TDA7529_11 datasheet(27/61 Pages) STMICROELECTRONICS

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TDA7529

Electrical specifications

Doc ID 13311 Rev 4

27/61

4.15

GPIO – general purpose IO interface pins

4.16

AFSAMPLE / AFHOLD

Table 22.

GPIO - general purpose IO interface pins

name

GPIO functionality

Multiplexed

functionality details

are given in the

corresponding

chapters

GPIO-Output

GPIO-Input

High level

Low level

Functionality

Voltage

Source

current

Voltage

Sink

current

GP1

3.3V

1 mA

Analog input ADC

0 ... 3.3V

GP2

3.3V

1 mA

Analog input ADC

0 ... 3.3V FM key AGC input

GP4

3.3V

0.1 mA

10 mA

AM cascode VDS input

0 ... 3.3V

GP5

3.3V

1 mA

Digital Input

0 / 3.3V

GP6

3.3V

1 mA

Digital Input

0 / 3.3V

SPI MISO output

GP7

3.3V

1 mA

FM-AGC voltage output

GP8

3.3V

1 mA

AM-AGC voltage output

Symbol

Parameter

Test Condition

Min

Typ

Max

Units

High level output voltage

@ 100k

Ω load to GND

VDD-0.3

Low level output voltage

@ 100k

Ω load to VDD

0.3

High level source current

GP1 / GP2 / GP5 / GP6:

@ 1k

Ω load to GND

0.5

High level source current

GP4

@ 1k

Ω load to GND

0.08

0.1

low level sink current

GP1 / GP2 / GP5 / GP6:

@ 1k

Ω load to VDD

0.8

low level sink current

GP4:

@ 100

Ω load to VDD

8.0

Input impedance

digital input mode

100

Input voltage range

GP1 / GP2

3.5

High level input voltage

GP5 / GP6 used as digital

input

2.2

3.5

Low level input voltage

GP5 / GP6 used as digital

input

-0.05

1.0

Table 23.

AFSAMPLE / AFHOLD

Symbol

Parameter

Test Condition, Comments

Min

Typ

Max

Units

Output voltage at

AFSAMPLE/AFHOLD

3.6

Maximum sink current

Vo = 0.4V

800

μA

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