AT28LV256-25JC

AT28LV256-25JC Datasheet

The AT28LV256 is a high-performance Electrically Erasable and Programmable Read

Part	Datasheet
AT28LV256-25JC	AT28LV256-25JC (pdf)

Related Parts	Information
AT28LV256-25PC	AT28LV256-25PC
AT28LV256-25TI	AT28LV256-25TI
AT28LV256-25TC	AT28LV256-25TC
AT28LV256-25SC	AT28LV256-25SC
AT28LV256-20TC	AT28LV256-20TC
AT28LV256-25PI	AT28LV256-25PI
AT28LV256-25JI	AT28LV256-25JI
AT28LV256-20TI	AT28LV256-20TI
AT28LV256-20JC	AT28LV256-20JC
AT28LV256-20JI	AT28LV256-20JI
AT28LV256-25SI	AT28LV256-25SI

PDF Datasheet Preview
• Single 3.0V - 3.6V Supply • Fast Read Access Time 200 ns • Automatic Page Write Operation Internal Address and Data Latches for 64 Bytes Internal Control Timer • Fast Write Cycle Times Page Write Cycle Time 10 ms Maximum 1- to 64-byte Page Write Operation • Low Power Dissipation 15 mA Active Current 20 µA CMOS Standby Current • Hardware and Software Data Protection • DATA Polling for End of Write Detection • High Reliability CMOS Technology Endurance 10,000 Cycles Data Retention 10 Years • JEDEC Approved Byte-wide Pinout • Commercial and Industrial Temperature Ranges The AT28LV256 is a high-performance Electrically Erasable and Programmable Read Only Memory. Its 256K of memory is organized as 32,768 words by 8 bits. Manufac- tured with Atmel’s advanced nonvolatile CMOS technology, the device offers access times to 200 ns with power dissipation of just 54 mW. When the device is deselected, the CMOS standby current is less than 200 µA. continued Pin Configurations Pin Name Function PDIP, SOIC Top View A0 - A14 CE OE WE I/O0 - I/O7 NC DC Addresses Chip Enable Output Enable Write Enable Data Inputs/Outputs No Connect Don’t Connect PLCC Top View A14 1 A12 2 A7 3 A6 4 A5 5 A4 6 A3 7 A2 8 A1 9 A0 10 I/O0 11 I/O1 12 I/O2 13 GND 14 28 VCC 27 WE 26 A13 25 A8 24 A9 23 A11 22 OE 21 A10 20 CE 19 I/O7 18 I/O6 17 I/O5 16 I/O4 15 I/O3 TSOP Top View 4 A7 3 A12 2 A14 1 DC 32 VCC 31 WE 30 A13 A6 5 A5 6 A4 7 A3 8 A2 9 A1 10 A0 11 NC 12 I/O0 13 29 A8 28 A9 27 A11 26 NC 25 OE 24 A10 23 CE 22 I/O7 21 I/O6 I/O1 14 I/O2 15 GND 16 DC 17 I/O3 18 I/O4 19 I/O5 20 Note PLCC package pins 1 and 17 are DON’T CONNECT. OE 1 A11 2 A9 3 A8 4 A13 5 WE 6 VCC 7 A14 8 A12 9 A7 10 A6 11 A5 12 A4 13 A3 14 28 A10 27 CE 26 I/O7 25 I/O6 24 I/O5 23 I/O4 22 I/O3 21 GND 20 I/O2 19 I/O1 18 I/O0 17 A0 16 A1 15 A2 256K 32K x 8 Low-Voltage Parallel EEPROMs AT28LV256 The AT28LV256 is accessed like a Static RAM for the read or write cycle without the need for external components. The device contains a 64-byte page register to allow writing of up to 64 bytes simultaneously. During a write cycle, the addresses and 1 to 64 bytes of data are internally latched, freeing the address and data bus for other operations. Following the initiation of a write cycle, the device will automatically write the latched data using an internal control timer. The end of a write cycle can be detected by DATA polling of I/O7. Once the end of a write cycle has been detected a new access for a read or write can begin. Atmel’s 28LV256 has additional features to ensure high quality and manufacturability. The device utilizes internal error correction for extended endurance and improved data retention characteristics. An optional software data protection mechanism is available to guard against inadvertent writes. The device also includes an extra 64 bytes of EEPROM for device identification or tracking. Block Diagram Absolute Maximum Ratings* Temperature under Bias -55°C to +125°C Storage Temperature -65°C to +150°C All Input Voltages including NC Pins with Respect to Ground ...................................-0.6V to +6.25V All Output Voltages with Respect to Ground .............................-0.6V to VCC + 0.6V Voltage on OE and A9 with Respect to Ground ...................................-0.6V to +13.5V NOTICE: Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability AT28LV256 Ordering Information 1 tACC ICC mA Active Standby Note See Valid Part Numbers table below. Ordering Code AT28LV256-20JC AT28LV256-20PC AT28LV256-20SC AT28LV256-20TC AT28LV256-20JI AT28LV256-20PI AT28LV256-20SI AT28LV256-20TI AT28LV256-25JC AT28LV256-25PC AT28LV256-20SC AT28LV256-25TC AT28LV256-25JI AT28LV256-25PI AT28LV256-20SI AT28LV256-25TI Package 32J 28P6 28S 28T 32J 28P6 28S 28T 32J 28P6 28S 28T 32J 28P6 28S 28T Valid Part Numbers The following table lists standard Atmel products that can be ordered. Device Numbers Speed Package and Temperature Combinations AT28LV256 JC, JI, PC, PI, SC, SI, TC, TI AT28LV256 JC, JI, PC, PI, SC, SI, TC, TI Die Products Reference Section Parallel EEPROM Die Products Operation Range Commercial 0° to 70°C Industrial -40° to 85°C Commercial 0° to 70°C Industrial -40° to 85°C 32J 28P6 28S 28T Package Type 32-lead, Plastic J-leaded Chip Carrier PLCC 28-lead, Wide, Plastic Dual Inline Package PDIP 28-lead, Wide, Plastic Gull Wing Small Outline SOIC 28-lead, Plastic Thin Small Outline Package TSOP AT28LV256 AT28LV256 Packaging Information 32J, 32-lead, Plastic J-leaded Chip Carrier PLCC Dimensions in Inches and Millimeters JEDEC STANDARD MS-016 AE X PIN NO. 1 IDENTIFY AT CONTACT POINTS X MAX 3X 28S, 28-lead, Wide, Plastic Gull Wing Small Outline SOIC Dimensions in Inches and Millimeters 28P6, 28-lead, Wide, Plastic Dual Inline Package PDIP Dimensions in Inches and Millimeters JEDEC STANDARD MS-011 AB SEATING PLANE 0 REF 15 28T, 28-lead, Plastic Thin Small Outline Package TSOP Dimensions in Millimeters and Inches

PDF Datasheet Preview

• Single 3.0V - 3.6V Supply
• Fast Read Access Time 200 ns
• Automatic Page Write Operation

Internal Address and Data Latches for 64 Bytes Internal Control Timer
• Fast Write Cycle Times Page Write Cycle Time 10 ms Maximum 1- to 64-byte Page Write Operation
• Low Power Dissipation 15 mA Active Current 20 µA CMOS Standby Current
• Hardware and Software Data Protection
• DATA Polling for End of Write Detection
• High Reliability CMOS Technology Endurance 10,000 Cycles Data Retention 10 Years
• JEDEC Approved Byte-wide Pinout
• Commercial and Industrial Temperature Ranges

The AT28LV256 is a high-performance Electrically Erasable and Programmable Read

Only Memory. Its 256K of memory is organized as 32,768 words by 8 bits. Manufac-
tured with Atmel’s advanced nonvolatile CMOS technology, the device offers access
times to 200 ns with power dissipation of just 54 mW. When the device is deselected,
the CMOS standby current is less than 200 µA.
continued

Pin Configurations

Pin Name

Function

PDIP, SOIC Top View

A0 - A14 CE OE WE I/O0 - I/O7 NC DC

Addresses Chip Enable Output Enable Write Enable Data Inputs/Outputs No Connect Don’t Connect

PLCC Top View

A14 1 A12 2

A7 3 A6 4 A5 5 A4 6 A3 7 A2 8 A1 9 A0 10 I/O0 11 I/O1 12 I/O2 13 GND 14
28 VCC 27 WE 26 A13 25 A8 24 A9 23 A11 22 OE 21 A10 20 CE 19 I/O7 18 I/O6 17 I/O5 16 I/O4 15 I/O3

TSOP Top View
4 A7 3 A12 2 A14 1 DC 32 VCC 31 WE 30 A13

A6 5 A5 6 A4 7 A3 8 A2 9 A1 10 A0 11 NC 12 I/O0 13
29 A8 28 A9 27 A11 26 NC 25 OE 24 A10 23 CE 22 I/O7 21 I/O6

I/O1 14 I/O2 15 GND 16 DC 17 I/O3 18 I/O4 19 I/O5 20

Note PLCC package pins 1 and 17 are DON’T CONNECT.

