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| LT1015 High Speed Dual Line Receiver FEATURES s s s s s s s DESCRIPTION The LT (R) 1015 is a dual high speed comparator intended for line receiver and other general purpose fast comparator functions. It has 10ns response time, true differential inputs, TTL outputs and operates from a single 5V supply. A unique output stage design virtually eliminates power supply glitching during transitions. This greatly reduces instability and crosstalk problems in multiple line applications. No minimum input slew rate is required as in previous TTL output comparators. The LT1015 has a true Latch pin for retaining output data. Setup time is 2ns, allowing the comparators to capture data much faster than the actual flowthrough response time. 8-pin miniDIP and ceramic packages allow high packing density. , LTC and LT are registered trademarks of Linear Technology Corporation. Response Time: 10ns Setup Time for Latch: 2ns Operates on Single 5V Supply Dual Function in 8-Pin Package No Input Slew Rate Requirement Latch Function Included on Chip True Differential Inputs APPLICATIONS s s s s High Speed Differential Line Receiver Pulse Height/Width Discriminator Timing and Delay Generators Analog to Digital Interface TYPICAL APPLICATION BLOCK DIAGRAM 2-Channel 20MHz Clocked Line Receiver 5V INPUT A V+ + 1/2 LT1015 CHANNEL A INPUT A + 1/2 LT1015 OUTPUT A LATCH (BOTH SIDES) DEVICE ACTIVE WITH LATCH LOW. "OPEN" GOES TO HIGH STATE OUTPUT B 1015 * BD - CLOCK INPUT B REFERENCE INPUT DATA LATCHED ON POSITIVE EDGE CHANNEL B INPUT B 1015 * TA01 - 1/2 LT1015 + - - + 1/2 LT1015 W U U U 1 LT1015 ABSOLUTE MAXIMUM RATINGS Supply Voltage .......................................................... 7V Differential Input Voltage ........................................... 5V Input Voltage Positive................................................ Supply + 0.5V Negative .............................................................. - 1V Input Current (Forced) Positive ............................ 20mA Latch Pin Voltage........................................ Supply + 1V Output Current (Continuous) .............................. 20mA Operating Temperature Range LT1015C .................................................. 0C to 70C LT1015M ........................................ - 55C to 125C* Storage Temperature ............................ - 65C to 150C Lead Temperature (Soldering, 10 sec).................. 300C *Air flow must be provided for TA > 100C PACKAGE/ORDER INFORMATION TOP VIEW INPUT A 1 REFERENCE 2 INPUT B 3 LATCH 4 J8 PACKAGE 8-LEAD CERDIP 8 7 6 5 V+ OUTPUT A GND OUTPUT B ORDER PART NUMBER LT1015CJ8 LT1015CN8 LT1015MJ8 N8 PACKAGE 8-LEAD PDIP TJMAX = 150C, JA = 100C/ W (J8) TJMAX = 100C, JA = 130C/ W (N8) Consult factory for Industrial grade parts. ELECTRICAL CHARACTERISTICS + PARAMETER Input Offset Voltage (Note 1) Input Bias Current Reference Input Current Voltage Gain (Note 3) Common Mode Input Range (Note 5) Output High Voltage Output Low Voltage Supply Current Latch Pin High Input Voltage Latch Pin Low Input Voltage Latch Pin Current Propagation Delay V = 4.6V to 5.4V, VLATCH = 0V, common mode input voltage = 2.5V, TJ = 25C, unless otherwise noted. CONDITIONS VCM = 1.25V to (V + - 1.5V) VIN = 0V (Note 2) VIN = 0V (Note 2) VOUT = 0.5V to 2.5V, Load = 1 TTL Gate Minimum Input Maximum Input IOUT = 4mA ISINK = 4mA V + = 5V Device Latched Device Active VIN 20mV (Note 4) 0C TJ 100C - 55C TJ 150C MIN q q q q q q q q q q q q q q 1000 V + - 1.5 2.5 TYP 1 15 30 2500 1.0 V + - 1.0 0.3 55 MAX 20 30 60 1.25 0.5 70 2 1 0.8 UNITS mV A A V/V V V V V mA V V mA ns ns ns 7 7 Latch Setup Time The q denotes specifications which apply over the full operating temperature range. Note 1: Input offset voltage is the maximum required to drive the output to a low state of 0.5V and high state of 2.5V. Note 2: Input currents are measured by applying a large positive differential input voltage. The resulting input current is divided by two to obtain input current at VIN = 0V. Note 3: Voltage gain is guaranteed by design, but not tested. Note 4: Propagation delay is sample tested in production with a large overdrive. The limit is guard banded to account for the slight increase ( 500ps) at 20mV overdrive. 