MCP8021 datasheet(11/66 Pages) MICROCHIP

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DS20006265D-page 11

MCP8021/2

Analog Interface

Analog Low-Voltage Input

ANALOGVIN

—

5.5

Excludes high-voltage pins

(Note 1)

Analog Low-Voltage Output

ANALOGVOUT

0—

VREG

Excludes high-voltage pins

(Note 1)

WAKE Input

Input Voltage

WAKEI/O

0—

VDD

Input Rising Threshold

VWAKE_HI_TH

—

1.26

(Note 1)

Input Falling Threshold

VWAKE_LO_TH

0.54

—

Input Current

IWAKE

—0.2

—

µA

VWAKE =0.0V (Note 1)

—70

—

VWAKE =3.3V (Note 1)

—106

—

VWAKE =5.0V (Note 1)

—596

—

VWAKE =28V (Note 1)

Input Pull-Down Resistance

RWAKE_PULLDN

—51

—



Wake-Up Signal Setup Time

tWAIT_SETUP

150

—

µs

Minimum time WAKE pin must

be logic low before rising edge

of wake-up pulse

DE2 Communications

Baud Rate

BAUD

9030

9600

10170

bps

Half-duplex

Power-Up Delay

PU_DELAY

—

Time from rising VDD  6V to

DE2 starts sending POR

message, CVREG = 1 µF

(Note 1)

DE2 Sink Current

IDE2_SINK

1—

—

VDE2  50 mV (Note 1)

DE2 Message Response Time

tDE2_RSP

—

Time from last received Stop

bit to response Start bit

DE2 Host Wait Time

tDE2_WAIT

2.8

—

Minimum time for host to wait

for response; three packets

based on 9600 Baud

DE2 Message Receive

Time-out

DE2RCVTOUT

—

1.45

Time after Start bit received to

NACK for no Stop bit

Auto-Baud Detection Window

(Break)

ABAUDDET

1.29

—

2.00

Window for valid detection of

continuous logic low on DE2

link

Auto-Baud Response Delay

ABAUDDLY

—1.00

—

Delay from ABUADDET to start

of sending 0x55 byte

Auto-Baud Complete Delay

ABAUDCOMP

—

2.00

—

Delay after sending 0x55 byte

before exiting auto-baud

function

Delay Between Bytes of

Multibyte Message from Host

tDE2_HOST_

MULTI_DLY

—

1.3

Delay between message bytes

arriving from host

AC/DC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise noted: TJ = -40°C to +150°C; typical values are for +25°C, VDD = 13.5V,

CVBOOT = 4.7 µF, CVREG =4.7 µF, CCP = 220 nF.

Parameter

Sym.

Min.

Typ.

Max.

Units

Conditions

Note 1: Limits based on design, simulation or characterization. Not production tested.

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