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27C256RのメーカーはATMEL Corporationです、この部品の機能は「256K 32K x 8 OTP CMOS EPROM」です。 |
部品番号 | 27C256R |
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部品説明 | 256K 32K x 8 OTP CMOS EPROM | ||
メーカ | ATMEL Corporation | ||
ロゴ | |||
このページの下部にプレビューと27C256Rダウンロード(pdfファイル)リンクがあります。 Total 9 pages
AT27C256R
Features
Fast Read Access Time - 45 ns
•• Low Power CMOS Operation
100 µA max. Standby
20 mA max. Active at 5 MHz
• JEDEC Standard Packages
28-Lead 600-mil PDIP
32-Lead PLCC
28-Lead TSOP and SOIC
• 5V ± 10% Supply
• 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
• Integrated Product Identification Code
•• Commercial and Industrial Temperature Ranges
Description
The AT27C256R is a low-power, high performance 262,144 bit one-time programma-
ble read only memory (OTP EPROM) organized 32K by 8 bits. It requires only one
5V power supply in normal read mode operation. Any byte can be accessed in less
than 45 ns, eliminating the need for speed reducing WAIT states on high performance
microprocessor systems.
Atmel’s scaled CMOS technology provides low active power consumption, and fast
programming. Power consumption is typically only 8 mA in Active Mode and less
than 10 µA in Standby.
(continued)
256K (32K x 8)
OTP
CMOS
EPROM
Pin Configurations
Pin Name Function
A0 - A14 Addresses
O0 - O7 Outputs
CE Chip Enable
OE Output Enable
NC No Connect
PDIP, SOIC Top View
AT27C256R
PLCC Top View
TSOP Top View
Type 1
Note: PLCC Package Pins 1 and
17 are DON’T CONNECT.
0014G
3-125
1 Page Block Diagram
AT27C256R
Absolute Maximum Ratings*
Temperature Under Bias ................ -55°C to +125°C
Storage Temperature...................... -65°C to +150°C
Voltage on Any Pin with
Respect to Ground......................... -2.0V to +7.0V (1)
Voltage on A9 with
Respect to Ground ...................... -2.0V to +14.0V (1)
VPP Supply Voltage with
Respect to Ground....................... -2.0V to +14.0V (1)
*NOTICE: Stresses beyond those listed under “Absolute Maxi-
mum Ratings” may cause permanent damage to the device.
This is a stress rating only and functional operation of the
device at these or any other conditions beyond those indi-
cated in the operational sections of this specification is not
implied. Exposure to absolute maximum rating conditions
for extended periods may affect device reliability.
Note:
1. Minimum voltage is -0.6V dc which may undershoot
to -2.0V for pulses of less than 20 ns. Maximum out-
put pin voltage is VCC + 0.75V dc which may over-
shoot to +7.0V for pulses of less than 20 ns.
Operating Modes
Mode \ Pin
Read
Output Disable
Standby
Rapid Program (2)
PGM Verify (2)
Optional PGM Verify (2)
PGM Inhibit (2)
CE
VIL
VIL
VIH
VIL
X (1)
VIL
VIH
Product Identification (4)
VIL
Notes: 1. X can be VIL or VIH.
2. Refer to Programming characteristics.
3. VH = 12.0 ± 0.5V.
OE
VIL
VIH
X (1)
VIH
VIL
VIL
VIH
VIL
Ai VPP Outputs
Ai
X (1)
X (1)
VCC
VCC
VCC
DOUT
High Z
High Z
Ai
VPP
DIN
Ai
VPP
DOUT
Ai
X (1)
A9 = VH (3)
A0 = VIH or VIL
A1 - A14 = VIL
VCC
VPP
DOUT
High Z
VCC
Identification
Code
4. Two identifier bytes may be selected. All Ai inputs
are held low (VIL), except A9 which is set to VH and A0
which is toggled low (VIL) to select the Manufacturer’s Identi-
fication byte and high (VIH) to select the Device Code byte.
3-127
3Pages Programming Waveforms (1)
Notes: 1. The Input Timing Reference is 0.8V for VIL and
2.0V for VIH.
2. tOE and tDFP are characteristics of the device but
must be accommodated by the programmer.
3. When programming the AT27C256R a 0.1 µF capacitor is
required across VPP and ground to suppress spurious voltage
transients.
DC Programming Characteristics
TA = 25 ± 5°C, VCC = 6.5 ± 0.25V, VPP = 13.0 ± 0.25V
Symbol
ILI
VIL
VIH
VOL
VOH
ICC2
IPP2
VID
Parameter
Input Load Current
Input Low Level
Input High Level
Output Low Volt.
Output High Volt.
VCC Supply Current
(Program and Verify)
VPP Current
A9 Product Identification Voltage
Test
Conditions
VIN = VIL,VIH
IOL = 2.1 mA
IOH = -400 µA
CE = VIL
3-130 AT27C256R
Limits
Min Max
±10
-0.6 0.8
2.0 VCC + 1
0.4
2.4
25
25
11.5 12.5
Units
µA
V
V
V
V
mA
mA
V
6 Page | |||
ページ | 合計 : 9 ページ | ||
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PDF ダウンロード | [ 27C256R データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
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