10 10 2 14 16 Note 5: Common mode input range is the voltage range over which the differential input offset voltage is less than 20mV. If both inputs remain inside this common mode range, propagation delay will be unaffected. It will also be normal if the signal input is below the 1.25V lower limit when the input transition begins. An increase in propagation delay of up to 10ns may occur if the signal input is above the upper common mode limit when the transition begins. Sine wave inputs may not be affected when the peak exceeds the common mode range if the signal is inside the common mode range for 10ns before threshold is reached. 2 U W U U WW W LT1015 TYPICAL PERFORMANCE CHARACTERISTICS UW 40 Propagation Delay vs Overdrive 25 TJ = 25C 20 25 20 30 Propagation Delay vs Temperature 6 STEP SIZE = 100mV OVERDRIVE = 5mV OUTPUT LOAD CAPACITANCE = 10pF VS = 5V 4 2 Latch Set-Up Time TIME (ns) TIME (ns) 15 FALLING OUTPUT t PDHL 10 RISING OUTPUT tPDHL 5 0 50 100 -50 -25 25 75 0 JUNCTION TEMPERATURE (C) TIME (ns) 125 15 STEP SIZE = 100mV 0 -2 -4 -6 50 100 -50 -25 25 75 0 JUNCTION TEMPERATURE (C) 10 5 0 0 10 30 20 OVERDIRVE (mV) 50 125 LT1015 * TPC01 LT1015 * TPC02 LT1015 * TPC03 Output Low Voltage (VOL) 0.8 0.7 0.6 VOLTAGE (V) Output High Voltage (VOH) 5.0 6 Common Mode Limits VS = 5V 5 UPPER LIMIT* 4 3 2 1 VS = SINGLE 5V SUPPLY LOWER LIMIT VS = 5V, VIN = 30mV 4.5 OUTPUT VOLTAGE (V) VS = 5V 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.4 0.3 TJ = -55C TJ = 25C TJ = 125C TJ = 25C TJ = -55C 0.2 0.1 0 0 2 4 6 8 10 12 14 16 18 20 OUTPUT SINK CURRENT (mA) LT1015 * TPC04 INPUT VOLTAGE (V) TJ = 125C 0 2 4 6 8 10 12 14 16 18 20 OUTPUT SINK CURRENT (mA) LT1015 * TPC05 0 50 100 -50 -25 25 75 0 JUNCTION TEMPERATURE (C) 125 LT1015 * TPC06 * UPPER LIMIT TRACKS 5V SUPPLY. 4.1V LIMIT AT 25 C WILL DROP TO 3.8V WHEN VS = 4.7V Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. 3 LT1015 PACKAGE DESCRIPTION U Dimensions in inches (millimeters) unless otherwise noted. J8 Package 8-Lead CERDIP (Narrow 0.300, Hermetic) (LTC DWG # 05-08-1110) CORNER LEADS OPTION (4 PLCS) 0.300 BSC (0.762 BSC) 0.023 - 0.045 (0.584 - 1.143) HALF LEAD OPTION 0.045 - 0.068 (1.143 - 1.727) FULL LEAD OPTION 0.200 (5.080) MAX 0.015 - 0.060 (0.381 - 1.524) 0.005 (0.127) MIN 0.405 (10.287) MAX 8 7 6 5 0.008 - 0.018 (0.203 - 0.457) 0.385 0.025 (9.779 0.635) 0 - 15 0.025 (0.635) 0.125 RAD TYP 3.175 0.100 0.010 MIN (2.540 0.254) 0.220 - 0.310 (5.588 - 7.874) 0.045 - 0.068 (1.143 - 1.727) 0.014 - 0.026 (0.360 - 0.660) 1 2 3 4 NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS. J8 0694 N8 Package 8-Lead PDIP (Narrow 0.300) (LTC DWG # 05-08-1510) 0.300 - 0.325 (7.620 - 8.255) 0.045 - 0.065 (1.143 - 1.651) 0.130 0.005 (3.302 0.127) 0.400* (10.160) MAX 8 7 6 5 0.009 - 0.015 (0.229 - 0.381) 0.065 (1.651) TYP 0.005 (0.127) MIN 0.100 0.010 (2.540 0.254) 0.125 (3.175) MIN 0.018 0.003 (0.457 0.076) 0.015 (0.380) MIN 0.255 0.015* (6.477 0.381) ( +0.025 0.325 -0.015 8.255 +0.635 -0.381 ) 1 2 3 4 N8 0695 *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm) RELATED PARTS PART NUMBER LT1016 LT1116 LTC(R)1520 DESCRIPTION Ultrafast Precision Comparator 12ns, Single-Supply Ground Sensing Comparator 50Mbits/s Precision Quad Line Driver COMMENTS 10ms Propagation Delay, Complimentary TTL Outputs Inputs Can Exceed Positive Supply Up to 15V 18ns Propagation Delay Over Temperature Rail-to-Rail Inputs 4 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 q FAX: (408) 434-0507 q TELEX: 499-3977 LT/GP 1195 1K REV A * PRINTED IN USA (c) LINEAR TECHNOLOGY CORPORATION 1995 |
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