LH5P832D-10 Sharp, LH5P832D-10 Datasheet

LH5P832D-10

Manufacturer Part Number

LH5P832D-10

Description

CMOS 256K(32K x 8) pseudo-static RAM

Manufacturer

Sharp

Datasheet

1.LH5P832D-12.pdf (9 pages)

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Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LH5P832D-10

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SHARP

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LH5P832

FEATURES

DESCRIPTION

ganized as 32,768

con-gate CMOS process technology.

cuitry with a DRAM memory cell for pseudo static

operation. This simplifies external clock inputs, while

providing the same simple, non-multiplexed pinout as

industry standard SRAMs. Moreover, due to the func-

tional similarities between PSRAMs and SRAMs, many

32K

with little or no changes. The advantage is the cost

savings realized with the lower cost PSRAM.

The LH5P832 is a 256K bit Pseudo-Static RAM or-

The LH5P832 uses convenient on-chip refresh cir-

32,768

Access time: 100/120 ns (MAX.)

Cycle time: 160/190 ns (MIN.)

TTL compatible I/O

256 refresh cycle/4 ms

Auto refresh is executed by internal

counter (controlled by OE/RFSH pin)

Self refresh is executed by internal timer

Single +5 V power supply

Packages:

Power consumption:

Operating: 357.5/303 mW

Standby: 16.5 mW

28-pin, 600-mil DIP

28-pin, 300-mil SK-DIP

28-pin, 450-mil SOP

8 SRAM sockets can be filled with the LH5P832

8 bit organization

8 bits. It is fabricated using sili-

CMOS 256K (32K

between DRAM and SRAM by offering low cost, low

standby power, and a simple interface.

maximum versatility. A ‘CE-Only’ refresh cycle re-

freshes the addressed row of memory cells transpar-

ently. All 256 rows must be refreshed or accessed every

four milliseconds. ‘Auto Refresh’ automatically cycles

through a different row on every OE/RFSH clock pulse,

accomplishing the row refreshes without the need to

supply row addresses externally. ‘Self Refresh’ further

simplifies the refresh requirements by eliminating the

need for address inputs and clock pulses entirely. An

automatic timer senses time periods when memory

accesses have ceased, and provides full refresh of all

rows of memory without any external assistance.

PIN CONNECTIONS

The LH5P832 PSRAM has the ability to fill the gap

Three methods of refresh control are provided for

28-PIN DIP

28-PIN SK-DIP

28-PIN SOP

Figure 1. Pin Connections for DIP, SK-DIP,

GND

I/O

and SOP Packages

8) Pseudo-Static RAM

OE/RFSH

I/O

R/W

TOP VIEW

5P832-1

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LH5P832D-10 Summary of contents

Page 1

LH5P832 FEATURES 32,768 8 bit organization Access time: 100/120 ns (MAX.) Cycle time: 160/190 ns (MIN.) Power consumption: Operating: 357.5/303 mW Standby: 16.5 mW TTL compatible I/O 256 refresh cycle/4 ms Auto refresh is executed by internal counter (controlled by ...

Page 2

LH5P832 COLUMN A 23 ADDRESS 11 BUFFER ROW ADDRESS A 5 BUFFER ...

Page 3

CMOS 256K (32K 8) Pseudo-Static RAM ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL Applied voltage on any pin Output short circuit current Power dissipation Operating temperature Storage temperature NOTE: 1. Referenced to GND RECOMMENDED OPERATING CONDITIONS (T PARAMETER SYMBOL MIN. Supply voltage ...

Page 4

LH5P832 AC CHARACTERISTICS READ AND WRITE CYCLES PARAMETER Random read, write cycle time Read modify write cycle time CE pulse width CE precharge time Address setup time Address hold time Read command hold time Read command setup time CE access ...

Page 5

CMOS 256K (32K 8) Pseudo-Static RAM ADDRESS OE RFSH t RCS I/O - ...

Page 6

LH5P832 OE RFSH IL t RCS I ...

Page 7

CMOS 256K (32K 8) Pseudo-Static RAM RFD OE RFSH IL V I NOTE R/W = Don't Care ...

Page 8

LH5P832 PACKAGE DIAGRAMS 28DIP (DIP028-P-0600 36.30 [1.429] 35.70 [1.406] 2.54 [0.100] 0.60 [0.024] TYP. 0.40 [0.016] MAXIMUM LIMIT DIMENSIONS IN MM [INCHES] MINIMUM LIMIT 28SK-DIP (DIP028-P-0300 35.00 [1.378] 34.40 [1.354] 2.54 [0.100] 0.56 [0.022] TYP. 0.36 ...

Page 9

CMOS 256K (32K 8) Pseudo-Static RAM 28SOP (SOP028-P-0450) 1.27 [0.050] TYP. 0.50 [0.020] 0.30 [0.012 18.20 [0.717] 17.80 [0.701] MAXIMUM LIMIT DIMENSIONS IN MM [INCHES] MINIMUM LIMIT ORDERING INFORMATION LH5P832 Device Type Package Example: LH5P832N-12 (CMOS 256K (32K ...

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