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What is SA58646BD?

This electronic component, produced by the manufacturer "NXP Semiconductors", performs the same function as "UHF 900MHz transceiver IC".


SA58646BD Datasheet PDF - NXP Semiconductors

Part Number SA58646BD
Description UHF 900MHz transceiver IC
Manufacturers NXP Semiconductors 
Logo NXP Semiconductors Logo 


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SA58646
UHF 900 MHz transceiver IC
Rev. 01 — 8 February 2007
Product data sheet
1. General description
The SA58646 is a BiCMOS integrated circuit that performs all functions from the antenna
to the microcontroller for reception and transmission for both the base station and the
handset in a 902 MHz to 928 MHz full-duplex radio. The SA58646 may be used in a UHF
push-to-talk walkie-talkie or in a UHF to 900 MHz data transceiver. The SA58646 is a
pin-compatible derivative of the UAA3515 with advanced features.
This IC integrates most of the functions required for a half-duplex or full-duplex radio in a
single integrated circuit. Additionally, the programmability implemented reduces
significantly external components count, board space requirements and external
adjustments.
2. Features
I RF RX (single frequency conversion FM receiver):
N Integrated LNA
N Image reject mixer
N FM detector at 10.7 MHz including an IF limiter, a wide band PLL demodulator, an
output amplifier and a RSSI output
N Carrier detection with programmable threshold
N Programmable data amplifier (slicer) phase
I Synthesizer:
N Crystal reference oscillator with integrated tuning capacitor
N Reference frequency divider
N Narrow band RX PLL including RX VCO with integrated varicaps
N Narrow band TX PLL including TX VCO with integrated varicaps
N VCO external inductors can be done with printed transmission lines on the PCB
which offers substantial savings
N Programmable clock divider with output buffer to drive a microcontroller
I Baseband RX section:
N Programmable RX gain (enable phone volume control)
N Expander with output noise level control
N Earpiece amplifier with volume control feature
N Data amplifier
I Baseband TX section:
N Microphone amplifier
N Compressor with automatic level control and hard limiter
N Programmable TX gain

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SA58646BD equivalent
NXP Semiconductors
SA58646
UHF 900 MHz transceiver IC
SA58646_1
Product data sheet
Table 2. Pin description …continued
Symbol
Pin Description
VCC(PS)
TXPD
12 prescaler supply
13 TX phase detector output
TXLF
14 TX loop filter output
GND(PA)
15 PA ground
PAO 16 PA output
GND(PA)
17 PA ground
MODI
18 summator amplifier input
MODO
19 summator amplifier output
GNDVTX
20 VCO TX ground
VTX 21 VCO TX voltage output
TXLOX
22 VCO TX coil connection x
TXLOY
23 VCO TX coil connection y
VCC(ATX)
CCAP
24 audio TX supply
25 external capacitor connection for compressor
TXO
26 audio TX output
MICI
27 microphone amplifier input
MICO
28 microphone amplifier output
CMPI
29 compressor input
VB 30 voltage reference capacitor connection
GND(ATX)
31
audio TX ground
XTALI
32 crystal input
XTALO
33 crystal output
CDLBD
34 carrier detector or low battery detector output (out-of-lock synthesizer
RX and/or TX in Test mode)
CLKO
35 clock output
EN 36 serial interface enable input
CLK 37 serial interface clock input
DATA
38 serial interface data input
DATAO
39 data amplifier output
DATAI
40 data amplifier input
GND(ARX)
41
audio RX ground
EARO
42 earpiece amplifier output
EARI
43 earpiece amplifier input
VCC(ARX)
ECAP
44 audio RX supply
45 external capacitor connection for expander
RXAI
46 audio RX input
LPFD
47 demodulator loop filter
DETO
48 inverting demodulator amplifier output
PLLO
49 demodulator amplifier negative input
LIMI 50 limiter input
GND(IF)
51 IF ground
Rev. 01 — 8 February 2007
© NXP B.V. 2007. All rights reserved.
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Part NumberDescriptionMFRS
SA58646BDThe function is UHF 900MHz transceiver IC. NXP SemiconductorsNXP Semiconductors

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