SM9403BM

NIPPON PRECISION CIRCUITS—10

Serial Interface Characteristics (SCLK, SDATA, SENB)

P arameter

Symbol

Condition

Rating

Unit

min

typ

m a x

SCLK pulse cycle

100

–

–

ns

SCLK HIGH-level pulsewidth

40

–

–

ns

SCLK LOW -level pulsewidth

40

–

–

ns

SENB setup time

20

–

–

ns

SENB hold time

40

–

–

ns

S D ATA setup time

15

–

–

ns

S D ATA hold time

15

–

–

ns

1. A CK is the ack n owledge output (n-channel open-drain). L OW -level output when the data received is valid.

S D ATA load capacitance is 15pF.

0–

2 0

ns

––

5 0

ns

SENB inter val

100

–

–

ns

SENB

SCLOCK

SDATA

Controller

SDATA

Port

tsSEN twhSCK twlCLK

tcySCK

tsSDA thSDA

tsACK

thACK

tinSEN

thSEN

bit 0

bit 1

bit 15

LSB

MSB

ACK

High Impedance