AT28C256-15SU Atmel, AT28C256-15SU Datasheet

IC EEPROM 256KBIT 150NS 28SOIC

AT28C256-15SU

Manufacturer Part Number
AT28C256-15SU
Description
IC EEPROM 256KBIT 150NS 28SOIC
Manufacturer
Atmel

Specifications of AT28C256-15SU

Format - Memory
EEPROMs - Parallel
Memory Type
EEPROM
Memory Size
256K (32K x 8)
Speed
150ns
Interface
Parallel
Voltage - Supply
4.5 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Package / Case
28-SOIC (7.5mm Width)
Organization
32 K x 8
Interface Type
SPI
Access Time
150 ns
Output Enable Access Time
70 ns
Supply Voltage (max)
5.5 V
Supply Voltage (min)
4.5 V
Maximum Operating Current
50 mA
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Operating Supply Voltage
5 V
Capacitance, Input
4 pF
Capacitance, Output
8 pF
Current, Input, Leakage
10 μA
Current, Operating
50 mA
Current, Output, Leakage
10
Data Retention
10 yrs.
Density
256K
Package Type
SOIC
Power Dissipation
440 mW
Temperature, Operating
-40 to +85 °C
Time, Access
150 ns
Time, Address Hold
50
Voltage, Input, High
2 V
Voltage, Input, Low
0.8 V
Voltage, Output, High
2.4 V
Voltage, Output, Low
0.45 V
Voltage, Supply
5 V
Access Time (max)
150ns
Write Protection
Yes
Operating Supply Voltage (typ)
5V
Operating Temp Range
-40C to 85C
Supply Current
50mA
Operating Supply Voltage (min)
4.5V
Operating Supply Voltage (max)
5.5V
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
28
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AT28C256-15SU
Manufacturer:
ATMEL
Quantity:
20
Part Number:
AT28C256-15SU
Manufacturer:
ATMEL
Quantity:
200
Part Number:
AT28C256-15SU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Features
1. Description
The AT28C256 is a high-performance electrically erasable and programmable read-
only memory. Its 256K of memory is organized as 32,768 words by 8 bits. Manufac-
tured with Atmel’s advanced nonvolatile CMOS technology, the device offers access
times to 150 ns with power dissipation of just 440 mW. When the device is deselected,
the CMOS standby current is less than 200 µA.
The AT28C256 is accessed like a Static RAM for the read or write cycle without the
need for external components. The device contains a 64-byte page register to allow
writing of up to 64 bytes simultaneously. During a write cycle, the addresses and 1 to
64 bytes of data are internally latched, freeing the address and data bus for other
operations. Following the initiation of a write cycle, the device will automatically write
the latched data using an internal control timer. The end of a write cycle can be
detected by DATA Polling of I/O7. Once the end of a write cycle has been detected a
new access for a read or write can begin.
Atmel’s AT28C256 has additional features to ensure high quality and manufacturabil-
ity. The device utilizes internal error correction for extended endurance and improved
data retention characteristics. An optional software data protection mechanism is
available to guard against inadvertent writes. The device also includes an extra
64 bytes of EEPROM for device identification or tracking.
Fast Read Access Time – 150 ns
Automatic Page Write Operation
Fast Write Cycle Times
Low Power Dissipation
Hardware and Software Data Protection
DATA Polling for End of Write Detection
High Reliability CMOS Technology
Single 5V ± 10% Supply
CMOS and TTL Compatible Inputs and Outputs
JEDEC Approved Byte-wide Pinout
Full Military and Industrial Temperature Ranges
Green (Pb/Halide-free) Packaging Option
– Internal Address and Data Latches for 64 Bytes
– Internal Control Timer
– Page Write Cycle Time: 3 ms or 10 ms Maximum
– 1 to 64-byte Page Write Operation
– 50 mA Active Current
– 200 µA CMOS Standby Current
– Endurance: 10
– Data Retention: 10 Years
4
or 10
5
Cycles
256K (32K x 8)
Paged Parallel
EEPROM
AT28C256

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AT28C256-15SU Summary of contents

Page 1

... When the device is deselected, the CMOS standby current is less than 200 µA. The AT28C256 is accessed like a Static RAM for the read or write cycle without the need for external components. The device contains a 64-byte page register to allow writing bytes simultaneously ...

Page 2

... I/O CC Ind 0. Mil 2. MHz OUT -400 µA OH AT28C256 AT28C256-25 AT28C256-35 -55°C - 125°C -55°C - 125°C 5V ± 10% 5V ± 10 High High Z V High Z IL Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent dam- age to the device. This is a stress rating only and ...

Page 3

... AT28C256-20 Min Max Min Max 150 200 150 200 (1)(2)(3)( after the address transition without impact after the falling edge of CE without impact pF). L AT28C256-25 AT28C256-35 Min Max Min Max 250 350 250 350 80 0 100 0 100 ACC after an address change CE ...

Page 4

... Input Test Waveforms and Measurement Level 12. Output Test Load 13. Pin Capacitance ( MHz 25°C Symbol Typ OUT Note: 1. This parameter is characterized and is not 100% tested < Max 6 12 AT28C256 Units Conditions OUT 7 ...

Page 5

... Address Hold Time AH t Chip Select Setup Time CS t Chip Select Hold Time CH t Write Pulse Width ( Data Setup Time Data, OE Hold Time DH OEH t Time to Data Valid DV Note Restriction 15. AC Write Waveforms 15.1 WE Controlled 15.2 CE Controlled AT28C256 8 Min Max Units 100 (1) NR ...

Page 6

... A6 through A14 must specify the same page address during each high to low transition of WE (or CE must be high only when WE and CE are both low. 18. Chip Erase Waveforms µsec (min msec (min 12.0V ± 0.5V H Min AT28C256 AT28C256F 100 50 (1)(2) AT28C256 Max Units 150 µ ...

Page 7

... Plastic Thin Small Outline Package (TSOP) Blank Standard Device: Endurance = 10K Write Cycles; Write Time = Fast Write Option: Write Time = 3 ms Ordering Code AT28C256(E, F)-15JU AT28C256(E, F)-15PU AT28C256(E, F)-15SU AT28C256(E, F)-15TU Package Type Options AT28C256 Package Operation Range 32J Industrial 28P6 (-40° ...

Page 8

... SOIC Dimensions in Millimeters and (Inches). Controlling dimension: Millimeters. TITLE 2325 Orchard Parkway 28S, 28-lead, 0.300" Body, Plastic Gull Wing Small Outline (SOIC) San Jose, CA 95131 JEDEC Standard MS-013 R AT28C256 24 0.51(0.020) 0.33(0.013) 7.60(0.2992) 7.40(0.2914) PIN 1 1.27(0.50) BSC TOP VIEW 18.10(0.7125) 17 ...

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