ATMEL AT27BV020-90VI, AT27BV020-90VC, AT27BV020-90TI, AT27BV020-90TC, AT27BV020-90JI Datasheet

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ATMEL AT27BV020-90VI, AT27BV020-90VC, AT27BV020-90TI, AT27BV020-90TC, AT27BV020-90JI Datasheet

Features

Fast Read Access Time - 90 ns

Dual Voltage Range Operation

Unregulated Battery Power Supply Range, 2.7V to 3.6V or Standard 5V ± 10% Supply Range

Compatible with JEDEC Standard AT27C020

Low Power CMOS Operation

20 μA max. (less than 1 μA typical) Standby for VCC = 3.6V

29 mW max. Active at 5 MHz for V CC = 3.6V

Wide Selection of JEDEC Standard Packages

32-Lead PLCC

32-Lead TSOP (8 x 20mm)

32-Lead VSOP (8 x 14mm)

42-Ball CBGA (8 x 8mm)

High Reliability CMOS Technology

2,000V ESD Protection

200 mA Latchup Immunity

RapidProgramming Algorithm - 100 μs/byte (typical)

CMOS and TTL Compatible Inputs and Outputs

JEDEC Standard for LVTTL and LVBO

Integrated Product Identification Code

Commercial and Industrial Temperature Ranges

Description

The AT27BV020 is a high-performance, low-power, low-voltage 2,097,152-bit onetime programmable read only memory (OTP EPROM) organized as 256K by 8 bits. It requires only one supply in the range of 2.7 to 3.6V in normal read mode operation, making it ideal for fast, portable systems using either regulated or unregulated battery

power.

(continued)

Pin Configurations

 

CBGA Top View

 

Pin Name

Function

1

2

3

4

5

6

7

A0 - A17

Address

A

 

 

 

 

 

 

O0 - O7

Outputs

GND O6 VCC VCC O2

OE

GND

B

O7

O4

NC

NC

O0

CE

 

 

A17

CE

Chip Enable

C

 

 

 

 

 

 

A10

NC

O5

NC

O3

O1

A0

OE

Output Enable

D

 

 

 

 

 

 

A14

A13

A9

NC

NC

A6

A3

 

 

E

 

 

 

 

 

 

PGM

Program Strobe

A16

A11 PGM NC

A7

A4

A1

F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A15

A12

A8

NC

VPP

A5

A2

PLCC, Top View

 

 

 

 

 

 

 

TSOP, VSOP Top View

Type 1

2-Megabit

(256K x 8)

Unregulated

Battery-Voltage

High Speed

OTP EPROM

AT27BV020

0902A-A–10/97

1

Atmel’s innovative design techniques provide fast speeds that rival 5V parts while keeping the low power consumption of a 3V supply. At VCC = 2.7V, any byte can be accessed in less than 90 ns. With a typical power dissipation of only 18 mW at 5 MHz and VCC = 3V, the AT27BV020 consumes less than one fifth the power of a standard 5V EPROM. Standby mode supply current is typically less than 1 μA at 3V. The AT27BV020 simplifies system design and stretches battery lifetime even further by eliminating the need for power supply regulation

The AT27BV020 is available in industry standard JEDEC approved one-time programmable (OTP) plastic PLCC, TSOP and VSOP packages, as well as a 42-ball, 1 mm pitch, plastic chip-scale Ball Grid Array package (CBGA). All devices feature two-line control (CE, OE) to give designers the flexibility to prevent bus contention.

The AT27BV020 operating with VCC at 3.0V produces TTL level outputs that are compatible with standard TTL logic devices operating at VCC = 5.0V. At VCC = 2.7V, the part is compatible with JEDEC approved low voltage battery operation (LVBO) interface specifications. The device is also capable of standard 5-volt operation making it ideally suited for dual supply range systems or card products that are pluggable in both 3-volt and 5-volt hosts.

