AT27BV256-90TI 반도체 회로 부품 판매점
256K 32K x 8 Unregulated Battery-Voltage High Speed OTP CMOS EPROM
|
|
 ATMEL Corporation |
AT27BV256
Features
Fast Read Access Time - 70 ns
•• Dual Voltage Range Operation
Unregulated Battery Power Supply Range, 2.7V to 3.6V
or Standard 5V ± 10% Supply Range
Pin Compatible with JEDEC Standard AT27C256
•• 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 VCC = 3.6V
JEDEC Standard Surface Mount Packages
32-Lead PLCC
28-Lead 330-mil SOIC
28-Lead TSOP
• High Reliability CMOS Technology
2,000V ESD Protection
200 mA Latchup Immunity
• Rapid™ Programming 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
256K (32K x 8)
Unregulated
Battery-Voltage™
High Speed
OTP
CMOS EPROM
The AT27BV256 is a high performance, low power, low voltage 262,144 bit one-time
programmable read only memory (OTP EPROM) organized as 32K by 8 bits. It re-
quires only one supply in the range of 2.7V to 3.6V in normal read mode operation,
making it ideal for fast, portable systems using either regulated or unregulated battery
power.
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 word can be
accessed in less than 70 ns. With a typical power dissipation of only 18 mW at 5 MHz
and VCC = 3V, the AT27BV256 consumes less than one fifth the power of a standard
5V EPROM.
(continued)
Pin Configurations
SOIC Top View
AT27BV256
Pin Name
A0 - A14
O0 - O7
CE
OE
NC
Function
Addresses
Outputs
Chip Enable
Output Enable
No Connect
PLCC Top View
TSOP Top View
Type 1
Note: PLCC Package Pins 1
and 17 are DON’T CONNECT.
0601A
3-3
Description (Continued)
Standby mode supply current is typically less than 1 µA at
3V. The AT27BV256 simplifies system design and
stretches battery lifetime even further by eliminating the
need for power supply regulation.
The AT27BV256 is available in industry standard JEDEC-
approved one-time programmable (OTP) plastic PLCC,
SOIC and TSOP packages. All devices feature two-line
control (CE, OE) to give designers the flexibility to prevent
bus contention.
The AT27BV256 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 AT27BV256 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/byte. 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 AT27BV256
programs exactly the same way as a standard 5V
AT27C256R 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.
3-4 AT27BV256
|
PDF 파일 내의 페이지 : 총 9 페이지
제조업체: ATMEL Corporation
( atmel )
AT27BV256-90TI battery
데이터시트 다운로드 :
[ AT27BV256-90TI.PDF ]
[ AT27BV256-90TI 다른 제조사 검색 ]
국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
[ 홈페이지 ]
IGBT, TR 모듈, SCR, 다이오드모듈, 각종 전력 휴즈
( IYXS, Powerex, Toshiba, Fuji, Bussmann, Eaton )
전력반도체 문의 : 010-3582-2743
관련 데이터시트
AT27BV256-90TC
256K 32K x 8 Unregulated Battery-Voltage High Speed OTP CMOS EPROM - ATMEL Corporation
AT27BV256-90TI
256K 32K x 8 Unregulated Battery-Voltage High Speed OTP CMOS EPROM - ATMEL Corporation