Turbo IC, Inc.
24C08
CMOS I虜C 2-WIRE BUS
8K ELECTRICALLY ERASABLE PROGRAMMABLE ROM
1K X 8 BIT EEPROM
FEATURES :
鈥?Extended Power Supply Voltage
Single Vcc for Read and Programming
(Vcc = 2.7 V to 5.5 V)
鈥?Low Power (Isb = 2碌a @ 5.5 V)
鈥?I虜C Bus, 2-Wire Serial Interface
鈥?Support Byte Write and Page Write (16 Bytes)
鈥?Automatic Page write Operation (maximum 10 ms)
Internal Control Timer
Internal Data Latches for 16 Bytes
鈥?High Reliability CMOS Technology with EEPROM Cell
Endurance : 1,000,000 Cycles
Data Retention : 100 Y
ears
DESCRIPTION:
The Turbo IC 24C08 is a serial 8K EEPROM fabricated with
Turbo鈥檚 proprietary, high reliability, high performance CMOS
technology. It鈥檚 8K of memory is organized as 1,024 x 8 bits.
The memory is configured as 64 pages with each page con-
taining 16 bytes. This device offers significant advantages
in low power and low voltage applications.
The Turbo IC 24C08 uses the I虜C addressing protocol and
2-wire serial interface which includes a bidirectional serial
data bus synchronized by a clock. It offers a flexible byte
write and a faster 16-byte page write.
The Turbo IC 24C08 is assembled in either a 8-pin PDIP or
8-pin SOIC package. Pin #1, #2 and #7 are not connected
(NC). Pin #3 is the A2 device address input for the 24C08,
such that a total of two 24C08 devices can be connected on
a single bus. Pin #4 is the ground (Vss). Pin #5 is the serial
data (SDA) pin used for bidirectional transfer of data. Pin #6
is the serial clock (SCL) input pin. Pin #8 is the power sup-
ply (Vcc) pin.
PIN DESCRIPTION
All data is serially transmitted in bytes (8 bits) on the SDA
bus. To access the Turbo IC 24C08 (slave) for a read or
write operation, the controller (master) issues a start condi-
VCC
tion by pulling SDA from high to low while SCL is high. The
master then issues the device address byte which consists
NC
of 1010 (A2) (B9) (B8) (R/W). The most significant bits (1010)
SCL
are a device type code signifying an EEPROM device. A2 is
SDA
the device address select bit which has to match the A2 pin
input on the 24C08 device. The B[9:8] bits are the 2 most
significant bits of the memory address. The read/write bit
determines whether to do a read or write operation. After
each byte is transmitted, the receiver has to provide an ac-
knowledge by pulling the SDA bus low on the ninth clock
cycle. The acknowledge is a handshake signal to the trans-
mitter indicating a successful data transmission.
NC
NC
A2
GND
1
2
3
4
8
7
6
5
VCC
NC
SCL
SDA
NC
NC
A2
GND
1
2
3
4
8
7
6
5
8 pin SOIC
8 pin PDIP
PIN DESCRIPTION
DEVICE ADDRESS (A2)
A2 is a device address input that enables a total
of two 24C08 devices to connect on a single bus.
When the address input pin is left unconnected,
it is interpreted as zero.
SERIAL DATA (SDA)
SDA is a bidirectional pin used to transfer data
in and out of the Turbo IC 24C08. The pin is an
open-drain output. A pullup resistor must be con-
nected from SDA to Vcc.
SERIAL CLOCK (SCL)
The SCL input synchronizes the data on the SDA
bus. It is used in conjunction with SDA to define
the start and stop conditions. It is also used in
conjunction with SDA to transfer data to and from
the Turbo IC 24C08.
1
1
2
3
4
5
6
7
8
