27C256-25/L MICROCHIP [Microchip Technology], 27C256-25/L Datasheet

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27C256-25/L

Manufacturer Part Number
27C256-25/L
Description
256K (32K x 8) Low-Voltage CMOS EPROM
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
FEATURES
• Wide voltage range 3.0V to 5.5V
• High speed performance
• CMOS Technology for low power consumption
• Factory programming available
• Auto-insertion-compatible plastic packages
• Auto ID aids automated programming
• Separate chip enable and output enable controls
• High speed “Express” programming algorithm
• Organized 32K x 8: JEDEC standard pinouts
• Data Retention > 200 years
• Available for the following temperature ranges:
DESCRIPTION
The Microchip Technology Inc. 27LV256 is a low volt-
age (3.0 volt) CMOS EPROM designed for battery
powered applications. The device is organized as a
32K x 8 (32K-Byte) non-volatile memory product. The
27LV256 consumes only 8 mA maximum of active cur-
rent during a 3.0 volt read operation therefore improv-
ing battery performance. This device is designed for
very low voltage applications where conventional 5.0
volt only EPROMS can not be used. Accessing individ-
ual bytes from an address transition or from power-up
(chip enable pin going low) is accomplished in less than
200 ns at 3.0V. This device allows systems designers
the ability to use low voltage non-volatile memory with
today’s' low voltage microprocessors and peripherals in
battery powered applications.
A complete family of packages is offered to provide the
most flexibility in applications. For surface mount appli-
cations, PLCC or SOIC packaging is available. Tape
and reel packaging is also available for PLCC or SOIC
packages.
- 200 ns access time available at 3.0V
- 8 mA Active current at 3.0V
- 20 mA Active current at 5.5V
- 100 A Standby current
- 28-pin Dual-in-line package
- 32-pin PLCC package
- 28-pin SOIC package
- Tape and reel
- Commercial:
- Industrial:
2004 Microchip Technology Inc.
256K (32K x 8) Low-Voltage CMOS EPROM
0°C to +70°C
-40°C to +85°C
PACKAGE TYPES
PDIP
PLCC
SOIC
Obsolete Device
A12
NC
V
V
O0
A6
A5
A4
A3
A2
A1
A0
O0
O1
O2
A7
A6
A5
A4
A3
A2
A1
A0
A12
PP
SS
V
V
O0
O1
O2
A7
A6
A5
A4
A3
A2
A1
A0
PP
SS
27LV256
5
6
7
8
9
10
11
12
13
• 1
2
3
4
5
6
7
8
9
10
11
12
13
14
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
28
27
26
25
24
23
22
21
20
19
18
17
16
15
29
28
27
26
25
24
23
22
21
V
A14
A13
A8
A9
A11
OE
A10
CE
O7
O6
O5
O4
O3
CC
A8
A9
A11
NC
OE
A10
CE
O7
O6
V
A14
A13
A8
A9
A11
OE
A10
CE
O7
O6
O5
O4
O3
DS11020H-page 1
CC

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27C256-25/L Summary of contents

Page 1

... This device allows systems designers the ability to use low voltage non-volatile memory with today’s' low voltage microprocessors and peripherals in battery powered applications. A complete family of packages is offered to provide the most flexibility in applications ...

Page 2

ELECTRICAL CHARACTERISTICS 1.1 Maximum Ratings* V and input voltages w.r.t. V ........ -0.6V to +7.25V voltage w.r.t. V during PP SS programming ......................................... -0.6V to +14V Voltage on A9 w.r.t. V ...................... -0.6V to +13.5V ...

Page 3

TABLE 1-3: READ OPERATION AC CHARACTERISTICS AC Testing Waveform: Output Load: Input Rise and Fall Times Ambient Temperature: Parameter Sym Address to Output Delay t ACC CE to Output Delay Output Delay t OE ...

Page 4

TABLE 1-4: PROGRAMMING DC CHARACTERISTICS Parameter Status Input Voltages Logic”1” Logic”0” Input Leakage — Output Voltages Logic”1” Logic”0” V Current, program & verify — Current, program — Product Identification — Note 1: V must be ...

Page 5

FIGURE 1-2: PROGRAMMING WAVEFORMS V IH Address Data 13.0V( 5.0V VPS 6.5V( VCS 5. ...

Page 6

Standby Mode The standby mode is defined when the CE pin is high (V ) and a program mode is not defined. Output Dis- IH able 1.4 Output Enable This feature eliminates bus contention in multiple bus microprocessor ...

Page 7

FIGURE 1-3: PROGRAMMING EXPRESS ALGORITHM Conditions 25+/-5C amb V = 6.5+/-0.25V 13.0+/-0.25V PP 2004 Microchip Technology Inc. 27LV256 Start ADDR = First Location 13. Program ...

Page 8

Product Identification System 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. 27LV256 – Package: Temperature Range: Access ...

Page 9

... October 2003. The Company’s quality system processes and procedures are for its PICmicro 8-bit MCUs, K ® EE devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip’s quality system for the design and manufacture of development systems is ISO 9001:2000 certified. L code hopping ® ...

Page 10

W ORLDWIDE AMERICAS Corporate Office 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Technical Support: 480-792-7627 Web Address: www.microchip.com Atlanta 3780 Mansell Road, Suite 130 Alpharetta, GA 30022 Tel: 770-640-0034 Fax: 770-640-0307 Boston 2 Lan Drive, Suite ...

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