AT27C256R-12JI

AT27C256R-12JI Datasheet


The AT27C256R is a low-power, high-performance 262,144-bit one-time programmable 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.

Part Datasheet
AT27C256R-12JI AT27C256R-12JI AT27C256R-12JI (pdf)
Related Parts Information
AT27C256R-12PA AT27C256R-12PA AT27C256R-12PA
AT27C256R-15PA AT27C256R-15PA AT27C256R-15PA
AT27C256R-70PA AT27C256R-70PA AT27C256R-70PA
AT27C256R-90PA AT27C256R-90PA AT27C256R-90PA
AT27C256R-70JI AT27C256R-70JI AT27C256R-70JI
AT27C256R-55TI AT27C256R-55TI AT27C256R-55TI
AT27C256R-55TC AT27C256R-55TC AT27C256R-55TC
AT27C256R-55RC AT27C256R-55RC AT27C256R-55RC
AT27C256R-45TI AT27C256R-45TI AT27C256R-45TI
AT27C256R-55JI AT27C256R-55JI AT27C256R-55JI
AT27C256R-55JC AT27C256R-55JC AT27C256R-55JC
AT27C256R-70PI AT27C256R-70PI AT27C256R-70PI
AT27C256R-90PI AT27C256R-90PI AT27C256R-90PI
AT27C256R-55PC AT27C256R-55PC AT27C256R-55PC
AT27C256R-70RI AT27C256R-70RI AT27C256R-70RI
AT27C256R-70TC AT27C256R-70TC AT27C256R-70TC
AT27C256R-70TI AT27C256R-70TI AT27C256R-70TI
AT27C256R-90JC AT27C256R-90JC AT27C256R-90JC
AT27C256R-45TC AT27C256R-45TC AT27C256R-45TC
AT27C256R-90PC AT27C256R-90PC AT27C256R-90PC
AT27C256R-55PI AT27C256R-55PI AT27C256R-55PI
AT27C256R-90RC AT27C256R-90RC AT27C256R-90RC
AT27C256R-90RI AT27C256R-90RI AT27C256R-90RI
AT27C256R-90TC AT27C256R-90TC AT27C256R-90TC
AT27C256R-90TI AT27C256R-90TI AT27C256R-90TI
AT27C256R-90JI AT27C256R-90JI AT27C256R-90JI
AT27C256R-12RC AT27C256R-12RC AT27C256R-12RC
AT27C256R-55RI AT27C256R-55RI AT27C256R-55RI
AT27C256R-45RI AT27C256R-45RI AT27C256R-45RI
AT27C256R-12JC AT27C256R-12JC AT27C256R-12JC
AT27C256R-12PI AT27C256R-12PI AT27C256R-12PI
AT27C256R-12RI AT27C256R-12RI AT27C256R-12RI
AT27C256R-12TC AT27C256R-12TC AT27C256R-12TC
AT27C256R-12TI AT27C256R-12TI AT27C256R-12TI
AT27C256R-15JC AT27C256R-15JC AT27C256R-15JC
AT27C256R-15JI AT27C256R-15JI AT27C256R-15JI
AT27C256R-45JI AT27C256R-45JI AT27C256R-45JI
AT27C256R-45RC AT27C256R-45RC AT27C256R-45RC
AT27C256R-12PC AT27C256R-12PC AT27C256R-12PC
AT27C256R-15PC AT27C256R-15PC AT27C256R-15PC
AT27C256R-45PC AT27C256R-45PC AT27C256R-45PC
AT27C256R-45PI AT27C256R-45PI AT27C256R-45PI
AT27C256R-45JC AT27C256R-45JC AT27C256R-45JC
AT27C256R-15TI AT27C256R-15TI AT27C256R-15TI
AT27C256R-15TC AT27C256R-15TC AT27C256R-15TC
AT27C256R-15RI AT27C256R-15RI AT27C256R-15RI
AT27C256R-15RC AT27C256R-15RC AT27C256R-15RC
AT27C256R-15PI AT27C256R-15PI AT27C256R-15PI
AT27C256R-45RU AT27C256R-45RU AT27C256R-45RU
AT27C256R-45TU AT27C256R-45TU AT27C256R-45TU
AT27C256R-70RC AT27C256R-70RC AT27C256R-70RC
AT27C256R-70JC AT27C256R-70JC AT27C256R-70JC
AT27C256R-70PC AT27C256R-70PC AT27C256R-70PC
PDF Datasheet Preview
• 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, Industrial and Automotive Temperature Ranges

The AT27C256R is a low-power, high-performance 262,144-bit one-time programmable 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

Pin Configurations

PDIP, SOIC Top View

Pin Name A0 - A14 O0 - O7 CE OE NC

Function Addresses Outputs Chip Enable Output Enable No Connect

PLCC Top View
4 A7 3 A12 2 VPP 1 NC 32 VCC 31 A14 30 A13

A6 5 A5 6 A4 7 A3 8 A2 9 A1 10 A0 11 NC 12 O0 13
29 A8 28 A9 27 A11 26 NC 25 OE 24 A10 23 CE 22 O7 21 O6

O1 14 O2 15 GND 16 NC 17 O3 18 O4 19 O5 20

Note PLCC Package Pins 1 and 17 are DON’T CONNECT.

