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TIMING REQUIREMENTS FOR I

SCL

SDA

t

w(H)

t

w(L)

t

r

t

f

t

su1

t

h1

T0027-01

SCL

SDA

t

h2

t

(buf)

t

su2

t

su3

Start

Condition

Stop

Condition

T0028-01

TAS5414

TAS5424

SLOS514A – FEBRUARY 2007 – REVISED JULY 2007

over recommended operating conditions (unless otherwise noted)

PARAMETER

MIN

TYP

MAX

UNIT

Rise time for both SDA and SCL signals

1000

ns

Fall time for both SDA and SCL signals

300

ns

SCL pulse duration, high

4

μs

SCL pulse duration, low

4.7

μs

Setup time for START condition

4.7

μs

START condition hold time after which first clock pulse is generated

4

μs

Data setup time

250

ns

Data hold time

ns

Setup time for STOP condition

4

μs

Time between a STOP and START condition

4.7

μs

Load capacitance for each bus line

400

pF

(1)

A device must internally provide a hold time of at least 300 ns for the SDA signal to bridge the undefined region of the falling edge of

SCL.

Figure 1. SCL and SDA Timing

Figure 2. Timing for Start and Stop Conditions

11

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