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PDF AT28BV64B Data sheet ( Hoja de datos )
| Número de pieza | AT28BV64B | |
| Descripción | 64K (8K x 8) Battery-Voltage Parallel EEPROM | |
| Fabricantes | ATMEL Corporation | |
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Features
• Single 2.7V to 3.6V Supply
• Hardware and Software Data Protection
• Low Power Dissipation
– 15mA Active Current
– 20µA CMOS Standby Current
• Fast Read Access Time – 200ns
• 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 Atmel® 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. Manufactured with Atmel’s advanced nonvolatile CMOS technology, the device
offers access times to 200ns with power dissipation of just 54 mW. When the device is
deselected, the CMOS standby current is less than 20µA.
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 manufactur-
ability. 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
Atmel-0299K-PEEPROM-AT28BV64B-Datasheet_072014
1 page  
AT28BV64B
5. DC and AC Operating Range
Operating Temperature (Case)
VCC Power Supply
AT28BV64B-20
-40C - 85C
2.7V to 3.6V
6. Operating Modes
Mode
Read
Write(2)
Standby/Write Inhibit
Write Inhibit
Write Inhibit
Output Disable
Chip Erase
Notes:
1. X can be VIL or VIH.
2. Refer to AC Programming Waveforms.
3. VH = 12.0V ± 0.5V.
CE
VIL
VIL
VIH
X
X
X
VIL
OE
VIL
VIH
X(1)
X
VIL
VIH
VH(3)
WE I/O
VIH DOUT
VIL DIN
X High Z
VIH
X
X High Z
VIL High Z
7. Absolute Maximum Ratings*
Temperature Under Bias ............................... -55C to +125C
Storage Temperature..................................... -65C to +150C
All Input Voltages
(including NC Pins)
with Respect to Ground ...................................-0.6V to +6.25V
All Output Voltages
with Respect to Ground .............................-0.6V to VCC + 0.6V
Voltage on OE and A9
with Respect to Ground ...................................-0.6V to +13.5V
*NOTICE:
Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent dam-
age to the device. This is a stress rating only and
functional operation of the device at these or any
other conditions beyond those indicated in the
operational sections of this specification is not
implied. Exposure to absolute maximum rating
conditions for extended periods may affect
device reliability
Atmel-0299K-PEEPROM-AT28BV64B-Datasheet_072014
5
5 Page 
21. Toggle Bit Characteristics(1)
Symbol Parameter
tDH
tOEH
tOE
tOEHP
tWR
Notes:
Data Hold Time
OE Hold Time
OE to Output Delay(2)
OE High Pulse
Write Recovery Time
1. These parameters are characterized and not 100% tested.
2. See AC Read Characteristics.
22. Toggle Bit Waveforms
AT28BV64B
Min Typ Max Units
10 ns
10 ns
ns
150 ns
0 ns
Notes:
1. Toggling either OE or CE or 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.
Atmel-0299K-PEEPROM-AT28BV64B-Datasheet_072014
11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet AT28BV64B.PDF ] | |
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