VPP 1 A12 2

A7 3 A6 4 A5 5 A4 6 A3 7 A2 8 A1 9 A0 10 O0 11 O1 12 O2 13 GND 14
28 VCC 27 A14 26 A13 25 A8 24 A9 23 A11 22 OE 21 A10 20 CE 19 O7 18 O6 17 O5 16 O4 15 O3

TSOP Top View Type 1

OE 22

A11 23

A9 24

A8 25

A13 26

A14 27

VCC 28
21 A10 20 CE 19 O7 18 O6 17 O5 16 O4 15 O3 14 GND 13 O2 12 O1 11 O0 10 A0
9 A1 8 A2
256K 32K x 8 OTP EPROM AT27C256R
256K EPROM

The AT27C256R is available in a choice of industry standard JEDEC-approved one time programmable OTP plastic DIP, PLCC, SOIC, and TSOP packages. All devices feature two-line control CE, OE to give designers the flexibility to prevent bus contention.

With 32K byte storage capability, the AT27C256R allows firmware to be stored reliably and to be accessed by the system without the delays of mass storage media.

Atmel’s 27C256R has additional features to ensure high quality and efficient production use. The Rapid Programming 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.

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 transients may exceed data sheet limits, resulting in device non-conformance. At a minimum, a µF high frequency, 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 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

AT27C256R

AT27C256R

Absolute Maximum Ratings*
Ordering Information
tACC

ICC mA

Active Standby
Ordering Code

AT27C256R-45JC AT27C256R-45PC AT27C256R-45RC AT27C256R-45TC

AT27C256R-45JI AT27C256R-45PI AT27C256R-45RI AT27C256R-45TI

AT27C256R-55JC AT27C256R-55PC AT27C256R-55RC AT27C256R-55TC

AT27C256R-55JI AT27C256R-55PI AT27C256R-55RI AT27C256R-55TI

AT27C256R-70JC AT27C256R-70PC AT27C256R-70RC AT27C256R-70TC

AT27C256R-70JI AT27C256R-70PI AT27C256R-70RI AT27C256R-70TI

AT27C256R-70JA AT27C256R-70PA AT27C256R-70RA

AT27C256R

Package
32J 28P6 28R 28T
32J 28P6 28R 28T
32J 28P6 28R 28T
32J 28P6 28R 28T
32J 28P6 28R 28T
32J 28P6 28R 28T
32J 28P6 28R

Operation Range Commercial 0°C to 70°C

Industrial -40°C to 85°C

Commercial 0°C to 70°C

Industrial -40°C to 85°C

Commercial 0°C to 70°C

Industrial -40°C to 85°C

Automotive -40°C to 125°C
continued
32J 28P6 28R 28T

Package Type 32-Lead, Plastic J-Leaded Chip Carrier PLCC 28-Lead, Wide, Plastic Dual Inline Package PDIP 28-Lead, Wide, Plastic Gull Wing Small Outline SOIC 28-Lead, Thin Small Outline Package TSOP
Ordering Information Continued
tACC

ICC mA

Active Standby
Ordering Code

AT27C256R-90JC

AT27C256R-90PC

AT27C256R-90RC

AT27C256R-90TC

AT27C256R-90JI

AT27C256R-90PI

AT27C256R-90RI

AT27C256R-90TI

AT27C256R-90JA

AT27C256R-90PA

AT27C256R-90RA

AT27C256R-12JC

AT27C256R-12PC

AT27C256R-12RC

AT27C256R-12TC

AT27C256R-12JI

AT27C256R-12PI

AT27C256R-12RI

AT27C256R-12TI

AT27C256R-12JA

AT27C256R-12PA

AT27C256R-12RA

AT27C256R-15JC

AT27C256R-15PC

AT27C256R-15RC

AT27C256R-15TC

AT27C256R-15JI

AT27C256R-15PI

AT27C256R-15RI

AT27C256R-15TI

AT27C256R-15JA

AT27C256R-15PA

AT27C256R-15RA

Package
32J 28P6 28R 28T
32J 28P6 28R 28T
32J 28P6 28R
32J 28P6 28R 28T
32J 28P6 28R 28T
32J 28P6 28R
More datasheets: AT27C256R-55PI | AT27C256R-90RC | AT27C256R-90RI | AT27C256R-90TC | AT27C256R-90TI | AT27C256R-90JI | AT27C256R-12RC | AT27C256R-55RI | AT27C256R-45RI | AT27C256R-12JC


Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived AT27C256R-12JI Datasheet file may be downloaded here without warranties.

Datasheet ID: AT27C256R-12JI 518940