SA56004X_5

© NXP B.V. 2008. All rights reserved.

Product data sheet

Rev. 05 — 22 May 2008

23 of 36

NXP Semiconductors

SA56004X

Digital temperature sensor with overtemperature alarms

[1]

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.

[2]

Delay from SDATA STOP to SDATA START.

[3]

Delay from SDATA START to first SCLK HIGH-to-LOW transition.

[4]

Delay from SCLK HIGH-to-LOW transition to SDATA edges.

[5]

Delay from SDATA edges to SCLK LOW-to-HIGH transition.

[6]

Delay from SCLK LOW-to-HIGH transition to restart SDATA.

[7]

Delay from SCLK HIGH-to-LOW transition to SDATA STOP condition.

[8]

LOW period for reset of SMBus.

Table 19.

SMBus interface characteristics

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

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

HIGH-level input voltage

2.2

-

-

V

LOW-level input voltage

-

-

0.8

V

LOW-level output current

1.0

-

-

mA

6.0

-

-

mA

LOW-level output current

-

-

1.0

µA

LOW-level input current

−1.0

-

-

µA

HIGH-level input current

-

-

1.0

µA

input capacitance

SCLK, SDATA

-

5

-

pF

SMBus digital switching characteristics[1]

SCLK operating frequency

-

-

400

kHz

SCLK LOW time

10 % to 10 %

600

5000

-

ns

SCLK HIGH time

90 % to 90 %

600

5000

-

ns

SMBus free time[2]

600

-

-

ns

hold time of START condition[3]

10 % of SDATA to 90 % of SCLK

600

-

-

ns

hold time of data[4]

0

300

-

ns

set-up time of data in[5]

250

-

-

ns

set-up time of repeat START

condition[6]

90 % to 90 %

250

-

-

ns

set-up time of STOP condition[7] 90 % of SCLK to 90 % of SDATA

250

-

-

ns

rise time

SCLK and SDATA

-

-

1

µs

fall time

SCLK and SDATA

-

-

300

ns

output fall time

-

-

250

ns

SMBus time-out time[8]

25

-

35

ms