CAT24WC129_04 Datasheet, PDF (3/9 Pages) Catalyst Semiconductor – 128K-Bit I2C Serial CMOS EEPROM

CAT24WC129
A.C. CHARACTERISTICS
V_CC = +1.8V to +6V, unless otherwise specified
Output Load is 1 TTL Gate and 100pF
Read & Write Cycle Limits
Symbol Parameter
V_CC=1.8V - 6.0V V_CC=2.5V - 6.0V V_CC=3.0V - 5.5V
Min. Max. Min. Max. Min. Max. Units
F_SCL
Clock Frequency
100
400
1000 kHz
t_AA
SCL Low to SDA Data Out
and ACK Out
0.1 3.5
t ^tBUF(1)
Time the Bus Must be Free Before 4.7
a New Transmission Can Start
r ^{tHD:STA Start Condition Hold Time}
4.0
t_LOW
Clock Low Period
4.7
a _tHIGH
Clock High Period
4.0
t_SU:STA Start Condition Setup Time
4.0
P _{(for a Repeated Start Condition)}
t_HD:DAT Data In Hold Time
0
d _tSU:DAT
t_R(1)
e _tF(1)
Data In Setup Time
SDA and SCL Rise Time
SDA and SCL Fall Time
100
1.0
300
u _{tSU:STO Stop Condition Setup Time}
4.7
t_DH
Data Out Hold Time
100
tin ^tWR
Write Cycle Time
10
0.05 0.9
1.2
0.6
1.2
0.6
0.6
0
100
0.3
300
0.6
50
10
0.05 0.55 µs
0.5
µs
0.25
µs
0.6
µs
0.4
µs
0.25
µs
0
ns
100
ns
0.3
µs
100
ns
0.25
µs
50
ns
10
ms
Power-Up Timing ⁽¹⁾⁽²⁾
Symbol
Parameter
Max.
Units
n _tPUR
Power-Up to Read Operation
1
ms
o _tPUW
Power-Up to Write Operation
1
ms
Note:
c _{(1) This parameter is tested initially and after a design or process change that affects the parameter.}
(2) t_PUR and t_PUW are the delays required from the time V_CC is stable until the specified operation can be initiated.
is ^{The write cycle time is the time from a valid stop condition of a write sequence to the end of the internal program/erase cycle. During}
the write cycle, the bus interface circuits are disabled, SDA is allowed to remain high, and the device does not respond to its slave
D^address.
FUNCTIONAL DESCRIPTION
The CAT24WC129 supports the I²C Bus data transmis-
sion protocol. This Inter-Integrated Circuit Bus protocol
defines any device that sends data to the bus to be a
transmitter and any device receiving data to be a re-
ceiver. The transfer is controlled by the Master device
which generates the serial clock and all START and
STOP conditions for bus access. The CAT24WC129
operates as a Slave device. Both the Master device and
Slave device can operate as either transmitter or re-
ceiver, but the Master device controls which mode is
activated.
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Doc. No. 1079, Rev. V