Atmel's AT27BV020 has additional features to ensure high quality and efficient production use. The RapidProgram-

ming Algorithm reduces the time required to program the part and guarantees reliable programming. Programming time is typically only 100 μs/byte. The Integrated Product Identification Code electronically identifies the device and manufacturer. This feature is used by industry standard programming equipment to select the proper programming algorithms and voltages. The AT27BV020 programs exactly the same way as a standard 5V AT27C020 and uses the same programming equipment.

System Considerations

Switching between active and standby conditions via the Chip Enable pin may produce transient voltage excursions. Unless accommodated by the system design, these transients may exceed data sheet limits, resulting in device non-conformance. At a minimum, a 0.1 μF high frequency, low inherent inductance, ceramic capacitor should be utilized for each device. This capacitor should be connected between the VCC and Ground terminals of the device, as close to the device as possible. Additionally, to stabilize the supply voltage level on printed circuit boards with large EPROM arrays, a 4.7 μF bulk electrolytic capacitor should be utilized, again connected between the VCC and Ground terminals. This capacitor should be positioned as close as possible to the point where the power supply is connected to the array.

2

AT27BV020

 

 

 

Block Diagram

Absolute Maximum Ratings*

Temperature Under Bias

.................................. -40°C to +85°C

Storage Temperature .....................................

-65°C to +125°C

Voltage on Any Pin with

-2.0V to +7.0V(1)

Respect to Ground .........................................

Voltage on A9 with

- 2.0V to +14.0V(1)

Respect to Ground ......................................

VPP Supply Voltage with

- 2.0V to +14.0V(1)

Respect to Ground .......................................

AT27BV020

*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.

Note: Minimum voltage is -0.6V DC which may undershoot to - 2.0V for pulses of less than 20 ns.Maximum output pin voltage is VCC + 0.75V DC which may be exceeded if certain precautions are observed (consult application notes) and which may overshoot to +7.0V for pulses of less than 20 ns.

Operating Modes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mode / Pin

CE

 

OE

 

PGM

Ai

 

VPP

VCC

Outputs

Read(2)

 

V

 

V

 

X(1)

Ai

 

X

V

(2)

D

OUT

 

 

 

IL

 

 

IL

 

 

 

 

 

 

 

 

 

CC

 

Output Disable(2)

 

X

 

V

IH

 

X

X

 

X

V

(2)

High Z

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CC

 

 

Standby(2)

 

V

IH

 

X

 

X

X

 

X

V

(2)

High Z

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CC

 

 

Rapid Program(3)

 

V

 

V

IH

 

V

Ai

 

V

VCC(3)

D

IN

 

 

 

IL

 

 

 

 

IL

 

 

 

PP

 

 

 

PGM Verify(3)

 

V

 

V

 

V

IH

Ai

 

V

V

(3)

D

OUT

 

 

 

IL

 

 

IL

 

 

 

 

 

PP

 

CC

 

PGM Inhibit(3)

 

V

IH

 

X

 

X

X

 

V

V

(3)

High Z

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PP

 

CC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A9 = V

(4)

 

 

 

Identification

Product Identification(3)(5)

 

V

 

V

 

X

A0 = V

 

H

X

V

(3)

 

 

 

 

or V

Code

 

 

 

IL

 

 

IL

 

 

 

 

 

IH

IL

 

 

CC

 

 

 

 

 

 

 

 

 

 

 

 

 

A1 - A17 = VIL

 

 

 

 

 

Notes: 1. X Can be VIL or VIH.

2.Read, output disable, and standby modes require, 2.7V VCC 3.6V, or 4.5V VCC 5.5V.

3.Refer to Programming Characteristics. Programming modes requires VCC = 6.5V.

4.VH = 12.0 ± 0.5V.

5.Two identifier bytes may be selected. All Ai inputs are held low (VIL), except A9 which is set to VH and A0 which is toggled low (VIL) to select the Manufacturer’s Identification byte and high (VIH) to select the Device Code byte.

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