CAT34WC02

3

Doc No. 1003, Rev. A

A.C. CHARACTERISTICS

Read & Write Cycle Limits

Symbol

Parameter

1.8V, 2.5V

4.5V-5.5V

Min.

Max.

Min.

Max.

Units

Clock Frequency

100

400

kHz

Noise Suppression Time

200

200

ns

Constant at SCL, SDA Inputs

SCL Low to SDA Data Out

3.5

1

µs

and ACK Out

Time the Bus Must be Free Before

4.7

1.2

µs

a New Transmission Can Start

Start Condition Hold Time

4

0.6

µs

Clock Low Period

4.7

1.2

µs

Clock High Period

4

0.6

µs

Start Condition Setup Time

4.7

0.6

µs

(for a Repeated Start Condition)

Data In Hold Time

0

0

ns

Data In Setup Time

50

50

ns

SDA and SCL Rise Time

1

0.3

µs

SDA and SCL Fall Time

300

300

ns

Stop Condition Setup Time

4

0.6

µs

Data Out Hold Time

100

100

ns

Note:

(1) This parameter is tested initially and after a design or process change that affects the parameter.

Write Cycle Limits

Symbol

Parameter

Min.

Typ.

Max

Units

Write Cycle Time

4

10

ms

Symbol

Parameter

Max.

Units

Power-up to Read Operation

1

ms

Power-up to Write Operation

1

ms

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

address.