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DS25C400 Dataheets PDF



Part Number DS25C400
Manufacturers National Semiconductor
Logo National Semiconductor
Description Quad 2.5 Gbps Serializer/Deserializer
Datasheet DS25C400 DatasheetDS25C400 Datasheet (PDF)

www.DataSheet4U.com DS25C400 Quad 2.5 Gbps Serializer/Deserializer PRELIMINARY September 2002 DS25C400 Quad 2.5 Gbps Serializer/Deserializer General Description The DS25C400 is a four-channel serializer/deserializer (SERDES) for high-speed serial data transmission over controlled impedance transmission media such as a printed circuit board backplane or twin-axial cable. It is capable of transmitting and receiving serial data of 2.125 - 2.5 Gbps or 1.0625 - 1.25 Gbps per channel. Each transmit.

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www.DataSheet4U.com DS25C400 Quad 2.5 Gbps Serializer/Deserializer PRELIMINARY September 2002 DS25C400 Quad 2.5 Gbps Serializer/Deserializer General Description The DS25C400 is a four-channel serializer/deserializer (SERDES) for high-speed serial data transmission over controlled impedance transmission media such as a printed circuit board backplane or twin-axial cable. It is capable of transmitting and receiving serial data of 2.125 - 2.5 Gbps or 1.0625 - 1.25 Gbps per channel. Each transmit section of the DS25C400 contains a low-jitter clock synthesizer, an 8-bit or 10-bit parallel to serial converter with built in 8b/10b encoder, and a CML output driver with selectable pre-emphasis optimized for backplane applications. Its receive section contains an input limiting amplifier with on-chip terminations and selectable equalization levels, a clock/data recovery PLL, a comma detector and a serial to parallel converter with built-in 8b/10b decoder. The DS25C400 has built-in local loopback test mode, pseudo-random pattern generator and error detector to support self-testing. The DS25C400 requires no external components for its clock synthesizers and clock recovery PLL’s. Three external resistors are needed to set the proper bias currents and compensate for process variations to achieve tight tolerance on-chip terminations. Features n Quad Serializer/Deserializer n Data rate per channel: 2.125 - 2.5 Gbps or 1.0625 1.25 Gbps n Supports 106.25 - 125 MHz differential reference input clock n Low jitter clock synthesizers for clock distribution n 8-bit or 10-bit parallel I/O Interface conforms to SSTL_18 Class 1 (also interfaces to 1.8V HSTL or 1.8V LVCMOS) n On-chip 8b/10b encoder and decoder n High speed serial CML drivers n High speed serial CML on-chip terminations n Selectable pre-emphasis and equalization n On-chip Comma Detect for character alignment n On-chip local loopback test mode n On-chip pattern generator and error checker to support BIST n Hot plug protection n Low power, 420 mW (typ) per channel n 324-ball TE-PBGA package n Operating temperature −40˚C to +85˚C General Function Diagram 20030101 © 2002 National Semiconductor Corporation DS200301 www.national.com DS25C400 www.DataSheet4U.com Functional Block Diagram 20030102 www.national.com 2 www.DataSheet4U.com DS25C400 Absolute Maximum Ratings (Note 1) Maximum Package Power Dissipation at 25˚C DS25C400TUT Derating above 25˚C Thermal Resistance, θJA Junction-to-case Conductive Thermal Resistance, θJC ESD Rating HBM, 1.5 kΩ, 100 pF EIAJ, 0Ω, 200 pF 5.68 W 45.45 mW/˚C 22 ˚C/W 6.5 ˚C/W If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (VDDQ, DVDD) Supply Voltage (VDDIO, VDDHS, VDDB) SSTL Input Voltage LVCMOS Input Voltage LVCMOS Output Voltage CML Receiver Input Voltage CML Driver Output Voltage Junction Temperature Storage Temperature Lead Temperature Soldering, 4 Seconds −0.3V to +2.3V −0.3V to +3.0V −0.3V to (VDDQ + 0.3V) −0.3V to (DVDD + 0.3V) −0.3V to (DVDD + 0.3V) −0.3V to (VDDHS + 0.3V) −0.3V to (VDDHS + 0.3V) +125˚C −65˚C to +150˚C +260˚C > 2 kV > 200 V Recommended Operating Conditions Min Supply Voltage VDDQ and DVDD to DGND 1.7 2.35 Temperature Supply Noise Amplitude Supply Noise Frequency −40 1.8 2.5 25 1.9 2.65 85 V V ˚C VDDIO, VDDHS and VDDB to DGND or AGND Typ Max Unit < 100mVP-P < 1 MHz Electrical Characteristics Over recommended operating supply and temperature ranges unless otherwise specified. Symbol Parameter Conditions Min Typ (Note 2) 0.90 VREF Max Units SSTL_18 DC SPECIFICATIONS — Parallel I/O, Class I VREF VTT VIH (dc) VIH (ac) VIL (dc) VIL (ac) IIH IIL VOH (dc) Reference Voltage Termination Voltage High Level Input Voltage AC Input Logic High Low Level Input Voltage AC Input Logic Low High Level Input Current Low Level Input Current High Level Output Voltage VIN = VDDQ = 1.9 V VIN = GND, VDDQ = 1.9 V IOH = −6.3 mA, Unterminated, CL = 8pF Terminated, R = 50 Ω to VTT VOL (dc) Low Level Output Voltage IOL = 6.3 mA, Unterminated, CL = 8pF Terminated, R = 50 Ω to VTT LVCMOS DC SPECIFICATIONS — Control Pins EIA/JESD8-7 Compliant VIH VIL High Level Input Voltage Low Level Input Voltage 0.65* DVDD 0 DVDD 0.35* DVDD V V −10 −10 VDDQ −0.400 VDDQ −0.550 0.400 0.550 0.83 VREF − 0.04 VREF +0.125 VREF +0.250 −0.300 VREF −0.125 VREF −0.250 +50 +10 0.97 VREF + 0.04 VDDQ +0.300 V V V V V V µA µA V V V V 3 www.national.com DS25C400 www.DataSheet4U.com Electrical Characteristics Over recommended operating supply and temperature ranges unless otherwise specified. (Continued) Symbol Parameter Conditions Min Typ (Note 2) Max Units LVCMOS DC SPECIFICATIONS — Control Pins EIA/JESD8-7 Compliant IIH IIH IIL IIL VOH VOL IDD High Level Input Current High Level Input Current Low Level Input Current Low Level Input Current High Level Output Voltage Low Level Output Voltage Total Supply Current VIN = DVDD = .


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