IC EEPROM 64KBIT 250NS 28SOIC

AT28BV64B-25SC

Manufacturer Part NumberAT28BV64B-25SC
DescriptionIC EEPROM 64KBIT 250NS 28SOIC
ManufacturerAtmel
AT28BV64B-25SC datasheet
 


Specifications of AT28BV64B-25SC

Format - MemoryEEPROMs - ParallelMemory TypeEEPROM
Memory Size64K (8K x 8)Speed250ns
InterfaceParallelVoltage - Supply2.7 V ~ 3.6 V
Operating Temperature0°C ~ 70°CPackage / Case28-SOIC (7.5mm Width)
Lead Free Status / RoHS StatusContains lead / RoHS non-compliantOther namesAT28BV64B25SC
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Features
Single 2.7V to 3.6V Supply
Hardware and Software Data Protection
Low Power Dissipation
– 15 mA Active Current
– 20 µA CMOS Standby Current
Fast Read Access Time – 200 ns
Automatic Page Write Operation
– Internal Address and Data Latches for 64 Bytes
– Internal Control Timer
Fast Write Cycle Times
– Page Write Cycle Time: 10 ms Maximum
– 1 to 64 Byte Page Write Operation
DATA Polling for End of Write Detection
High-reliability CMOS Technology
– Endurance: 100,000 Cycles
– Data Retention: 10 Years
JEDEC Approved Byte-wide Pinout
Industrial Temperature Ranges
Green (Pb/Halide-free) Packaging Only
1. Description
The AT28BV64B is a high-performance electrically erasable programmable read only-
memory (EEPROM). Its 64K of memory is organized as 8,192 words by 8 bits. Manu-
factured with Atmel’s advanced nonvolatile CMOS technology, the device offers
access times to 200 ns with power dissipation of just 54 mW. When the device is
deselected, the CMOS standby current is less than 20 µA.
The AT28BV64B 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 AT28BV64B has additional features to ensure high quality and manufactura-
bility. A software data protection mechanism guards against inadvertent writes. The
device also includes an extra 64 bytes of EEPROM for device identification or
tracking.
64K (8K x 8)
Battery-Voltage
Parallel
EEPROM
with Page Write
and Software
Data Protection
AT28BV64B
0299I–PEEPR–4/09

AT28BV64B-25SC Summary of contents

  • Page 1

    ... When the device is deselected, the CMOS standby current is less than 20 µA. The AT28BV64B 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

    ... SOIC Top View A12 GND 14 15 AT28BV64B 2 2.2 32-lead PLCC Top View Note: PLCC package pins 1 and 17 are Don’t Connect. 2.3 28-lead TSOP Top View VCC OE WE A11 A11 VCC NC OE A12 A10 I/O7 A5 I/O6 A4 I/O5 A3 I/O4 I/ ...

  • Page 3

    ... Read The AT28BV64B 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 systems ...

  • Page 4

    ... DATA Polling The AT28BV64B features DATA Polling to indicate the end of a write cycle. During a byte or page write cycle an attempted read of the last byte written will result in the complement of the written data to be presented on I/O7. Once the write cycle has been completed, true data is valid on all outputs, and the next write cycle may begin ...

  • Page 5

    ... Temperature Under Bias................................ -55°C to +125°C Storage Temperature ..................................... -65°C to +150°C All Input Voltages (including NC Pins) with Respect to Ground ...................................-0.6V to +6.25V All Output Voltages with Respect to Ground .............................-0. Voltage on OE and A9 with Respect to Ground ...................................-0.6V to +13.5V 0299I–PEEPR–4/09 AT28BV64B-20 -40°C - 85°C 2. ...

  • Page 6

    ... -100 µA OH (1)(2)(3)( after the address transition without impact on t ACC after the falling edge of CE without impact pF). L Min Max 0.6 2.0 0.45 2.0 AT28BV64B-20 Min Max 200 200 ACC after an address change CE ACC OE Units µA µA µ ...

  • 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% ...

  • Page 8

    ... Data, OE Hold Time DH OEH t Time to Data Valid DV t Write Pulse Width High WPH Notes Restriction 2. All byte write operations must be preceded by the SDP command sequence. 15. AC Write Waveforms 15.1 WE Controlled 15.2 CE Controlled AT28BV64B 8 Min Max Units 0 ns 100 200 ns 100 ns 0 ...

  • Page 9

    Page Mode Characteristics Symbol Parameter t Write Cycle Time WC t Address Set-up Time AS t Address Hold Time AH t Data Set-up Time DS t Data Hold Time DH t Write Pulse Width WP t Byte Load Cycle ...

  • Page 10

    ... Data Polling Characteristics Symbol Parameter t Data Hold Time Hold Time OEH ( Output Delay OE t Write Recovery Time WR Notes: 1. These parameters are characterized and not 100% tested. 2. See AC Read Characteristics. 20. Data Polling Waveforms AT28BV64B 10 (1)(2)(3) (1) Min Typ Max Units 0299I–PEEPR–4/09 ...

  • Page 11

    Toggle Bit Characteristics Symbol Parameter t Data Hold Time Hold Time OEH ( Output Delay High Pulse OEHP t Write Recovery Time WR Notes: 1. These parameters are characterized and ...

  • Page 12

    ... Plastic J-leaded Chip Carrier (PLCC) 28S 28-lead, 0.300" Wide, Plastic Gull Wing Small Outline (SOIC) 28T 28-lead, Plastic Thin Small Outline Package (TSOP) AT28BV64B 12 Ordering Code Package AT28BV64B-20JU 32J AT28BV64B-20SU 28S AT28BV64B-20TU 28T Package Type Operation Range Industrial (-40°C to 85°C) 0299I–PEEPR–4/09 ...

  • Page 13

    Packaging Information 24.1 32J – PLCC 1.14(0.045) X 45˚ 0.51(0.020)MAX 45˚ MAX (3X) Notes: 1. This package conforms to JEDEC reference MS-016, Variation AE. 2. Dimensions D1 and E1 do not include mold protrusion. Allowable protrusion is ...

  • Page 14

    ... SOIC Dimensions in Millimeters and (Inches). Controlling dimension: Millimeters. 2325 Orchard Parkway San Jose, CA 95131 R AT28BV64B 14 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 15

    TSOP Pin 1 Identifier Area e E Notes: 1. This package conforms to JEDEC reference MO-183. 2. Dimensions D1 and E do not include mold protrusion. Allowable protrusion 0.15 mm per side and on ...

  • Page 16

    ... 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 ...