ISL12025IBZ Intersil, ISL12025IBZ Datasheet - Page 17

• Manufacturer Part Number: ISL12025IBZ
• Description: IC RTC/CALENDAR EEPROM 8-SOIC
• Manufacturer: Intersil
• Type: Clock/Calendar/Supervisor/EEPROMr

Specifications of ISL12025IBZ

• Memory Size: 4K (512 x 8)
• Time Format: HH:MM:SS (12/24 hr)
• Date Format: YY-MM-DD-dd
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Bus Type: Serial (I2C)
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• Operating Temperature Classification: Industrial
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Pin Count: 8
• Mounting: Surface Mount
• Clock Format: HH
• Clock Ic Type: RTC
• Interface Type: I2C, Serial
• Memory Configuration: 512 X 8
• Supply Voltage Range: 2.7V To 5.5V
• Digital Ic Case Style: SOIC
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Device Addressing
Following a start condition, the master must output a Slave
Address Byte. The first 4-bits of the Slave Address Byte
specify access to either the EEPROM array or to the CCR.
Slave bits ‘1010’ access the EEPROM array. Slave bits
‘1101’ access the CCR.
ARRAY
CCR
FROM TRANSMITTER
FROM RECEIVER
DATA OUTPUT
DATA OUTPUT
SCL FROM
FIGURE 19. SLAVE ADDRESS, WORD ADDRESS, AND DATA BYTES (64 BYTE PAGES)
MASTER
A7
1
1
D7
0
SDA
SCL
DEVICE IDENTIFIER
17
A6
0
1
D6
0
FIGURE 18. ACKNOWLEDGE RESPONSE FROM RECEIVER
START
A5
D5
FIGURE 17. VALID START AND STOP CONDITIONS
1
0
0
A4
D4
0
1
0
START
1
A3
D3
1
0
ISL12025
A2
D2
1
0
When shipped from the factory, EEPROM array is
UNDEFINED, and should be programmed by the customer
to a known state.
Bit 3 through Bit 1 of the slave byte specify the device select
bits. These are set to ‘111’.
The last bit of the Slave Address Byte defines the operation
to be performed. When this R/W bit is a one, then a read
A1
D1
1
0
R/W
A8
A0
D0
8
STOP
ACKNOWLEDGE
SLAVE ADDRESS BYTE
WORD ADDRESS 1
WORD ADDRESS 0
DATA BYTE
9
BYTE 0
BYTE 3
BYTE 1
BYTE 2
August 13, 2008
FN6371.3