S25SA � Advanced Micro Devices 4096-Bit (512x8) Bipolar Registered PROM with Preset and Clear Inputs DISTINCTIVE CHARACTERISTICS • 'SA' version offers ultrafast AC performance (25 ns set­ up and 12 ns clock-to-output) • On-chip edge-triggered registers - ideal for pipelined microprogrammed systems • Versatile synchronous and asynchronous enables for simplified word expansion • Buffered common Preset (PS) and Clear (CA) inputs • Slim, 24-pin, 300-mil lateral center package occupies approximately 1 /3 the board space required by standard discrete PROM and register • Consumes approximately 1 /2 the power of separate PROM/register combination for improved system reli­ abiloty • Platinum-Silicide fuses guarantee high reliability, fast programming, and exceptionally high programming yields (typ > 98%) GENERAL DESCRIPTION The Am27S25 (512 words by 8 bits) is a fully decoded, Schottky array, TTL Programmable Read-Only Memory (PROM), incorporating D-type master-slave data registers on chip. This device has three-state outputs compatible with low-power Schottky bus standards capable of satisfy­ ing the requirements of a variety of microprogrammable controls and state machines. This device contains an 8-bIt parallel data register In the array-to-output path which allows PROM data to be stored while other data is being addressed. This meets the ...,.. requirements for pipelined microprogrammable control stores where instruction execute and instruction fetch are performed in parallel. To offer the system designer maximum flexibility, this device contains both asynchronous and synchronous out­ put enables as well as common asynchronous preset and clear register controls. Upon power-up the outputs (Oo - 07) will be in a floating or high-impedance state. BLOCK DIAGRAM =--- .,'• ., .. ., ., 80006131 PRODUCT SELECTOR GUIDE Am27S25A Am27S25 AddreH Set-up Time (ns) 25 30 30 35 50 55 Clock-to-Ouput Delay (ns) 12 15 20 25 27 30 Operating Range C M C M C M Part Number Am27S25SA I E 03300 10 fulllJWlm..l Birt. � Issue Dale: January 1-! 5-81 I