Philips Semiconductors

Product data sheet

SA56004X

±1 °C accurate, SMBus-compatible, 8-pin, remote/local

digital temperature sensor with over temperature alarms

2004 Oct 06

6

SMBus INTERFACE AC ELECTRICAL CHARACTERISTICS

These specifications are guaranteed by design and not tested in production.

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Logic input HIGH voltage for SCLK, SDATA

2.2

–

–

V

Logic input LOW voltage for SCLK, SDATA

–

–

0.8

V

Logic output LOW sink current

1.0

–

–

mA

6.0

–

–

mA

Logic output high leakage current

–

–

1.0

µA

Logic input currents

–1.0

–

1.0

µA

SMBus input capacitance for SCLK, SDATA

–

5

–

pF

SMBus digital switching characteristics

The switching characteristics of the SA56004X fully meet or exceed all parameters specified in SMBus version 2.0. The following parameters

specify the timing between the SCLK and SDATA signals in the SA56004X. They adhere to, but are not necessarily specified as the SMBus

specifications.

SCLK operating frequency

–

–

400

kHz

SCLK LOW time

10% to 10%

4.7

5.0

–

µs

SCLK HIGH time

90% to 90%

4.0

5.0

–

µs

SMBus free time.

Delay from SDATA stop to SDATA start

4.7

–

–

µs

Hold time of start condition.

Delay from SDATA start to first SCLK H-L

10% of SDATA to 90% of SCLK

4.0

–

–

µs

Hold time of data.

Delay from SCLK H-L to SDATA edges

–

300

–

ns

Set-up time of data in.

Delay from SDATA edges to SCLK L-H

250

–

–

ns

Set-up time of repeat start condition.

Delay from SCLK L-H to restart SDATA

90% to to 90%

250

–

–

ns

Set-up time of stop condition.

Delay from SCLK H-L to SDATA stop

90% of SCLK to 90% of SDATA

4.0

–

–

µs

Rise time of SCLK and SDATA

–

–

1

µs

Fall time of SCLK and SDATA

–

–

300

ns

Output fall time

–

–

250

ns

SMBus TIMEOUT.

Low period for reset of SMBus

25

–

35

ms

P

S

SCLK

SDATA

SL01204

SP

Figure 3. Timing measurements.