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TLK1221RHAT Datasheet(PDF) 2 Page - Texas Instruments |
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TLK1221RHAT Datasheet(HTML) 2 Page - Texas Instruments |
2 / 23 page www.ti.com Differences Between TLK2201B, TLK2201BI, TLK1221, and TNETE2201 2:1 MUX PRBS Generator 10Bit Registers TD(0–9) PRBSEN LOOPEN Parallelto Serial PhaseGenerator Clock REFCLK Control Logic ENABLE Interpolator and ClockExtraction PRBS Verification SerialtoParallel and CommaDetect Clock RBC1 RBC0 SYNC/PASS RD(0–9) SYNCEN 2:1 MUX 2:1 MUX Clock Data TXP TXN RXP RXN RBCMODE TLK1221 SLLS713 – FEBRUARY 2007 The TLK1221 is housed in a high-performance, thermally enhanced, 40-pin QFN package. Use of this package does not require any special considerations except to note that the pad, which is an exposed die pad on the bottom of the device, is a metallic thermal and electrical conductor. It is required that the TLK1221 pad be soldered to the thermal land on the board as it serves as the main ground connection for the device. The TLK1221 is characterized for operation from –40 °C to 85°C. This device uses 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 TLK1221 is 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 the high-impedance state. The TLK1221 is 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. • V CC is 2.5 V for the TLK2201B, TLK2201BI, TLK1221, and TLK1201A 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, TLK2201BI, TLK1221, and TLK1201A use 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. • The TLK1221 is a QFN version of the TLK2201B optimized for GBE-only TBI-mode operation with no JTAG functionality. Functional Block Diagram 2 Submit Documentation Feedback |
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