U3549, U3550BM, U3550BMAFL Selling Leads, Datasheet
MFG:PHILIPS Package Cooled:QFP D/C:07+
U3549, U3550BM, U3550BMAFL Datasheet download
Part Number: U3549
MFG: PHILIPS
Package Cooled: QFP
D/C: 07+
U3549, U3550BM, U3550BMAFL
- Table of contents:
Info of U3549
Info of U3550BM
Info of U3550BMAFL
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About U3500BM-BFL
PDF/DataSheet Download
Datasheet: U3500BM-BFL
File Size: 236285 KB
Manufacturer: TEMIC Semiconductors
Download : Click here to Download
About U3550BM
PDF/DataSheet Download
Datasheet: U3550BM
File Size: 220495 KB
Manufacturer: TEMIC [TEMIC Semiconductors]
Download : Click here to Download
About U3500BM-BFL
PDF/DataSheet Download
Datasheet: U3500BM-BFL
File Size: 236285 KB
Manufacturer: TEMIC Semiconductors
Download : Click here to Download
U3550BM General Description
The U3550BM is a radio-frequency IC for analogcordless telephone applications in the 26/50-MHz band (CTO standard). The IC performs full duplex communication. The transmitting and receiving frequency depends on whether the IC is used in the handset or in the base station.
The U3550BM's frequency converter consists of an FM transmitter with switchable output power and receiver Mixer 1 in the same unit. A two-wire bus interface can be used for frequency control as well as for switching the transmitter's power amplifier and the receiver. Finefrequency adjustment of the reference crystal oscillator isprogrammable.
The receive part is designed for a double-conversion architecture. The incoming radio-frequency signal will be filtered and amplified before reaching the first mixer. At this stage, the RF signal will be converted down to the first intermediate frequency (10.7 MHz) by using a local adjustable oscillator (VCO3). The frequency of this oscillator is controlled by the PLL.
The transmitter part contains two PLL-controlled VCOs. The frequency modulation is accomplished bysuperposing the incoming audio signal on the first PLLcontrol voltage. In this system, the frequency is a productof mixing VCO1 with local oscillator (VCO3). The FMmodulated carrier is amplified by external power amplifier before entering the output filter and the antenna connector.
U3550BM Maximum Ratings
| Parameters |
Symbol |
Min. |
Max. |
Unit |
| Supply voltage |
VS |
5.5 |
V | |
| Junction temperature |
Tj |
+125 |
||
| Ambient temperature |
Tamb |
-25 |
+75 |
|
| Storage temperature |
Tstg |
-50 |
+125 |
|
| Power dissipation Tamb=60 SO28 |
Ptot |
520 |
mW |
U3550BM Features
· All PLLs and most of the oscillators are integrated
· All functions and channel selection controllable by serial bus
· Receiver Mixer 1 with integrated image rejection
· Up to 25 channels selectable depending on CT0 standard
· Integrated oscillator circuit with external crystal (11.15 MHz)
· Programmable carrier-modulation frequency
U3550BM Typical Application
· CT0 (USA, France, Spain, Netherlands, Portugal, Korea, Taiwan, New Zealand, China)
· Narrowband voice and data transmitting / receiving systems
U3550BM Connection Diagram
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