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SN65ELT20 Dataheets PDF



Part Number SN65ELT20
Manufacturers Texas Instruments
Logo Texas Instruments
Description 5-V TTL-to-Differential PECL Translator
Datasheet SN65ELT20 DatasheetSN65ELT20 Datasheet (PDF)

SN65ELT20 www.ti.com SLLS922A – DECEMBER 2008 – REVISED MARCH 2012 5-V TTL-to-Differential PECL Translator Check for Samples: SN65ELT20 FEATURES 1 • 1.25-ns Maximum Propagation Delay • Operating Range: VCC = 4.2 V to 5.7 V With GND = 0 V • Flow-Through Pinout Enables Easy Layout • Built-In Temperature Compensation • Drop-In Compatible With MC10ELT20, MC100ELT20 APPLICATIONS • Data and Clock Transmission Over Backplane • Signaling Level Conversion for Clock or Data DESCRIPTION The SN65ELT20 i.

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SN65ELT20 www.ti.com SLLS922A – DECEMBER 2008 – REVISED MARCH 2012 5-V TTL-to-Differential PECL Translator Check for Samples: SN65ELT20 FEATURES 1 • 1.25-ns Maximum Propagation Delay • Operating Range: VCC = 4.2 V to 5.7 V With GND = 0 V • Flow-Through Pinout Enables Easy Layout • Built-In Temperature Compensation • Drop-In Compatible With MC10ELT20, MC100ELT20 APPLICATIONS • Data and Clock Transmission Over Backplane • Signaling Level Conversion for Clock or Data DESCRIPTION The SN65ELT20 is a TTL-to-differential PECL translator. It operates on a 5-V supply and ground only. The output is undetermined when the inputs are left floating. The low output skew makes the device an ideal solution for clock or data signal translation. The SN65ELT20 is housed in an industry-standard SOIC-8 package and is also available in a TSSOP-8 package. PINOUT ASSIGNMENT D-8, DGK-8 Package (Top View) NC 1 TTL Q2 PECL Q3 8 VCC 7D 6 NC NC 4 5 GND PIN D Q,Q VCC GND Table 1. Pin Description TTL input PECL outputs Positive supply Ground FUNCTION P0065-04 PART NUMBER SN65ELT20D SN65ELT20DGK ORDERING INFORMATION(1) PART MARKING PACKAGE SN65ELT20 SOIC SN65ELT20 SOIC-TSSOP (1) Leaded device options not initially available; contact a sales representative for further details. LEAD FINISH NiPdAu NiPdAu 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2008–2012, Texas Instruments Incorporated SN65ELT20 SLLS922A – DECEMBER 2008 – REVISED MARCH 2012 www.ti.com 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. ABSOLUTE MAXIMUM RATINGS(1) PARAMETER Absolute PECL-mode supply voltage VIN input voltage Output current Operating temperature range Storage temperature range CONDITIONS VCC (GND = 0 V) GND = 0 V; VI ≤ VCC Continuous Surge VALUE 6 6 50 100 –40 to 85 –65 to 150 UNIT V V mA mA °C °C (1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. POWER DISSIPATION RATINGS PACKAGE CIRCUIT-BOARD MODEL POWER RATING TA < 25°C (mW) Low-K 719 SOIC High-K 840 Low-K 469 SOIC-TSSOP High-K 527 THERMAL RESISTANCE, JUNCTION-TO-AMBIENT, NO AIRFLOW 139 119 213 189 DERATING FACTOR TA > 25°C (mW/°C) 7 8 5 5 POWER RATING TA = 85°C (mW) 288 336 188 211 THERMAL CHARACTERISTICS PARAMETER θJB Junction-to-board thermal resistance θJC Junction-to-case thermal resistance PACKAGE SOIC SOIC-TSSOP SOIC SOIC-TSSOP VALUE 79 120 98 74 UNIT °C/W °C/W KEY ATTRIBUTES CHARACTERISTIC Moisture sensitivity level Flammability rating (oxygen index: 28 to 34) ESD—human body model ESD—machine model ESD—charged-device model Meets or exceeds JEDEC Spec EIA/JESD78 latchup test VALUE SO-8: Level 1 TSSOP-8: Level 3 UL 94 V-0 at 0.125 in >4 kV 200 V 2 kV 2 Copyright © 2008–2012, Texas Instruments Incorporated SN65ELT20 www.ti.com SLLS922A – DECEMBER 2008 – REVISED MARCH 2012 PECL DC CHARACTERISTICS(1) (VCC = 5 V; GND = 0 V)(2) PARAMETER –40°C MIN TYP MAX 25°C MIN TYP MAX 85°C MIN TYP MAX UNIT ICC Power-supply current VOH Output HIGH voltage(3) VOL Output LOW voltage (3) 9.6 16 10.1 16 10.7 16 mA 3915 3958 4120 3915 3963 4120 3915 3967 4120 mV 3170 3247 3380 3170 3244 3380 3170 3244 3380 mV (1) The device meets these specifications after thermal equilibrium has been established when mounted in a test socket or printed-circuit board with maintained transverse airflow greater than 500 lfpm (2.54 m/s). Electrical parameters are assured only over the declared operating temperature range. Functional operation of the device exceeding these conditions is not implied. Device specification limit values are applied individually under normal operating conditions and are not valid simultaneously. (2) Output parameters vary 1:1 with Vcc. (3) Outputs are terminated through a 50-Ω resistor to VCC – 2 V. TTL INPUT DC CHARACTERISTICS(1) (VCC = 4.2 V to 5.7 V; TA = –40°C to 85°C) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT IIH Input HIGH current IIH IIL Input LOW current VIK Input clamp diode voltage VIH Input HIGH voltage VIL Input LOW voltage VIN = 2.7 V VIN =.


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