T2801 datasheet(20/27 Pages) ATMEL

20 / 27 page

T2801

Rev. A9, 11-Dec-01

Preliminary Information

20 (27)

3-Wire Bus Protocol Timing Diagram

DATA

CLOCK

ENABLE

TEC

TPER

16525

Figure 4.

Description

Symbol

Min. Value

Unit

Clock period

TPER

125

Set time data to clock

Hold time data to clock

Clock pulse width

Set time enable to clock

200

Hold time enable to data

TEC

Time between two protocols

250

TX DATA Timing

RefCLK

TX_DATA

Set-up time TX DATA

10 ns

Hold time TX DATA

10 ns

Figure 5. TX DATA timing

TS and TH must be considered for both (falling and

rising) edges of RefCLK when using REF_CLK =

10.368 MHz.

Absolute Maximum Ratings

All voltages refer to GND

Parameter

Symbol

Min.

Max.

Unit

Supply voltage regulator

Pin 10

VS_REG

3.2

4.7

Supply voltage

Pins 7, 12, 14, 33 and 42

3.0

4.7

Logic input voltage

Pins 1, 2, 3, 38, 39, 44,

45, 46, 47 and 48

VIN

– 0.3

Junction temperature

Tjmax

150

Storage temperature

Tstg

–40

150

Thermal Resistance

Parameter

Symbol

Value

Unit

Junction ambient

RthJA

t.b.d.

K/W

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