CAP1028 datasheet(13/71 Pages) SMSC

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8 Channel Capacitive Touch Sensor with 2 LED Drivers

Datasheet

SMSC CAP1028

Revision 1.1 (08-05-09)

DATASHEET

SMBus First

Communication

tSMB

SMBus Timing

Input Capacitance

CIN

5pF

Clock Frequency

fSMB

400

kHz

Spike Suppression

tSP

Bus free time Start to

Stop

tBUF

1.3

Setup Time: Start

tSU:STA

0.6

Setup Time: Stop

tSU:STP

0.6

Data Hold Time

tHD:DAT

0.6

Data Setup Time

tSU:DAT

0.6

Clock Low Period

tLOW

1.3

Clock High Period

tHIGH

0.6

Clock/Data Fall time

tFALL

300

Min = 20+0.1CLOAD ns

Clock/Data Rise time

tRISE

300

Min = 20+0.1CLOAD ns

Capacitive Load

CLOAD

400

per bus line

BC-Link Timing

Clock Period

tCLK

250

Data Hold Time

tHD:DAT

0ns

Data Setup Time

tSU:DAT

Data must be valid before clock

Clock Duty Cycle

Duty

SPI Timing

Clock Period

250

Clock Low Period

tLOW

0.4 x tP

0.6 x tP

Clock High Period

tHIGH

0.4 x tP

0.6 x tP

Clock Rise / Fall

time

tRISE /

tFALL

0.1 x tP

Data Output Delay

tD:CLK

Data Setup Time

tSU:DAT

Data Hold Time

tHD:DAT

Table 2.2 Electrical Specifications (continued)

VDD = 3V to 3.6V, TA = 0°C to 100°C, all Typical values at TA = 27°C unless otherwise noted.

CHARACTERISTIC

SYMBOL

MIN

TYP

MAX

UNIT

CONDITIONS

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