24LC32A/SN Microchip Technology, 24LC32A/SN Datasheet - Page 9

• Manufacturer Part Number: 24LC32A/SN
• Description: IC EEPROM 32KBIT 400KHZ 8SOIC
• Manufacturer: Microchip Technology

Specifications of 24LC32A/SN

• Memory Size: 32K (4K x 8)
• Package / Case: 8-SOIC (3.9mm Width)
• Operating Temperature: 0°C ~ 70°C
• Format - Memory: EEPROMs - Serial
• Memory Type: EEPROM
• Speed: 400kHz
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 2.5 V ~ 5.5 V
• Organization: 4 K x 8
• Interface Type: I2C
• Maximum Clock Frequency: 0.1 MHz
• Access Time: 3500 ns
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.5 V
• Maximum Operating Current: 3 mA
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: 0 C
• Operating Supply Voltage: 2.5 V
• Package: 8SOIC N
• Density: 32 Kb
• Maximum Operating Frequency: 0.4 MHz
• Maximum Random Access Time: 900 ns
• Typical Operating Supply Voltage: 3.3|5 V
• Data Retention: 200(Min) Year
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

5.0
Since the device will not acknowledge during a write
cycle, this can be used to determine when the cycle is
complete (this feature can be used to maximize bus
throughput). Once the Stop condition for a write
command has been issued from the master, the device
initiates the internally-timed write cycle. ACK polling
can then be initiated immediately. This involves the
master sending a Start condition followed by the control
byte for a Write command (R/W = 0). If the device is still
busy with the write cycle, then no ACK will be returned.
If no ACK is returned, the Start bit and control byte must
be re-sent. If the cycle is complete, the device will
return the ACK and the master can then proceed with
the next Read or Write command. See Figure 5-1 for
flow diagram of this operation.
 2003 Microchip Technology Inc.
ACKNOWLEDGE POLLING
FIGURE 5-1:
24AA32A/24LC32A
Initiate Write Cycle
Send Control Byte
Write Command
with R/W = 0
Condition to
Acknowledge
Send Stop
Send Start
Did Device
(ACK = 0)?
Operation
Send
Next
ACKNOWLEDGE POLLING
FLOW
YES
NO
DS21713D-page 9