28C64AT-25I/SO Microchip Technology, 28C64AT-25I/SO Datasheet

28C64AT-25I/SO

Manufacturer Part Number

28C64AT-25I/SO

Description

IC EEPROM 64KBIT 250NS 28SOIC

Manufacturer

Microchip Technology

Datasheet

1.28C64A-20L.pdf (10 pages)

Specifications of 28C64AT-25I/SO

Format - Memory

EEPROMs - Parallel

Memory Type

EEPROM

Memory Size

64K (8K x 8)

Speed

250ns

Interface

Parallel

Voltage - Supply

4.5 V ~ 5.5 V

Operating Temperature

-40°C ~ 85°C

Package / Case

28-SOIC (7.5mm Width)

Lead Free Status / RoHS Status

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Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

28C64AT-25I/SO

Manufacturer:

Quantity:

Company:

Meier Automation Equipment Co., Limited

Part Number:

28C64AT-25I/SO

Manufacturer:

Quantity:

20 000

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FEATURES

• Fast Read Access Time—150 ns

• CMOS Technology for Low Power Dissipation

• Fast Byte Write Time—200 s or 1 ms

• Data Retention >200 years

• High Endurance - Minimum 100,000 Erase/Write

• Automatic Write Operation

• Data Polling

• Ready/Busy

• Chip Clear Operation

• Enhanced Data Protection

• Electronic Signature for Device Identification

• 5-Volt-Only Operation

• Organized 8Kx8 JEDEC Standard Pinout

• Available for Extended Temperature Ranges:

DESCRIPTION

The Microchip Technology Inc. 28C64A is a CMOS 64K non-

volatile electrically Erasable PROM.

accessed like a static RAM for the read or write cycles with-

out the need of external components. During a “byte write”,

the address and data are latched internally, freeing the micro-

processor address and data bus for other operations. Fol-

lowing the initiation of write cycle, the device will go to a busy

state and automatically clear and write the latched data using

an internal control timer. To determine when the write cycle

is complete, the user has a choice of monitoring the Ready/

Busy output or using Data polling. The Ready/Busy pin is an

open drain output, which allows easy configuration in wired-

or systems. Alternatively, Data polling allows the user to read

the location last written to when the write operation is com-

plete. CMOS design and processing enables this part to be

used in systems where reduced power consumption and reli-

ability are required. A complete family of packages is offered

to provide the utmost flexibility in applications.

- 30 mA Active

- 100 A Standby

Cycles

- Internal Control Timer

- Auto-Clear Before Write Operation

- On-Chip Address and Data Latches

- V

- Pulse Filter

- Write Inhibit

- 28-pin Dual-In-Line Package

- 32-pin PLCC Package

- 28-pin SOIC Package

- Commercial: 0°C to +70°C

- Industrial:

2004 Microchip Technology Inc.

Detector

-40°C to +85°C

64K (8K x 8) CMOS EEPROM

The 28C64A

PACKAGE TYPES

BLOCK DIAGRAM

Busy

RDY/BSY

Rdy/

A12

I/O0

I/O1

I/O2

A12

Obsolete Device

• Pin 1 indicator on PLCC on top of package

• 1

Auto Erase/Write

Program Voltage

Data Protection

Output Enable

Control Logic

Chip Enable/

Generation

Circuitry

Timing

28C64A

Decoder

Vcc

A11

A10

I/O7

I/O6

I/O5

I/O4

I/O3

I/O0

Data

Poll

I/O0

Input/Output

Cell Matrix

DS11109K-page 1

Y Gating

16K bit

Buffers

I/O7

A11

A10

I/O7

I/O6

Related parts for 28C64AT-25I/SO

28C64AT-25I/SO Summary of contents

Page 1

... Commercial: 0°C to +70°C - Industrial: -40°C to +85°C DESCRIPTION The Microchip Technology Inc. 28C64A is a CMOS 64K non- volatile electrically Erasable PROM. accessed like a static RAM for the read or write cycles with- out the need of external components. During a “byte write”, the address and data are latched internally, freeing the micro- processor address and data bus for other operations ...

Page 2

... Tamb = -40°C to +85°C Units Conditions -0.1V to Vcc + 0V; Tamb = 25° MHz (Note -400 2 -0.1V to Vcc +0.1V OUT 0V; Tamb = 25° MHz (Note MHz (Note 5. (0°C to +70° (-40°C to +85° -0.3 to Vcc + Vcc All other inputs equal 2004 Microchip Technology Inc. ...

Page 3

... High Z Data Notes: ( specified for OE or CE, whichever occurs first OFF (2) OE may be delayed (3) This parameter is sampled and is not 100% tested 2004 Microchip Technology Inc 2.4V TTL Load + 100 Commercial (C): Industrial -15 -20 28C64A 28C64A Min Max Min Max — 150 — 200 — ...

Page 4

... WPH t 10 — OEH t 10 — OES t — 1000 — — 200 WPL 0.45V 2.0V 0. Tamb = 0°C to +70°C (I): Tamb = -40°C to +85°C Units Remarks Note Note 0.5 ms typical s 100 s typical DH t OEH Busy Ready t DB 2004 Microchip Technology Inc. ...

Page 5

... Valid V IL FIGURE 1-4: CHIP CLEAR WAVEFORMS TABLE 1-5: SUPPLEMENTARY CONTROL Mode CE Chip Clear V IL Extra Row Read V IL Extra Row Write * Note 12.0V 0.5V. *Pulsed per programming waveforms. H 2004 Microchip Technology Inc. t ACC WPH 28C64A Last Written Address Valid True Data Out ...

Page 6

... Chip Clear All data may be cleared to 1 chip clear cycle by raising volts and bringing the WE and CE low. This procedure clears all data, except for the extra row write cycle which 28C64A has completed writing and is ready 2004 Microchip Technology Inc. ...

Page 7

... To order or to obtain information, e.g., on pricing or delivery, please use the listed part numbers, and refer to the factory or the listed sales offices. 28C64A F T – 2004 Microchip Technology Inc. Package Plastic Leaded Chip Carrier (PLCC Plastic DIP (600 mil Plastic Small Outline IC (600 mil) ...

Page 8

... NOTES: DS11109K-page 8 2004 Microchip Technology Inc. ...

Page 9

... PICLAB, PICtail, PowerCal, PowerInfo, PowerMate, PowerTool, rfLAB, rfPICDEM, Select Mode, Smart Serial, SmartTel and Total Endurance are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. ...

Page 10

... Via Salvatore Quasimodo, 12 20025 Legnano (MI) Milan, Italy Tel: 39-0331-742611 Fax: 39-0331-466781 Netherlands Waegenburghtplein 4 NL-5152 JR, Drunen, Netherlands Tel: 31-416-690399 Fax: 31-416-690340 United Kingdom 505 Eskdale Road Winnersh Triangle Wokingham Berkshire, England RG41 5TU Tel: 44-118-921-5869 Fax: 44-118-921-5820 07/12/04  2004 Microchip Technology Inc. ...

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