OE 1 A11 2

A9 3 A8 4 A13 5 WE 6 VCC 7 A14 8 A12 9 A7 10 A6 11 A5 12 A4 13 A3 14
28 A10 27 CE 26 I/O7 25 I/O6 24 I/O5 23 I/O4 22 I/O3 21 GND 20 I/O2 19 I/O1 18 I/O0 17 A0 16 A1 15 A2
256K 32K x 8 Low-Voltage Parallel EEPROMs AT28LV256

The AT28LV256 is accessed like a Static RAM for the read or write cycle without the need for external components. The device contains a 64-byte page register to allow writing of up to 64 bytes simultaneously. During a write cycle, the addresses and 1 to 64 bytes of data are internally latched, freeing the address and data bus for other operations. Following the initiation of a write cycle, the device will automatically write the latched data using an internal control timer. The end of a write cycle can be detected by DATA polling
of I/O7. Once the end of a write cycle has been detected a new access for a read or write can begin.

Atmel’s 28LV256 has additional features to ensure high quality and manufacturability. The device utilizes internal error correction for extended endurance and improved data retention characteristics. An optional software data protection mechanism is available to guard against inadvertent writes. The device also includes an extra 64 bytes of EEPROM for device identification or tracking.

Block Diagram

Absolute Maximum Ratings*

Temperature under Bias -55°C to +125°C

Storage Temperature -65°C to +150°C

All Input Voltages including NC Pins with Respect to Ground ...................................-0.6V to +6.25V

All Output Voltages with Respect to Ground .............................-0.6V to VCC + 0.6V

Voltage on OE and A9 with Respect to Ground ...................................-0.6V to +13.5V
*NOTICE:

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability

AT28LV256
Ordering Information 1
tACC

ICC mA

Active

Standby

Note See Valid Part Numbers table below.
Ordering Code

AT28LV256-20JC AT28LV256-20PC AT28LV256-20SC AT28LV256-20TC

AT28LV256-20JI AT28LV256-20PI AT28LV256-20SI AT28LV256-20TI

AT28LV256-25JC AT28LV256-25PC AT28LV256-20SC AT28LV256-25TC

AT28LV256-25JI AT28LV256-25PI AT28LV256-20SI AT28LV256-25TI

Package
32J 28P6 28S 28T
32J 28P6 28S 28T
32J 28P6 28S 28T
32J 28P6 28S 28T

Valid Part Numbers

The following table lists standard Atmel products that can be ordered.

Device Numbers

Speed

Package and Temperature Combinations

AT28LV256

JC, JI, PC, PI, SC, SI, TC, TI

AT28LV256

JC, JI, PC, PI, SC, SI, TC, TI

Die Products

Reference Section Parallel EEPROM Die Products

Operation Range Commercial 0° to 70°C

Industrial -40° to 85°C

Commercial 0° to 70°C

Industrial -40° to 85°C
32J 28P6 28S 28T

Package Type 32-lead, Plastic J-leaded Chip Carrier PLCC 28-lead, Wide, Plastic Dual Inline Package PDIP 28-lead, Wide, Plastic Gull Wing Small Outline SOIC 28-lead, Plastic Thin Small Outline Package TSOP

AT28LV256

AT28LV256

Packaging Information
32J, 32-lead, Plastic J-leaded Chip Carrier PLCC Dimensions in Inches and Millimeters

JEDEC STANDARD MS-016 AE

X PIN NO. 1 IDENTIFY

AT CONTACT POINTS

X MAX 3X
28S, 28-lead, Wide, Plastic Gull Wing Small Outline SOIC Dimensions in Inches and Millimeters
28P6, 28-lead, Wide, Plastic Dual Inline Package PDIP Dimensions in Inches and Millimeters

JEDEC STANDARD MS-011 AB

SEATING PLANE
0 REF 15
28T, 28-lead, Plastic Thin Small Outline Package TSOP Dimensions in Millimeters and Inches *

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Datasheet ID: AT28LV256-25JC 518979