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參數(shù)資料
| 型號： | AT27BV400-15TC |
| 廠商： | ATMEL CORP |
| 元件分類： | DRAM |
| 英文描述： | High Speed CMOS Logic 8-Stage Synchronous Down Counters 16-SOIC -55 to 125 |
| 中文描述： | 256K X 16 OTPROM, 150 ns, PDSO48 |
| 封裝： | 12 X 20 MM, PLASTIC, TSOP-48 |
| 文件頁數(shù)： | 2/11頁 |
| 文件大?。?/td> | 267K |
| 代理商： | AT27BV400-15TC |
AT27BV400
2
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 V
CC
= 2.7V, any word can be
accessed in less than 120ns. With a typical power dissipa-
tion of only 10 mW at 5mHZ and V
CC
= 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/V
PP
pin. When BYTE/V
PP
is asserted high (V
IH
), the word-wide
organization is selected and the O15/A-1 pin is used for
O15 data output. When BYTE/V
PP
is asserted low (V
IL
),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= V
IL
the lower 8 bits of the 16-bit
word are selected with A-1 = V
IH
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 V
CC
at 3.0V produces TTL
level outputs that are compatible with standard TTL logic
devices operating at V
CC
= 5V. At V
CC
= 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 Rapid
TM
Pro-
gramming Algorithm reduces the time required to program
the part and guarantees reliable programming. Program-
ming time is typically only 50
μ
s/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
μ
F high frequency,
low inherent inductance, ceramic capacitor should be uti-
lized for each device. This capacitor should be connected
between the V
CC
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
μ
F bulk electrolytic capacitor should
be utilized, again connected between the V
CC
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
相關PDF資料 |
PDF描述 |
|---|---|
| AT27BV400-15TI | 4-Megabit 256K x 16 or 512K x 8 Unregulated Battery-Voltage High Speed OTP EPROM |
| AT27BV4096-12JC | 4 Megabit 256K x 16 Unregulated Battery-Voltage High Speed OTP CMOS EPROM |
| AT27BV4096-12JI | High Speed CMOS Logic 4-Bit by 16-Word FIFO Register 16-PDIP -55 to 125 |
| AT27BV4096-12VC | High Speed CMOS Logic 4-Bit by 16-Word FIFO Register 16-PDIP -55 to 125 |
| AT27BV4096-12VI | High Speed CMOS Logic 4-Bit by 16-Word FIFO Register 16-SOIC -55 to 125 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AT27BV400-15TI | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:4-Megabit 256K x 16 or 512K x 8 Unregulated Battery-Voltage High Speed OTP EPROM |
| AT27BV4096 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:4 Megabit 256K x 16 Unregulated Battery-Voltage High Speed OTP CMOS EPROM |
| AT27BV4096-12JC | 功能描述:可擦除可編程ROM 4M bit RoHS:否 制造商:Maxim Integrated 類型: 存儲容量:1024 bit 組織:1 K x 1 接口類型: 工作電流:5 uA 編程電壓: 工作電源電壓:2.8 V to 6 V 最大工作溫度:+ 85 C 安裝風格:Through Hole 封裝 / 箱體:TO-92 |
| AT27BV4096-12JI | 功能描述:可擦除可編程ROM 4Mb (256Kx16) OTP 2.7-3.6V 120ns RoHS:否 制造商:Maxim Integrated 類型: 存儲容量:1024 bit 組織:1 K x 1 接口類型: 工作電流:5 uA 編程電壓: 工作電源電壓:2.8 V to 6 V 最大工作溫度:+ 85 C 安裝風格:Through Hole 封裝 / 箱體:TO-92 |
| AT27BV4096-12JU | 功能描述:可擦除可編程ROM 4Mb (256Kx16) OTP 2.7-3.6V 120ns RoHS:否 制造商:Maxim Integrated 類型: 存儲容量:1024 bit 組織:1 K x 1 接口類型: 工作電流:5 uA 編程電壓: 工作電源電壓:2.8 V to 6 V 最大工作溫度:+ 85 C 安裝風格:Through Hole 封裝 / 箱體:TO-92 |
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