Details, datasheet, quote on part number: PDM4M4050S25M
PartPDM4M4050S25M
CategoryMemory => SRAM => Modules => 256 KB
Description256kx32 Bicmos/cmos Static RAM Module
CompanyIXYS Corporation
DatasheetDownload PDM4M4050S25M datasheet
  

 

Features, Applications
Features

High-density 8 megabit Static RAM module Low profile 64-pin ZIP, 64 -pin SIMM (Single Inline Memory Module) or Angled SIMM. Ultra fast access time: 10 ns (max.) Surface mounted plastic components on an epoxy laminate (FR-4) substrate Single 5V (10%) power supply Multiple VSS pins and decoupling capacitors for maximum noise immunity Inputs/outputs directly TTL-compatible

The PDM4M4050 is packaged 64-pin FR-4 ZIP (Zig-zag In-line vertical Package) a 64-pin SIMM (Single In-line Memory Module). The Angled SIMM configuration allows 64 pins to be placed on a package 3.50" long and 0.35" wide and 0.68" high. The SIMM configuration also allows use of edge mounted sockets to secure the module. All inputs and outputs of the PDM4M4050 are TTLcompatible and operate from a single 5V supply. Full asynchronous circuitry requires no clocks or refresh for operation and provides equal access and cycle times for ease of use. Two identification pins (PD0 and PD1) are provided for applications in which different density versions of the module are used. In this way, the target system can read the respective levels of PD0 and PD1 to determine a 256K depth.

Description

The x 32 static RAM module constructed on an epoxy laminate (FR-4) substrate using eight x 4 static RAMs in plastic SOJ packages. Availability of four chips select lines (one for each group of two RAMs) provides byte access. Extremely fast speeds can be achieved due to the use of 1 megabit static RAMs fabricated in Paradigm's high-performance, high-reliability technology. The PDM4M4050 is available with access time as fast 10 ns with minimal power consumption.

Data Inputs/Outputs Addresses Chip Selects Write Enable Output Enable Depth Identification Power Ground

NOTE: 1. Pins 2 and 3 (PD0 and PD1) are read by the user to determine the density of the module. If PD0 reads VSS and PD1 reads VSS then the module has a 256K depth.

Mode Deselect/ Power-down Read Write Deselect

Symbol VTERM TBIAS TSTG TA PT IOUT Rating Terminal Voltage with Respect to VSS Temperature Under Bias Storage Temperature Operating Temperature Power Dissipation DC Output Current Com'l. 1.0 50 Ind. 1.0 50 Unit W mA

NOTE: 1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.

Symbol VCC VSS Commercial Parameter Supply Voltage Supply Voltage Ambient Temperature Min. 4.75 0 Typ. 0 25 Max. 0 70 Unit V C


 

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