Description
 Xecom’s XE2420G offers unprecedented design flexibility.
It provides a global common communications solution in the smallest available package.
The XE2420G fits a standard 68-Pin PLCC socket and can be socketed or soldered onto the board in an automated assembly process.
The XE2420G allows incorporation of a dial-up access where no other modem will fit.
The surface mount package and small size of the XE2420G are particularly impressive because it is a complete modem.
The DAA, RAM, Crystal; everything is included.
Like all Xecom modems, the XE2420G includes transferrable FCC Part 68 Registration.
No 2400 BPS modem incorporates more features than the XE2420G.
The XE2420G is one of the few low-speed modems available with built-in error correction .
The XE2420G incorporates both a sleep mode and power down mode making it ideal for battery powered applications.
The XE2420G also incorporates Handset Interrupt to prevent conflicts in shared line applications.

Features
* Small Size: The HyPLCC™ measures less than 1 inch by 1 inch square and 0.350 inches thick
* Surface-mountable: The HyPLCC™ package is equivalent to a 68-Pin PLCC device.
* Data transfer from 300 to 2400 BPS using V.22bis, V.22, V.23, V.21, Bell 212A, and Bell 103 Protocols
* Modem Control and Configuration via industry standard AT Commands.
* Supports V.42 and MNP error correction;
* Complete integrated solid-state DAA includes, Ring Detect, Loop Current Holding Circuit, Hook Switch and Metallic Surge Protection;
* User Transferrable FCC Part 68 Registration
* Complies with telephone networks around the world.
* UL60950 Recognition
* Handset Interrupt detects parallel telephone pick -up
* Low Power operation, typically less than 100 mW, includes automatic sleep mode and power down operation

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Features
• Integrated RF transceiver and modem for Bluetooth wireless technology.
• Manufactured using low-power 0.18-micron CMOS process technology.
• Digital baseband interface connects directly to an integrated Bluetooth controller.
• Direct conversion RF architecture improves receiver-blocking performance.
• Low out-of-band spurious emissions minimize interference with mobile phone operations.
• Hardware AGC dynamically adjusts receiver performance in changing environments.
• 50 Ω RF I/O does not need additional external impedance matching components.
• On-chip voltage regulation simplifies system design.
• -88 dBm receiver sensitivity and +2 dBm transmitter power typical performance specifications.
• Bluetooth Specification V2.0 qualified. Complies with Bluetooth specifications V1.1, V1.2 and V2.0.

Applications
• Mobile phones with integrated controller for Bluetooth wireless technology.

Description
The following figure shows the SiW1721B Radio Modem functional block diagram. During the receive process, the radio signal is taken from the single-ended RF input pin that feeds into the low noise amplifier (LNA). The signal from the LNA is directly down-converted to I/Q baseband, filtered with an anti-aliasing filter, and converted to a digital signal with a high resolution analog-to-digital converter. The critical channel filtering is done in the digital domain for stable and repeatable performance. The signal is then processed by a high performance GFSK demodulator. The IC has multiple internal selfcalibration circuits to maintain stable and repeatable performance from part-to-part as well as over the full temperature range.
The IC has two fully integrated regulators: one for the radio (analog regulator) and one for the digital logic (digital regulator). The digital regulator can be used to supply a Bluetooth baseband controller. Both regulators can be bypassed if external regulation is desired.
Note: When bypassing the analog regulator, the VBATT_ANA and VCC_OUT pins must be tied together and the external analog voltage (1.8 V) should be applied to the VBATT_ANA pin. When bypassing the digital regulator, the VBATT_DIG pin should be left unconnected and the external digital voltage (1.8 V) should be applied to the VBB_OUT pin.
The IC also provides power on reset and glitch-free clock start-up. A reference PLL can be enabled to support a number of different reference frequencies.
Digital control functions and a programming interface provide radio modem control and a flexible interface to external Bluetooth link controllers.
TAG Modem, Radio

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The ML145442 and ML145443 silicon–gate CMOS single–chip low–speed modems contain a complete frequency shift keying (FSK) modulator, demodulator, and filter. These devices are compatible with CCITT V.21 (ML145442) and Bell 103 (ML145443) specifications. Both devices provide full–duplex or half–duplex 300–baud data communication over a pair of telephone lines.
They also include a carrier detect circuit for the demodulator section and a duplexer circuit for direct operation on a telephone line through a simple transformer.

