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
0006M–PEEPR–12/09

Related parts for AT28C256-15SU

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

... OE 1 A11 A13 VCC 7 A14 8 A12 2.2 28-lead PGA Top View AT28C256 2 Function Addresses Chip Enable Output Enable Write Enable Data Inputs/Outputs No Connect Don’t Connect 2.3 32-pad LCC, 28-lead PLCC Top View 28 A10 I/O7 25 I/O6 24 I/O5 23 I/O4 22 I/O3 21 GND 20 I/O2 ...

Page 3

... Read The AT28C256 is accessed like a Static RAM. When CE and OE are low and WE is high, the data stored at the memory location determined by the address pins is asserted on the outputs. The outputs are put in the high impedance state when either high. This dual-line control gives designers flexibility in preventing bus contention in their system ...

Page 4

... After writing the 3-byte command sequence and after t protected against inadvertent write operations. It should be noted, that once protected the host may still perform a byte or page write to the AT28C256. This is done by preceding the data to be written by the same 3-byte command sequence used to enable SDP. ...

Page 5

... 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 6

... AT28C256-15 AT28C256-20 Min Max Min 150 150 (1)(2)(3)( after the address transition without impact on t ACC after the falling edge of CE without impact pF). L AT28C256-25 AT28C256-35 Max Min Max Min Max 200 250 350 200 250 350 80 0 100 0 100 ACC ...

Page 7

... 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. 0006M–PEEPR–12/ < Max 6 12 AT28C256 Units Conditions OUT 7 ...

Page 8

... 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 0006M–PEEPR–12/09 ...

Page 9

... 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 0006M–PEEPR–12/09 Min AT28C256 AT28C256F 100 50 (1)(2) AT28C256 Max Units 150 µ ...

Page 10

... Software Protected Write Cycle Waveforms Notes through A14 must specify the same page address during each high to low transition of WE (or CE) after the software code has been entered must be high only when WE and CE are both low. AT28C256 10 20. Software Data Protection Disable Algorithm (2) ...

Page 11

... Toggle Bit Waveforms Notes: 1. Toggling either both OE and CE will operate toggle bit. 2. Beginning and ending state of I/O6 will vary. 3. Any address location may be used but the address should not vary. 0006M–PEEPR–12/09 (1) 6. (1) 6. (1)(2)(3) AT28C256 Min Typ Max Min Typ Max 10 ...

Page 12

... Normalized I Graphs CC AT28C256 12 0006M–PEEPR–12/09 ...

Page 13

... XX 5962-88525 04 XX AT28C256-20FM/883 (1) 5962-88525 12 ZX 5962-88525 04 ZX AT28C256-20LM/883 (1) 5962-88525 12 YX 5962-88525 04 YX AT28C256-20UM/883 (1) 5962-88525 12 UX 5962-88525 04 UX AT28C256-25DM/883 0.3 (1) 5962-88525 11 XX 5962-88525 03 XX AT28C256-25FM/883 (1) 5962-88525 11 ZX 5962-88525 03 ZX AT28C256-25LM/883 (1) 5962-88525 11 YX 5962-88525 03 YX AT28C256-25UM/883 (1) 5962-88525 11 UX 5962-88525 03 UX ...

Page 14

... XX AT28C256E-15FM/883 (1) 5962-88525 16 ZX 5962-88525 08 ZX AT28C256E-15LM/883 (1) 5962-88525 16 YX 5962-88525 08 YX AT28C256E-15UM/883 (1) 5962-88525 16 UX 5962-88525 08 UX AT28C256E-20DM/883 0.3 AT28C256E-20FM/883 AT28C256E-20LM/883 AT28C256E-20UM/883 AT28C256E-25DM/883 0.3 (1) 5962-88525 13 XX 5962-88525 05 XX 5962-88525 05 XX (1) 5962-88525 13 ZX 5962-88525 05 ZX AT28C256E-25LM/883 (1) 5962-88525 13 YX 5962-88525 05 YX AT28C256E-25UM/883 (1) 5962-88525 13 UX ...

Page 15

... Ordering Code 0.3 AT28C256F-15DM/883 (3) 5962-88525 15 XX 5962-88525 07 XX AT28C256F-15FM/883 (3) 5962-88525 15 ZX 5962-88525 07 ZX AT28C256F-15LM/883 (3) 5962-88525 15 YX 5962-88525 07 YX AT28C256F-15UM/883 (3) 5962-88525 15 UX 5962-88525 07 UX Package Type Options AT28C256 Package Operation Range 28D6 28F Military/883C Class B, Fully Compliant (-55°C to 125°C) 32L ...

Page 16

... High Endurance Option: Endurance = 100K Write Cycles F Fast Write Option: Write Time = 3 ms 28. Die Products Reference Section: Contact Atmel sales for die sales options. AT28C256 16 Ordering Code 0.2 AT28C256-15JU AT28C256-15PU AT28C256-15SU AT28C256-15TU Ordering Code 0.2 AT28C256E-15JU AT28C256E-15SU AT28C256E-15TU Ordering Code 0.2 AT28C256F-15JU AT28C256F-15SU ...

