27LV256_04 Datasheet, PDF (1/10 Pages) Microchip Technology – 256K (32K x 8) Low-Voltage CMOS EPROM

Obsolete Device
27LV256
256K (32K x 8) Low-Voltage CMOS EPROM
FEATURES
• Wide voltage range 3.0V to 5.5V
• High speed performance
- 200 ns access time available at 3.0V
• CMOS Technology for low power consumption
- 8 mA Active current at 3.0V
- 20 mA Active current at 5.5V
- 100 µA Standby current
• 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
- 28-pin Dual-in-line package
- 32-pin PLCC package
- 28-pin SOIC package
- Tape and reel
• Data Retention > 200 years
• Available for the following temperature ranges:
- Commercial: 0°C to +70°C
- Industrial:
-40°C to +85°C
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.
PACKAGE TYPES
PDIP
VPP • 1
A12 2
A7 3
A6 4
A5 5
A4 6
A3 7
A2 8
A1 9
A0 10
O0 11
O1 12
O2 13
VSS 14
28 VCC
27 A14
26 A13
25 A8
24 A9
23 A11
22 OE
21 A10
20 CE
19 O7
18 O6
17 O5
16 O4
15 O3
PLCC
A6 5
A5 6
A4 7
A3 8
A2 9
A1 10
A0 11
NC 12
O0 13
29 A8
28 A9
27 A11
26 NC
25 OE
24 A10
23 CE
22 O7
21 O6
SOIC
VPP
1
A12
2
A7
3
A6
4
A5
5
A4
6
A3
7
A2
8
A1
9
A0
10
O0
11
O1
12
O2
13
VSS
14
28
VCC
27
A14
26
A13
25
A8
24
A9
23
A11
22
OE
21
A10
20
CE
19
O7
18
O6
17
O5
16
O4
15
O3
 2004 Microchip Technology Inc.
DS11020H-page 1