This Device Offers The Following Performance Features
• ML145442 Compatible with CCITT V.21
• ML145443 Compatible with Bell 103
• Low–Band and High–Band Band–Pass Filters On–Chip
• Simplex, Half–Duplex, and Full–Duplex Operation
• Originate and Answer Mode
• Analog Loopback Configuration for Self Test
• Hybrid Network Function On–Chip
• Carrier Detect Circuit On–Chip
• Adjustable Transmit Level and CD Delay Timing
• On–Chip Crystal Oscillator (3.579 MHz)
• Single +5 V Power Supply Operation
• Internal Mid–Supply Generator
• Power–Down Mode
• Pin Compatible with MM74HC943
• Capable of Driving –9 dBm into a 600 W Load
• Operating Temperature Range = TA –40° to +85°C

ML145442RP
ML145442-6P
ML145443RP
ML145443-6P
TAG Modem

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FEATURES
* Low cost, 3.3 V CMOS MxFE® for broadband modems
* 10-bit digital-to-analog converter (DAC)
- 2×/4× interpolation filter
- 250 MSPS DAC update rate
* 10-bit, 75 MSPS ADC
* Low noise RxPGA
- Dual channel muxed input
- 6 dB input overload attenuator
−12 dB to +48 dB (without attenuator)
* Third-order programmable low-pass filter
* Flexible digital datapath interface
- Half-duplex and full-duplex operation
- Programmable delay Tx driver disable signal
* Various power-down/reduction modes
* Internal clock multiplier (PLL)
* 2 auxiliary programmable clock outputs
* 64-lead LFCSP

APPLICATIONS
Power-line networking

GENERAL DESCRIPTION
 The AD9867 is a mixed-signal front-end (MxFE) IC for transceiver applications requiring Tx and Rx path functionality with data rates up to 75 MSPS. Its flexible digital interface, power-saving modes, and high Tx-to-Rx isolation make the part well suited for half-duplex and full-duplex applications. The digital interface is extremely flexible allowing simple interfaces to digital back ends. Power-saving modes can reduce power consumption of individual functional blocks or can power down unused blocks in half-duplex applications.

 A serial port interface (SPI®) allows software programming of the various functional blocks. An on-chip PLL clock multiplier and synthesizer provide all the required internal clocks, as well as two external clocks from a single crystal or clock source.

 The Tx signal path consists of a bypassable 2×/4× low-pass interpolation filter and a 10-bit, 250 MSPS TxDAC. The transmit path signal bandwidth can be as high as 33.6 MHz at an input data rate of 75 MSPS. The TxDAC provides differential current outputs that can be steered directly to a differential or single-ended external load. Tx power can be digitally controlled over a 7.5 dB range in 0.5 dB steps.

The receive path consists of a programmable amplifier (RxPGA), a tunable low-pass filter (LPF), and a 10-bit analog-to-digital converter (ADC). The low noise RxPGA has a programmable gain range of −12 dB to +48 dB in 1 dB steps. Its input referred noise is less than 3.6 nV/√Hz for gain settings beyond 36 dB. An optional attenuator provides an additional 6 dB (or more) of attenuation (when combined with external series resistors).
 
 The receive path LPF cutoff frequency can either be set over a 22 MHz to 38 MHz range or simply bypassed. The 10-bit ADC achieves excellent dynamic performance over a 5 MSPS to 75 MSPS span. Both the RxPGA and the ADC offer scalable power consumption allowing power/performance optimization.
 The AD9867 provides a highly integrated solution for broadband modems. It is available in a space-saving, 64-lead LFCSP and is specified over the commercial (−40°C to +85°C) temperature range.
TAG Modem, SIGNAL

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FEATURES
* Integrated Monolithic Upconverter
* Compatible with all digital and analog modulation types
* 5 Volt Operation
* Low Power Consumption
* Low Noise Figure
* High Conversion Gain
* Low Distortion
* Excellent Oscillator Purity and Phase Noise
* Remote Shutdown Feature
* Small Size
* Low Cost
* High Reliability

DESCRIPTION
The ACU50752 is a Monolithic GaAs IC designed to perform the upconverter functions in a double conversion tuner: gain block, local oscillator and balanced mixer. The specifications meet the requirements of CATV, TV and Cable Modem applications. Supplied in a 16-lead SOIC
package and requiring only a single polarity 5 V supply (o  3.5 V, with slightly reducedperformance), the IC is well suited in situations where smal l size, low cost, low auxiliary parts count and a no-compromise performance is important.
It provides tuner manufacturers the opportunity to reduce cost by lowering the component count and decreasing the amount of labor-intensive production alignment steps, while significantly improving performance and reliability.

ACU50752
TAG cable, catv, Modem, TV

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