73M2901/5V Advanced Single Chip Modem

RESET

A reset is accomplished by holding the RESET pin high. To ensure a proper power-on reset, the reset pin must be held high for a minimum of 3μs. At power on, the voltage at VPD, VPA, and RESET must come up at the same time for a proper reset.

ASYNCHRONOUS AND SYNCHRONOUS SERIAL DATA INTERFACE

The serial data interface consists of the TXD and RXD data paths (LSBit shifted in and out first, respectively); and the TXCLK and RXCLK serial clock outputs associated with the data pins; CTS/RTS flow control; DCR, DSR and DTR. In synchronous mode, the data is passed at the bit rate (tolerance is +1%, -2.5%).

PIN DESCRIPTIONS

POWER PIN DESCRIPTION

PIN NAME

32-PIN

44-PIN

TYPE

DESCRIPTION

 

 

 

 

 

VPA

15

16

I

Positive analog voltage (+ Analog Supply)

 

 

 

 

 

VNA

21

22

I

Negative analog voltage. (Analog Ground)

 

 

 

 

 

VPD

6, 25,

2,12,

I

Positive digital voltage (+ Digital Supply)

 

29

27, 33

 

 

 

 

 

 

 

VND

5, 22,

11, 24,

I

Negative digital voltage. (Digital Ground)

 

26

44, 28

 

 

 

 

 

 

 

ANALOG INTERFACE PIN DESCRIPTION

 

 

 

 

 

 

PIN NAME

32-PIN

44-PIN

TYPE

DESCRIPTION

 

 

 

 

 

RXA

20

21

I

Receive analog data

 

 

 

 

 

TXAN

16

17

O

Transmit Analog -

 

 

 

 

 

TXAP

17

18

O

Transmit Analog +

 

 

 

 

 

HBDEN

14

15

I

2w/4w hybrid driver enable pin

 

 

 

 

0 = Driver configured for 50kΩ or greater load (Tie to VND)

 

 

 

 

1 = Driver configured for driving line-coupling transformer (Tie to

 

 

 

 

VPD)

 

 

 

 

 

VBG

19

20

O

Analog Band Gap voltage reference pin (0.1μF to VNA)

 

 

 

 

 

VREF

18

19

O

Analog reference voltage pin (0.1μF to VNA)

 

 

 

 

 

EXTERNAL INTERRUPTS PIN DESCRIPTIONS

 

 

 

 

 

PIN NAME

32-PIN

44-PIN

TYPE

DESCRIPTION

 

 

 

 

 

RING

2

39

I

External interrupt – Line interface ring detection circuitry input

ASRCH

1

38

I

External interrupt – Autobaud detection, connected to TXD

DTR

32

37

I

External interrupt – DTE DTR signal input

 

 

 

 

 

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TDK 73M2901/5V manual PIN Descriptions

73M2901/5V specifications

The TDK 73M2901/5V is a compact and versatile power management IC designed for a wide array of applications, particularly in portable electronic devices. This chip is part of TDK's extensive lineup of power management solutions, showcasing advanced technologies and features that cater to the evolving needs of modern electronics.

One of the standout characteristics of the TDK 73M2901/5V is its ability to support a broad input voltage range. This flexibility allows the device to operate efficiently with various power supply configurations, making it suitable for battery-operated devices, USB-powered systems, and more. Its robust design ensures that it can maintain stable performance even under fluctuating voltage conditions, a critical attribute for portable applications.

The 73M2901/5V integrates several key power management features, including voltage regulation, power distribution, and battery management functionalities. The integrated voltage regulator provides precise output voltage control, helping to preserve battery life by managing power consumption effectively. This feature is particularly essential for devices that rely on rechargeable batteries, as it enhances overall efficiency and prolongs usage times between charges.

In addition to voltage regulation, the TDK 73M2901/5V boasts advanced power distribution capabilities. The chip can intelligently manage power routing among multiple components within a device, ensuring optimal performance without unnecessary power loss. This is crucial for devices that incorporate various subsystems, needing coordinated power management to function seamlessly.

Furthermore, the 73M2901/5V includes built-in battery management capabilities that facilitate safe charging and discharging processes. This feature not only guards against overcharging and overheating but also extends the lifespan of lithium-ion and lithium-polymer batteries commonly found in consumer devices.

From a technological standpoint, the TDK 73M2901/5V utilizes cutting-edge semiconductor processes that enhance its efficiency and thermal performance. This results in reduced heat generation, allowing for compact designs without the risk of overheating. The chip is also designed for low quiescent current, which minimizes power draw during standby or idle states, further enhancing energy efficiency.

Overall, the TDK 73M2901/5V is a highly capable power management IC that combines robustness, efficiency, and advanced features. Its adaptability to various power configurations, integrated management capabilities, and modern semiconductor technologies make it an ideal choice for developers seeking reliable solutions for their portable electronic designs. As technology continues to advance, solutions like the TDK 73M2901/5V will play an increasingly vital role in powering the next generation of electronic devices.