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AS8221

Data Sheet - P i n A s s i g n m e n t s

4 Pin Assignments

Figure 2. Pin Assignments SSOP20 Package

4.1 Pin Descriptions

Table 1. Pin Descriptions

Pin Name

Pin Number

Pin Type

Description

INH2

1

AIO

Analog Output. Inhibit 2 output for switching external voltage regulator

INH1

2

AIO

Analog Output. Inhibit 1 output for switching external voltage regulator

EN

3

DI_PD

Digital Input. Enable input

4S

Supply Voltage. I/O supply voltage

TxD

5

DI_PD

Digital Input. Transmit data input

TxEN

6

DI_PU

Digital Input. Transmitter enable input

RxD

7

DO

Digital Output. Receive data output

BGE

8

DI_PD

Digital Input. Bus guardian enable input

STBN

9

DI_PD

Digital Input. Standby input

Reserved

10

A/DIO_PD

1

1. To be connected to GND or to be unconnected

Not used

11

RxEN

12

DO

Digital Output. Receive data enable output

ERRN

13

DO

Digital Output. Error diagnosis output and wake status output

14

S

Supply Voltage. Battery supply voltage

WAKE

15

AIO

Analog Input. Local wake-up input

GND

16

S

Ground

BM

17

AIO

Analog Input/Output. Bus line Minus

BP

18

AIO

Analog Input/Output. Bus line Plus

19

S

Supply voltage.

Not used

20

AS8221

1

2

3

4

5

6

7

8

16

20

19

18

17

INH1

EN

VIO

TxD

TxEN

RxD

BGE

STBN

VCC

BP

BM

GND

WAKE

VBAT

ERRN

RxEN

15

14

13

9

10

11

12

INH2

Reserved

n.u

n.u