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TLK2201BRCPR Datasheet(PDF) 2 Page - Texas Instruments |
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TLK2201BRCPR Datasheet(HTML) 2 Page - Texas Instruments |
2 / 24 page www.ti.com DESCRIPTION (CONTINUED) Differences Between TLK2201B, TLK2201BI, and TNETE2201 TLK2201B TLK2201BI SLLS585C – NOVEMBER 2003 – REVISED FEBRUARY 2008 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. The primary application of these devices is to provide building blocks for point-to-point baseband data transmission over controlled impedance media of 50 Ω or 75 Ω. The transmission media can be printed-circuit board traces, copper cables or fiber-optical media. The ultimate rate and distance of data transfer is dependent upon the attenuation characteristics of the media and the noise coupling to the environment. The TLK2201B and TLK2201BI perform the data serialization, deserialization, and clock extraction functions for a physical layer interface device. The transceiver operates at 1.25 Gbps (typical), providing up to 1 Gbps of data bandwidth over a copper or optical media interface. The TLK2201B and TLK2201BI support both the defined 10-bit interface (TBI) and a reduced 5-bit interface utilizing double data rate (DDR) clocking. In the TBI mode the serializer/deserializer (SERDES) accepts 10-bit wide 8b/10b parallel encoded data bytes. The parallel data bytes are serialized and transmitted differentially at PECL compatible voltage levels. The SERDES extracts clock information from the input serial stream and deserializes the data, outputting a parallel 10-bit data byte. In the DDR mode the parallel interface accepts 5-bit wide 8b/10b encoded data aligned to both the rising and falling edge of the reference clock. The data is clocked most significant bit first, (bits 0–4 of the 8b/10b encoded data) on the rising edge of the clock and the least significant bits (bits 5–9 of the 8b/10b encoded data) are clocked on the falling edge of the clock. The TLK2201B and TLK2201BI provide a comprehensive series of built-in tests for self-test purposes including loopback and pseudorandom binary sequence (PRBS) generation and verification. An IEEE 1149.1 JTAG port is also supported. The TLK2201B and TLK2201BI are housed in a high performance, thermally enhanced, 64-pin VQFP PowerPAD package. Use of the PowerPAD package does not require any special considerations except to note that the PowerPAD, which is an exposed die pad on the bottom of the device, is a metallic thermal and electrical conductor. It is recommended that the TLK2201B and TLK2201BI PowerPADs be soldered to the thermal land on the board. The TLK2201B is characterized for operation from 0 °C to 70°C. The TLK2201BI is characterized for operation from –40 °C to 85°C. The TLK2201B and TLK2201BI use a 2.5-V supply. The I/O section is 3.3-V compatible. With the 2.5-V supply the chipset is very power-efficient, dissipating less than 200 mW typical power when operating at 1.25 Gbps. The TLK2201B and TLK2201BI are designed to be hot plug capable. A power-on reset causes RBC0, RBC1, the parallel output signal terminals, TXP, and TXN to be held in high-impedance state. The TLK2201B and TLK2201BI are the functional equivalent of the TNETE2201. There are several differences between the devices as noted below. Refer to Figure 12 in the application information section for an example of a typical application circuit. • The V CC is 2.5 V for the TLK2201B and TLK2201BI vs 3.3 V for TNETE2201. • The PLL filter capacitors on pins 16, 17, 48, and 49 of the TNETE2201 are no longer required. The TLK2201B and TLK2201BI uses these pins to provide added test capabilities. The capacitors, if present, do not affect the operation of the device. • No pulldown resistors are required on the TXP/TXN outputs. AVAILABLE OPTIONS PACKAGE TA PLASTIC QUAD FLAT PACK (RCP) 0 °C to 70°C TLK2201BRCP –40 °C to 85°C TLK2201BIRCP 2 Submit Documentation Feedback Copyright © 2003–2008, Texas Instruments Incorporated Product Folder Link(s): TLK2201B TLK2201BI |
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