AT27BV400-15RC 반도체 회로 부품 판매점
4-Megabit 256K x 16 or 512K x 8 Unregulated Battery-Voltage High Speed OTP EPROM
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 ATMEL Corporation |
Features
• Fast Read Access Time - 120 ns
• Word-wide or Byte-wide Configurable
• Dual Voltage Range Operation
– Unregulated Battery Power Supply Range, 2.7V to 3.6V
or Standard 5V ± 10% Supply Range
• 4-Megabit Flash and Mask ROM Compatable
• Low Power CMOS Operation
– 20 µA Maximum Standby
– 10 mA Max. Active at 5 MHz for VCC = 3.6V
• JEDEC Standard Packages
– 44-Lead PLCC
– 44-Lead SOIC (SOP)
– 48-Lead TSOP (12 mm x 20 mm)
• High Reliability CMOS Technology
– 2,000 ESD Protection
– 200 mA Latchup Immunity
• Rapid™ Programming Algorithm - 50 µs/word (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 AT27BV400 is a high performance low-power, low-voltage 4,194,304-bit one time
programmable read only memory (OTP EPROM) organized as either 256K by 16 or
512K by 8 bits. It requires only one supply in the range of 2.7 to 3.6V in normal read
Pin Configurations
PLCC
(continued)
Pin Name
A0 - A17
O0 - O15
O15/A-1
BYTE/VPP
CE
OE
NC
Function
Addresses
Outputs
Output/Address
Byte Mode/
Program Supply
Chip Enable
Output Enable
No Connect
A4
A3
A2
A1
A0
CE
GND
OE
O0
O8
O1
7
8
9
10
11
12
13
14
15
16
17
39 A12
38 A13
37 A14
36 A15
35 A16
34 BYTE/VPP
33 GND
32 O15/A-1
31 07
30 O14
29 O6
TSOP
Type 1
SOIC (SOP)
NC
NC
A17
A7
A6
A5
A4
A3
A2
A1
A0
CE
GND
OE
O0
O8
O1
O9
O2
O10
O3
O11
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
44 NC
43 NC
42 A8
41 A9
40 A10
39 A11
38 A12
37 A13
36 A14
35 A15
34 A16
33 BYTE/VPP
32 GND
31 015/A-1
30 O7
29 O14
28 O6
27 O13
26 O5
25 O12
24 O4
23 VCC
A15 1
A14 2
A13 3
A12 4
A11 5
A10 6
A9 7
A8 8
NC 9
NC 10
NC 11
NC 12
NC 13
NC 14
NC 15
NC 16
A17 17
A7 18
A6 19
A5 20
A4 21
A3 22
A2 23
A1 24
48 A16
47 BYTE/VPP
46 GND
45 015/A-1
44 O7
43 O14
42 O6
41 O13
40 O5
39 O12
38 O4
37 VCC
36 O11
35 O3
34 O10
33 O2
32 O9
31 O1
30 O8
29 O0
28 OE
27 GND
26 CE
25 A0
4-Megabit
(256K x 16 or
512K x 8)
Unregulated
Battery-Voltage™
High Speed
OTP EPROM
AT27BV400
Preliminary
AT27BV400
Preliminary
Rev. 0989A–03/98
1
mode operation. The by-16 organization makes this part
ideal for portable and hand held 16- and 32-bit micropro-
cessor systems using either regulated or unregulated bat-
tery power.
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
accessed in less than 120ns. With a typical power dissipa-
tion of only 10 mW at 5mHZ and VCC = 3V, the AT27BV400
consumes less than one fifth the power of a standard 5V
EPROM.
Standby mode supply current is typically less than 1 mA at
3V. The AT27BV400 simplifies system design and
stretches battery lifetime even further by eliminating the
need for power supply regulation.
The AT27BV400 can be organized as either word-wide or
byte-wide. The organization is selected via the BYTE/VPP
pin. When BYTE/VPP is asserted high (VIH), the word-wide
organization is selected and the O15/A-1 pin is used for
O15 data output. When BYTE/VPP is asserted low (VIL),the
byte wide organization is selected and the O15/A-1 pin is
used for the address pin A-1. When the AT27BV400 is logi-
cally regarded as x16 (word-wide), but read in the byte-
wide mode, then with A-1= VIL the lower 8 bits of the 16-bit
word are selected with A-1 = VIH the upper 8 bits of the 16-
bit word are selected.
The AT27BV400 is available in industry standard JEDEC-
approved one-time programmable (OTP) PLCC, SOIC
(SOP), and TSOP packages. The device features two-line
control(CE,OE) to eliminate bus contention.
With high density 256K word or 512K byte storage capabil-
ity, the AT27BV400 allows firmware to be to be stored reli-
ably and to be accessed by the system without the delays
of mass storage media.
The AT27BV400 operating with VCC at 3.0V produces TTL
level outputs that are compatible with standard TTL logic
devices operating at VCC = 5V. 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 AT27BV400 has additional features that ensure
high quality and efficient production use. The RapidTM Pro-
gramming Algorithm reduces the time required to program
the part and guarantees reliable programming. Program-
ming time is typically only 50µs/word. The Integrated Prod-
uct Identification Code electronically identifies the device
and manufacturer. This feature is used by industry standard
programming equipment to select the proper programming
equipment and voltages. The AT27BV400 programs
exactly the same way as a standard 5V AT27C400 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.
Block Diagram
2 AT27BV400
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제조업체: ATMEL Corporation
( atmel )
AT27BV400-15RC battery
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관련 데이터시트
AT27BV400-15RC
4-Megabit 256K x 16 or 512K x 8 Unregulated Battery-Voltage High Speed OTP EPROM - ATMEL Corporation
AT27BV400-15RI
4-Megabit 256K x 16 or 512K x 8 Unregulated Battery-Voltage High Speed OTP EPROM - ATMEL Corporation