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PDF T24C32A Data sheet ( Hoja de datos )

Número de pieza T24C32A
Descripción EEPROM
Fabricantes BrightMoon Semiconductor 
Logotipo BrightMoon Semiconductor Logotipo



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No Preview Available ! T24C32A Hoja de datos, Descripción, Manual

Features
Wide Voltage Operation
- VCC = 1.8V to 5.5V
Operating Ambient Temperature: -40to +85
Internally Organized:
- T24C32A, 4096 X 8 (32K bits)
- T24C64A, 8192 X 8 (64K bits)
Two-wire Serial Interface
Schmitt Trigger, Filtered Inputs for Noise Suppression
Bidirectional Data Transfer Protocol
1 MHz (5V), 400 kHz (1.8V, 2.5V, 2.7V) Compatibility
Write Protect Pin for Hardware Data Protection
32-byte Page (32K, 64K) Write Modes
Partial Page Writes Allowed
Self-timed Write Cycle (5 ms max)
High-reliability
- Endurance: 1 Million Write Cycles
- Data Retention: 100 Years
8-lead PDIP, 8-lead SOP and 8-lead TSSOP Packages
Die Sales: Wafer Form, Waffle Pack
T24C32A T24C64A
General Description
The T24C32A/T24C64A provides 32,768/65,536 bits of serial electrically erasable and programmable
read-only memory (EEPROM) organized as 4096/8192 words of 8 bits each. The device is optimized
for use in many industrial and commercial applications where low-power and low-voltage operations
are essential. The T24C32A/T24C64A is available in space-saving 8-lead PDIP, 8-lead SOP, and
8-lead TSSOP packages and is accessed via a two-wire serial interface.
Pin Configuration
BrightMoon Semiconductor Co.,Ltd.
Http://www.bmsemi.com
Tel: 0755-86531933 Fax: 0755-86531633
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T24C32A pdf
T24C32A T24C64A
Device Addressing
The 32K and 64K EEPROM devices all require an 8-bit device address word following a start
condition to enable the chip for a read or write operation (see to Figure 4 on page 7).
The device address word consists of a mandatory "1", "0" sequence for the first four most significant
bits as shown. This is common to all the Serial EEPROM devices.
The next 3 bits are the A2, A1 and A0 device address bits for the 32K/64K EEPROM. These 3 bits
must compare to their corresponding hardwired input pins.
The eighth bit of the device address is the read/write operation select bit. A read operation is initiated
if this bit is high and a write operation is initiated if this bit is low.
Upon a compare of the device address, the EEPROM will output a "0". If a compare is not made, the
chip will return to a standby state.
Write Operations
BYTE WRITE: A write operation requires two 8-bit data word address following the device address
word and acknowledgment. Upon receipt of this address, the EEPROM will again respond with a "0"
and then clock in the first 8-bit data word. Following receipt of the 8-bit data word, the EEPROM will
output a "0" and the addressing device, such as a microcontroller, must terminate the write sequence
with a stop condition. At this time the EEPROM enters an internally timed write cycle, tWR, to the
nonvolatile memory. All inputs are disabled during this write cycle and the EEPROM will not respond
until the write is complete (see Figure 5 on page 7).
PAGE WRITE: The 32K/64K EEPROM is capable of a 32-byte page write.
A page write is initiated the same as a byte write, but the microcontroller does not send a stop
condition after the first data word is clocked in. Instead, after the EEPROM acknowledges receipt of
the first data word, the microcontroller can transmit up to 31 (32K, 64K) more data words. The
EEPROM will respond with a "0" after each data word received. The microcontroller must terminate
the page write sequence with a stop condition (see Figure 6 on page 8).
The data word address lower five (32K, 64K) bits are internally incremented following the receipt of
each data word. The higher data word address bits are not incremented, retaining the memory page
row location. When the word address, internally generated, reaches the page boundary, the following
byte is placed at the beginning of the same page. If more than 32 (32K, 64K) data words are
transmitted to the EEPROM, the data word address will "roll over" and previous data will be
overwritten.
ACKNOWLEDGE POLLING: Once the internally timed write cycle has started and the EEPROM
inputs are disabled, acknowledge polling can be initiated. This involves sending a start condition
followed by the device address word. The read/write bit is representative of the operation desired.
Only if the internal write cycle has completed will the EEPROM respond with a "0", allowing the read
or write sequence to continue.
Read Operations
Read operations are initiated the same way as write operations with the exception that the read/write
select bit in the device address word is set to "1". There are three read operations: current address read,
random address read and sequential read.
BrightMoon Semiconductor Co.,Ltd.
Http://www.bmsemi.com
Tel: 0755-86531933 Fax: 0755-86531633
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T24C32A arduino
Ordering Information
Part Number
T
1
Code Number
24 XXX - X X
2 3 45
1.Prefix
2.Series Name
24:Two-wire (I2C) Interface
3.EEPROM Density
C32=32K bits
C04=64K bits
4.Ooperating Votage
A=1.8V-5.5V
5.Temperature Range
I=Ind Temp (-40-85)
E=Exp Temp (-40-125)
T24C32A T24C64A
BrightMoon Semiconductor Co.,Ltd.
Http://www.bmsemi.com
Tel: 0755-86531933 Fax: 0755-86531633
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