27C04A Microchip Technology, 27C04A Datasheet

27C04A

Manufacturer Part Number

27C04A

Description

4K (512 x 8) CMOS EEPROM

Manufacturer

Microchip Technology

Datasheet

1.27C04A.pdf (8 pages)

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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

• Endurance - Minimum 10

• Data Polling

• Chip Clear Operation

• Enhanced Data Protection

• 5-Volt-Only Operation

• Organized 512x8 JEDEC standard pinout

• Available for Extended Temperature Ranges:

DESCRIPTION

The Microchip Technology Inc. 28C04A is a CMOS 4K

non-volatile electrically Erasable and Programmable

Read Only Memory (EEPROM). The 28C04A is

accessed like a static RAM for the read or write cycles

without the need of external components. During a

“byte write”, the address and data are latched internally,

freeing the microprocessor address and data bus for

other operations. Following the initiation of write cycle,

the device will go to a busy state and automatically

clear and write the latched data using an internal con-

trol timer. To determine when a write cycle is complete,

the 28C04A uses Data polling. Data polling allows the

user to read the location last written to when the write

operation is complete. CMOS design and processing

enables this part to be used in systems where reduced

power consumption and reliability are required. A com-

plete family of packages is offered to provide the utmost

ﬂexibility in applications.

1996 Microchip Technology Inc.

- 30 mA Active

- 100 A Standby

- Automatic Write Operation

- Internal Control Timer

- Auto-Clear Before Write Operation

- On-Chip Address and Data Latches

- V

- Pulse Filter

- Write Inhibit

- 24-pin Dual-In-Line Package

- 32-pin PLCC Package

- Commercial: 0˚C to +70˚C

- Industrial: -40˚C to +85˚C

Detector

4K (512 x 8) CMOS EEPROM

Erase/Write Cycles

This document was created with FrameMaker 4 0 4

PACKAGE TYPES

BLOCK DIAGRAM

DIP

PLCC

• Pin 1 indicator on PLCC on top of package

Auto Erase/Write

Program Voltage

I/O0

Data Protection

Output Enable

Control Logic

Chip Enable/

I/O0

I/O1

I/O2

Generation

Circuitry

Timing

Decoder

• 1

28C04A

Data

Poll

I/O0

Vcc

I/O7

I/O6

I/O5

I/O4

I/O3

I/O7

I/O6

Input/Output

Cell Matrix

DS11126F-page 1

Y Gating

Buffers

4K bit

I/O7

Related parts for 27C04A

27C04A Summary of contents

Page 1

... Available for Extended Temperature Ranges: - Commercial: 0˚C to +70˚C - Industrial: -40˚C to +85˚C DESCRIPTION The Microchip Technology Inc. 28C04A is a CMOS 4K non-volatile electrically Erasable and Programmable Read Only Memory (EEPROM). The 28C04A is accessed like a static RAM for the read or write cycles without the need of external components. During a “ ...

Page 2

... 0V; Tamb = 25˚ MHz I = -400 2 -0. 0.1V OUT 0V 25˚C; IN AMB MHz MHz (Note 5. (0˚C to +70˚ (-40˚C to +85˚ -0.3 to Vcc+1 CC 1996 Microchip Technology Inc. ...

Page 3

... 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 1996 Microchip Technology Inc 2.4V 0.45V TTL Load + 100 pF Commercial (C): Tamb = 0˚C to +70˚C Industrial (I): Tamb = -40˚ ...

Page 4

... OEH t 10 OES t 1000 200 WPL 0.45V 2.0V 0. (I): Tamb= -40˚C to 85˚C Units Remarks Note Note 2 ms 0.5 ms typical s 100 s typical after OEH 1996 Microchip Technology Inc. ...

Page 5

... Data In Data Valid V IL FIGURE 1-4: CHIP CLEAR WAVEFORMS 1996 Microchip Technology Inc. t ACC WPH 28C04A Last Written Address Valid True Data Out I/O7 Out 10ms ...

Page 6

... DEVICE OPERATION The Microchip Technology Inc. 28C04A has four basic modes of operation—read, standby, write inhibit, and byte write—as outlined in the following table. Operation CE IE Mode Read L L Standby H X Write Inhibit H X Write Inhibit X L Write Inhibit X X Byte Write ...

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. 28C04A F T – 1996 Microchip Technology Inc. Package Plastic Leaded Chip Carrier (PLCC Plastic DIP (600mill) Temperature Blank = +70 C ...

Page 8

... Information contained in this publication regarding device applications and the like is intended through suggestion only and may be superseded by updates. No repre- sentation or warranty is given and no liability is assumed by Microchip Technology Incorporated with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights arising from such use or otherwise. Use of Microchip’s products as critical components in life support systems is not autho- rized except with express written approval by Microchip ...

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