Page 17

... San Jose, CA 95131 R 0006M–PEEPR–12/09 37.85(1.490) 36.58(1.440) 33.02(1.300) REF 1.65(0.065) 1.14(0.045) 15.70(0.620) 15.00(0.590) 0º~ 15º REF 17.80(0.700) MAX TITLE 28D6, 28-lead, 0.600" Wide, Non-windowed, Ceramic Dual Inline Package (Cerdip) AT28C256 PIN 1 15.49(0.610) 12.95(0.510) 0.127(0.005)MIN 1.52(0.060) 0.38(0.015) 0.66(0.026) 0.36(0.014) DRAWING NO. 10/23/03 REV. 28D6 B ...

Page 18

... Dimensions in Millimeters and (Inches). Controlling dimension: Inches. MIL-STD 1835 F-12 Config B PIN #1 ID 18.49(0.728) 18.08(0.712) 10.57(0.416) 0.23(0.009) 0.10(0.004) 2325 Orchard Parkway San Jose, CA 95131 R AT28C256 18 9.75(0.384) 1.96(0.077) 1.09(0.043) 7.26(0.286) 6.96(0.274) TITLE 28F, 28-lead, Non-windowed, Ceramic Bottom-brazed Flat Package (FlatPack) 9.40(0.370) 6.35(0.250) ...

Page 19

... Lead coplanarity is 0.004" (0.102 mm) maximum. 2325 Orchard Parkway San Jose, CA 95131 R 0006M–PEEPR–12/09 1.14(0.045 PIN NO. 1 IDENTIFIER TITLE 32J, 32-lead, Plastic J-leaded Chip Carrier (PLCC) AT28C256 0.318(0.0125) 0.191(0.0075 COMMON DIMENSIONS (Unit of Measure = mm) MIN NOM MAX SYMBOL A 3.175 – ...

Page 20

... LCC Dimensions in Millimeters and (Inches). Controlling dimension: Inches. MIL-STD 1835 C-12 14.22(0.560) 13.72(0.540) 10.16(0.400) BSC 1.27(0.050) TYP 2325 Orchard Parkway San Jose, CA 95131 R AT28C256 20 11.63(0.458) 11.23(0.442) PIN 1 1.40(0.055) 1.14(0.045) 2.41(0.095) 1.91(0.075) 0.305(0.012) 0.178(0.007) 0.737(0.029) 0.533(0.021) 1.02(0.040) X 45˚ ...

Page 21

... A1 0.381 – D 36.703 – E 15.240 – E1 13.462 – B 0.356 – B1 1.041 – L 3.048 – C 0.203 – eB 15.494 – e 2.540 TYP DRAWING NO. AT28C256 MAX NOTE 4.826 – 37.338 Note 2 15.875 13.970 Note 2 0.559 1.651 3.556 0.381 17.526 09/28/01 REV. 28P6 B 21 ...

Page 22

... SOIC Dimensions in Millimeters and (Inches). Controlling dimension: Millimeters. 2325 Orchard Parkway San Jose, CA 95131 R AT28C256 22 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) 17.70(0.6969) 0.30(0.0118) 0.10(0.0040) 0º ~ 8º 1.27(0.050) 0.40(0.016) TITLE 28S, 28-lead, 0.300" Body, Plastic Gull Wing Small Outline (SOIC) JEDEC Standard MS-013 10 ...

Page 23

... Lead coplanarity is 0.10 mm maximum. 2325 Orchard Parkway San Jose, CA 95131 R 0006M–PEEPR–12/09 PIN SEATING PLANE A1 TITLE 28T, 28-lead (8 x 13.4 mm) Plastic Thin Small Outline Package, Type I (TSOP) AT28C256 0º ~ 5º GAGE PLANE COMMON DIMENSIONS (Unit of Measure = mm) SYMBOL MIN NOM MAX A – – ...

Page 24

... PGA Dimensions in Millimeters and (Inches). Controlling dimension: Inches. 16.71(0.658) 16.31(0.642) 2325 Orchard Parkway San Jose, CA 95131 R AT28C256 24 13.74(0.540) 2.57(0.101) 13.36(0.526) 2.06(0.081) 15.24(0.600) 14.88(0.586) 14.17(0.558) 13.77(0.542) 2.54(0.100) TYP 12.70(0.500) TYP 2.54(0.100) TYP 10.41(0.410) 9.91(0.390) TITLE 28U, 28-pin, Ceramic Pin Grid Array (PGA) 7 ...

Page 25

... Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN ATMEL’S TERMS AND CONDI- TIONS OF SALE LOCATED ON ATMEL’S WEB SITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORY WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT ...

Related keywords