Pin Functions

PIN

Type 1

DESCRIPTION

NAME

NO.

AD1

B4

I

I2C address pin LSB.

AD2

B5

I

I2C address pin LSB+1.

BGND

D1

P

Boost ground. Connect to PCB GND plane strongly with multiple vias.

D2

D3

DREG

A6

P

Digital core voltage regulator output. Bypass to GND with a capacitor. Do not connect to

external load.

FSYNC

A2

I

I2S word clock or TDM frame sync.

GREG

F4

P

High-side gate CP regulator output. Do not connect to external load.

GND

A3

P

Digital ground. Connect to PCB GND plane. Strong connection to ground plane required

through multiple vias.

C2

C5

IOVDD

A4

P

1.2V or 1.8V Digital IO supply. Decouple to GND with capacitor.

IRQZ

B3

O

Open drain, active low interrupt pin. Pull up to IOVDD with resistor if optional internal

pullup is not used.

OUT_N

F5

O

Class-D negative output.

OUT_P

F6

O

Class-D positive output.

PGND

D4

P

Class-D Power stage ground. Connect to PCB GND plane strongly through multiple vias.

D5

D6

E4

PVDD

F1

P

Integrated boost output and Class-D power stage supply.

F2

F3

SBCLK

A1

I

I2S/TDM serial bit clock.

SCL

B6

I

I²C Clock Pin. Pull up to IOVDD with a resistor.

SDA

A5

I/O

I²C Data Pin. Pull up to IOVDD with a resistor.

SDIN

B2

I

I2S or TDM serial data input.

SDOUT

B1

I/O

I2S or TDM serial data output.

SDZ

C3

I

Active low hardware shutdown.

SW

E1

P

Boost converter switch input.

E2

E3

VBAT

C1

P

Battery power supply input. Connect to 2.5V to 5.5V supply and decouple with a capacitor.

VBAT_SNS

C4

I

Battery sense terminal. Connect to 1S or 2S battery supply for remote battery sensing.

Ground the pin if remote sensing is not used.

VDD

C6

P

Analog, digital power supply. Connect to 1.8V supply and decouple to GND with capacitor.

VSNS_N

E5

I

Voltage sense negative input. Connect to speaker negative terminal as close to speaker as

possible. Add series resistor if EMI filter is used.

VSNS_P

E6

I

Voltage sense positive input. Connect to speaker positive terminal as close to speaker as

possible. Add series resistor if EMI filter is used.

1. I = Input, O = Output, I/O = Input or Output, G = Ground, P = Power.

5 Revision History

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

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TAS2574

SLASF74 – AUGUST 2024

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