Inside

• Optoislated feedback amplifier with 1.24 V precision voltage reference
• EVM available for TLC320AD50 DSP analog interface
• 300 DPI linear sensor array with hold
• Precision Hi-Speed Light-to-Voltage Converters
• Low-power rail-to-rail op amps in SOT-23
• High output drive rail-to-rail op amp consumes only 50 µA per channel
• New CD-based "Designer's Guide and Data Book" allows for powerful searches
• 2.5 V Power management for DSP systems
• EVM available for TLC320AD75C ADA converter
• Programmable gain select is added to TI's combo family
• Single chip interface solution for the 9-pin GeoPort™ host
• 400 Mbps, high-speed data transmission
• PCI1220/1250A: Industry-leading CardBus soltions for tomorrow's applications
• Universal Serial Bus (USB) hub solutions

Programmable gain select is added to TI’s combo family

Product Features

• Programmable Gain Select
• Differential Output (C14A)
• Pin selectable master clock rate (C14A)
• Power Down Mode
• Pin selectable µ-Law/A-Law companding (C14A)
• Characterized for operation from -- 40°C to 85°C

The newest members of TI’s PCM combo family, the TCM37C13A, TCM37C14A and the TCM37C15A, represent high-performance solutions for next-generation line-card and other voice-band applications. PCM combos are highly integrated voiceband pulse code modulated codecs with on chip filters. These devices provide a complete high-performance, low-noise solution to interface a full-duplex voice telephone circuit with a time-division-multiplexed (TDM) system.

These new devices offer reduced component counts with their simple, on-chip programmable gain select. This feature enables real-time gain selection without the expense and extra component count of a fully programmable gain system.

Although the most common application for combo devices is central office line card designs, these highly versatile Combos can be used in many application areas, including:

• Line interface for digital transmission and switching of T1 carrier
• PABX and central office telephone systems
• Subscriber line concentrators
• Digital encryption systems
• Digital voice-band data-storage systems
• PBX digital feature phones
• Digital signal processing

These devices are based on the proven core of the TCM29CXX family of combos and meet CCITT/(D3/D4) channel bank specifications. Both the C13A and C15A operate at 2.048 MHz and offer companding (µ-Law on the C13A, A-Law on the C15A). The TCM37C14A offers several additional features including a pin-selectable master clock rate (1.536, 1.544, and 2.048 MHz) for compatibility with many standard telecom backplane speeds and pin-selectable µ-Law/A-Law companding for use with either industry standard. The C14A also provides a differential output providing noise rejection and the capability of directly driving a transformer load.

The TCM37C14A is available in 24-pin small outline (DW) package and the TCM37C15A is available in the 20-pin DIP (N) and small outline (DW) packages. The TCM37C13A is sampling currently and will be released in the 20-pin DIP (N) and small outline (PW) packages.

• TCM37C14AIDW
• TCM37C15AIDW
• TCM37C15AIN