AT27BV1024-90JC View Datasheet(PDF) - Atmel Corporation

Part Name

Description

View to exact match

AT27BV1024-90JC

1 Megabit (64K x 16) Unregulated Battery-Voltage™ High Speed OTP CMOS EPROM

Atmel Corporation 

Description (Continued)

Atmel’s innovative design techniques provide fast speeds

that rival 5V parts while keeping the low power consump-

tion of a 3V supply. At VCC = 2.7V, any word can be ac-

cessed in less than 120 ns. With a typical power dissipa-

tion of only 18 mW at 5 MHz and VCC = 3 V , t h e

AT27BV1024 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 AT27BV1024 simplifies system design and

stretches battery lifetime even further by eliminating the

need for power supply regulation.

The AT27BV1024 is available in industry standard

JEDEC-approved one-time programmable (OTP) plastic

PLCC and TSOP packages. All devices feature two-line

control (CE, OE) to give designers the flexibility to prevent

bus contention.

The AT27BV1024 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 bat-

tery operation (LVBO) interface specifications. The device

is also capable of standard 5-volt operation making it ide-

ally suited for dual supply range systems or card products

that are pluggable in both 3-volt and 5-volt hosts.

Atmel’s AT27BV1024 has additional features to ensure

high quality and efficient production use. The Rapid™ Pro-

gramming Algorithm reduces the time required to program

the part and guarantees reliable programming. Program-

ming time is typically only 100 µs/word. The Integrated

Product Identification Code electronically identifies the de-

vice and manufacturer. This feature is used by industry

standard programming equipment to select the proper

programming algorithms and voltages. The AT27BV1024

programs exactly the same way as a standard 5V

AT27C1024 and uses the same programming equipment.

System Considerations

Switching between active and standby conditions via the

Chip Enable pin may produce transient voltage excur-

sions. Unless accommodated by the system design, these

transients may exceed data sheet limits, resulting in de-

vice non-conformance. At a minimum, a 0.1 µF high fre-

quency, 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 posi-

tioned as close as possible to the point where the power

supply is connected to the array.

3-34

AT27BV1024

Share Link: