X4643/5 – Preliminary Information

Characteristics subject to change without notice.

15 of 22

REV 1.26 4/30/02

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Notes: (4) This parameter is periodically sampled and not 100% tested.

Symbol

Parameter

Max.

Unit

Test Conditions

(4)

Output Capacitance (SDA, RST/RST)

8

pF

(4)

Input Capacitance (SCL, WP)

6

pF

EQUIVALENT A.C. LOAD CIRCUIT

A.C. TEST CONDITIONS

SDA

or

RESET

1533

Ω

100pF

5V

Input pulse levels

Input rise and fall times

10ns

Input and output timing levels

Output load

Standard output load

A.C. CHARACTERISTICS (Over recommended operating conditions, unless otherwise specified)

(2) Cb = total capacitance of one bus line in pF.

Symbol

Parameter

Min.

Max.

Unit

SCL Clock Frequency

0

400

kHz

Pulse width Suppression Time at inputs

50

ns

SCL LOW to SDA Data Out Valid

0.1

0.9

µs

Time the bus free before start of new transmission

1.3

µs

Clock LOW Time

1.3

µs

Clock HIGH Time

0.6

µs

Start Condition Setup Time

0.6

µs

Start Condition Hold Time

0.6

µs

Data In Setup Time

100

ns

Data In Hold Time

0

µs

Stop Condition Setup Time

0.6

µs

Data Output Hold Time

50

ns

SDA and SCL Rise Time

20 + .1Cb

300

ns

SDA and SCL Fall Time

20 + .1Cb

300

ns

WP Setup Time

0.6

µs

WP Hold Time

0

µs

Cb

Capacitive load for each bus line

400

pF