Datasheet > PDM4M3120S15M

PDM4M3120S15M

更新时间： 2024-02-11 10:25:58

品牌	Logo	应用领域
IXYS		静态存储器
页数	文件大小	规格书
10页	108K
描述
SRAM Module, 1MX32, 15ns, CMOS, SIMM-72

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PDM4M3120S15M 数据手册

PRELIMINARY

PDM4M3120

3.3V, 1M x 32 CMOS

Static RAM Module

The PDM4M3120 is packaged in a 72-pin FR-4 ZIP

(Zig-zag In-line vertical Package) or a 72-pin SIMM or

Angled SIMM (Single In-line Memory Module). The

Features

■ High-density 3.3V, 4 megabyte Static RAM

module

■ Low proﬁle 72-pin ZIP (Zig-zag In-line vertical

Package) or 72-pin SIMM or Angled SIMM

(Single In-line Memory Module)

■ Fast access time: 12 ns (max.)

■ Surface mounted plastic components on an

epoxy laminate (FR-4) substrate.

■ Single 3.3V (±10%) power supply

■ Multiple V pins and decoupling capacitors for

maximum noise immunity

■ Inputs/ outputs directly TTL compatible

_{ZIP conﬁguration allows 72 pins to be placed on a}2

package 3.950" long and 0.365" wide. At only 0.590"

high, this low-proﬁle package is ideal for systems

with minimum board spacing. The SIMM conﬁgura-

_{tion allows use of edge mounted sockets to secure the}3

module.

All inputs and outputs of the PDM4M3120 are TTL

compatible and operate from a single 3.3V supply.

Full asynchronous circuitry requires no clock or

refresh for operation and provides equal access and

cycle times for ease of use.

Four identiﬁcation pins (PD0, PD1, PD2, PD3) are pro-

vided for applications in which different density

versions of the module are used. In this way, the tar-

Description

The PDM4M3120 is a 3.3V, 1M x 32 static RAM

module constructed on an epoxy laminate (FR-4)

substrate using eight 1M x 4 static RAMs in plastic

SOJ packages. Availability of four chip select lines

(one for each of four RAMs) provides byte access.

The PDM4M3120 is available with access times as

fast as 12 ns with minimal power consumption.

^{get system can read the respective levels of PD0, PD1,}6

PD2, PD3 to determine a 1M depth.

Functional Block Diagram

CS1

CS2

CS3

CS4

ADDRESS

PD3-PD0

1M x 32

RAM

I/O31-I/O0

Rev 1.1

12 3 4 5 6 7...10

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