Pinout

RDA1846 PDF Datasheet – Transceiver for Walkie Talkie

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A transceiver for a walkie-talkie is a compact electronic device that combines both the functions of a transmitter and a receiver within a single unit. This allows users to communicate with each other using a two-way radio system. Walkie-talkie transceivers are commonly used for short-range wireless communication in various scenarios, including personal, professional, and recreational activities.

Part Number: RDA1846

Function: Single-chip Transceiver

Package: QFN 32 Pin Type

Manufacturer: RDA

Images:RDA1846 pinout datasheet

Description

The RDA1846 is a highly integrated single-chip transceiver for Walkie Talkie applications. It totally realizes the translation from RF carrier to voice in the RX path and from voice to RF carrier in the TX path, requiring only one micro controller. The RDA1846 has a powerful digital signal processor, which makes it have optimum voice quality, flexible function options, and robust performance under varying reception conditions.

The RDA1846 can be tuned to the worldwide frequency band for Walkie Talkie from 400MHz to 500MHz and especially from 134MHz to 174MHz which meets the frequency band of weather broadcast. The transceiver uses the CMOS process with a package size of 5X5mm. By virtue of its high integration, it requires the least external components and eliminates the complicated design of sensitive RF circuits on PCB.

Features

1. CMOS single-chip fully-integrated transceiver

2. Fully integrated frequency synthesizer and VCO

3. 12.5KHz, 25KHz channels

4. Digital auto frequency control (AFC)

5. Digital auto gain control (AGC)

6. Selectable pre/de-emphasis

7. Received signal strength indicator (RSSI)

8. DTMF and programmable in-band dual tone

9. Programmable in-band single tone transmitter

10. Auto RX/TX/SLEEP state switching

11. 3-wire/4-wire/I2C serial control bus interface

12. Analog and digital volume control

13 Directly support 32Ω resistance loading

14. 3.3 to 4.8 V supply voltage with Integrated LDO

Block Diagram:

RDA1846 transceiver

Applications:

1. Cellular handsets

2. Family radio services

3. Walkie Talkies

RDA1846 PDF Datasheet

KID65003AP PDF – Darlington Transistor Array

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This post explains for the Transistor Array.

The Part Number is KID65003AP, KID65003AF.

The function of this semiconductor is 7 CIRCUIT DARLINGTON TRANSISTOR ARRAY.

The package is DIP 16 Pin Type

Manufacturer: KEC(Korea Electronics)

Preview images :
KID65003AP pdf

 

Description

A Darlington transistor array is a specialized integrated circuit (IC) that consists of multiple Darlington transistor pairs on a single chip.

The KID65003AP is high-voltage, high-current darlington transistor array comprised of seven NPN darlington pairs. All units feature internal clamp diodes for switching inductive loads.

A Darlington transistor array is a specialized integrated circuit (IC) that consists of multiple Darlington transistor pairs on a single chip. It combines the advantages of Darlington transistor configuration, which offers high current gain, with the convenience of integrated circuit technology.

1. Darlington Transistor Configuration: The Darlington transistor array incorporates multiple Darlington transistor pairs. A Darlington pair is a combination of two bipolar junction transistors (BJTs) connected together to provide a high current gain.

2. High Current Gain: The Darlington configuration provides a very high current gain compared to a single transistor. The current gain is the ratio of output current to input current, and the Darlington configuration allows for significant amplification of input current.

3. Integrated Circuit Package: The Darlington transistor array is packaged as an integrated circuit, typically in a standard IC package such as a DIP (Dual In-line Package) or surface-mount technology (SMT) package. This allows for easy integration and soldering onto a printed circuit board (PCB).

4. Multiple Transistor Pairs: The array includes multiple Darlington transistor pairs, often with a common emitter or common collector configuration. This allows for multiple inputs and outputs, providing flexibility in designing various electronic circuits.

 

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KID65003AP pinout datasheet

KID65003AP Datasheet