AT27BV020-12TI 반도체 회로 부품 판매점
2-Megabit 256K x 8 Unregulated Battery-Voltage High Speed OTP EPROM
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 ATMEL Corporation |
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 VCC = 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
• 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
The AT27BV020 is a high-performance, low-power, low-voltage 2,097,152-bit one-
time 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
1234567
A0 - A17
O0 - O7
CE
OE
PGM
Address
Outputs
Chip Enable
Output Enable
Program Strobe
PLCC, Top View
A
GND O6 VCC VCC O2 OE GND
B
A17 O7 O4 NC NC O0 CE
C
A10 NC O5 NC O3 O1 A0
D
A14 A13 A9 NC NC A6 A3
E
A16 A11 PGM NC A7 A4 A1
F
A15 A12 A8 NC VPP A5 A2
AT27BV020
2-Megabit
(256K x 8)
Unregulated
Battery-Voltage™
High Speed
OTP EPROM
AT27BV020
TSOP, VSOP Top View
Type 1
0902A-A–10/97
1
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 byte can be
accessed in less than 90 ns. With a typical power dissipa-
tion 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 design-
ers 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 oper-
ation (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 Rapid™ Program-
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 tran-
sients 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 uti-
lized 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
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( atmel )
AT27BV020-12TI battery
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관련 데이터시트
AT27BV020-12TC
2-Megabit 256K x 8 Unregulated Battery-Voltage High Speed OTP EPROM - ATMEL Corporation
AT27BV020-12TI
2-Megabit 256K x 8 Unregulated Battery-Voltage High Speed OTP EPROM - ATMEL Corporation