LT1015CN8

LT1015 High Speed Dual Line Receiver OBSOLETE: FOR INFORMATION PURPOSES ONLY Contact Linear Technology for Potential Replacement DESCRIPTION FEATURES ■ ■ ■ ■ ■ ■ U ■ 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 The LT ® 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. High Speed Differential Line Receiver Pulse Height/Width Discriminator Timing and Delay Generators Analog to Digital Interface 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. U APPLICATIONS ■ ■ ■ ■ , LTC and LT are registered trademarks of Linear Technology Corporation. BLOCK DIAGRAM W TYPICAL APPLICATION U 2-Channel 20MHz Clocked Line Receiver V+ 5V INPUT A + 1/2 LT1015 INPUT A CHANNEL A – + 1/2 LT1015 – 1/2 LT1015 – CLOCK INPUT B + DATA LATCHED ON POSITIVE EDGE REFERENCE INPUT LATCH (BOTH SIDES) DEVICE ACTIVE WITH LATCH LOW. “OPEN” GOES TO HIGH STATE – 1/2 CHANNEL B 1015 • TA01 INPUT B OUTPUT A +LT1015 OUTPUT B 1015 • BD 1 LT1015 W U U W W W 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 .................................................. 0°C to 70°C LT1015M ........................................ – 55°C to 125°C* Storage Temperature ............................ – 65°C to 150°C Lead Temperature (Soldering, 10 sec).................. 300°C U ABSOLUTE MAXIMUM RATINGS PACKAGE/ORDER INFORMATION ORDER PART NUMBER TOP VIEW INPUT A 1 8 V+ REFERENCE 2 7 OUTPUT A INPUT B 3 6 GND LATCH 4 5 OUTPUT B J8 PACKAGE 8-LEAD CERDIP LT1015CJ8 LT1015CN8 LT1015MJ8 N8 PACKAGE 8-LEAD PDIP TJMAX = 150°C, θJA = 100°C/ W (J8) TJMAX = 100°C, θJA = 130°C/ W (N8) Consult factory for Industrial grade parts. *Air flow must be provided for TA > 100°C ELECTRICAL CHARACTERISTICS + V = 4.6V to 5.4V, VLATCH = 0V, common mode input voltage = 2.5V, TJ = 25°C, unless otherwise noted. 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 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 ● ● ● ● ● ● ● 1000 V + – 1.5 2.5 ● TYP 1 15 30 2500 1.0 V + – 1.0 MAX 20 30 60 0.3 55 0.5 70 2 ● ● ∆VIN ≥ 20mV (Note 4) 0°C ≤ TJ ≤ 100°C – 55°C ≤ TJ ≤ 150°C The ● 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. ● ● 1.25 0.8 1 ● Latch Setup Time 2 MIN ● 7 7 10 10 2 14 16 UNITS mV µA µA V/V V V V V mA V V mA ns ns ns 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. LT1015 U W TYPICAL PERFORMANCE CHARACTERISTICS Propagation Delay vs Overdrive Propagation Delay vs Temperature 6 TJ = 25°C STEP SIZE = 100mV OVERDRIVE = 5mV OUTPUT LOAD CAPACITANCE = 10pF VS = 5V 25 20 TIME (ns) 15 STEP SIZE = 100mV 10 4 2 TIME (ns) 20 TIME (ns) Latch Set-Up Time 30 25 15 FALLING OUTPUT t PDHL 10 –2 RISING OUTPUT tPDHL 5 5 10 0 30 20 OVERDIRVE (mV) 40 –4 0 50 100 –50 –25 25 75 0 JUNCTION TEMPERATURE (°C) 0 50 –6 50 100 –50 –25 25 75 0 JUNCTION TEMPERATURE (°C) 125 LT1015 • TPC02 LT1015 • TPC01 Output Low Voltage (VOL) Common Mode Limits 5.0 OUTPUT VOLTAGE (V) TJ = –55°C 0.4 TJ = 25°C 0.3 TJ = 125°C 0.2 0.1 VS = 5V VS = 5V 4.5 0.6 0.5 6 5 4.0 TJ = 125°C 3.5 INPUT VOLTAGE (V) VS = 5V, VIN = 30mV 0.7 TJ = 25°C 3.0 TJ = –55°C 2.5 2 4 6 8 10 12 14 16 18 20 OUTPUT SINK CURRENT (mA) LT1015 • TPC04 3 2 VS = SINGLE 5V SUPPLY LOWER LIMIT 1 1.0 0 UPPER LIMIT* 4 2.0 1.5 0 125 LT1015 • TPC03 Output High Voltage (VOH) 0.8 VOLTAGE (V) 0 0 2 4 6 8 10 12 14 16 18 20 OUTPUT SINK CURRENT (mA) 0 50 100 –50 –25 25 75 0 JUNCTION TEMPERATURE (°C) 125 LT1015 • TPC06 LT1015 • TPC05 * 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 U PACKAGE DESCRIPTION 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) 0.023 – 0.045 (0.584 – 1.143) HALF LEAD OPTION 0.300 BSC (0.762 BSC) 0.045 – 0.068 (1.143 – 1.727) FULL LEAD OPTION 0.008 – 0.018 (0.203 – 0.457) 0.200 (5.080) MAX 0.015 – 0.060 (0.381 – 1.524) 0.005 (0.127) MIN 0.405 (10.287) MAX 8 6 7 5 0° – 15° 0.025 (0.635) 0.125 RAD TYP 3.175 0.100 ± 0.010 MIN (2.540 ± 0.254) 0.045 – 0.068 (1.143 – 1.727) 0.385 ± 0.025 (9.779 ± 0.635) 0.014 – 0.026 (0.360 – 0.660) 0.220 – 0.310 (5.588 – 7.874) 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) 0.009 – 0.015 (0.229 – 0.381) ( +0.025 0.325 –0.015 8.255 +0.635 –0.381 ) 0.045 – 0.065 (1.143 – 1.651) 0.130 ± 0.005 (3.302 ± 0.127) 0.065 (1.651) TYP 0.005 (0.127) MIN 0.100 ± 0.010 (2.540 ± 0.254) 0.125 (3.175) MIN 0.015 (0.380) MIN 0.018 ± 0.003 (0.457 ± 0.076) 0.400* (10.160) MAX 8 7 6 5 1 2 3 4 0.255 ± 0.015* (6.477 ± 0.381) 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 DESCRIPTION COMMENTS LT1016 Ultrafast Precision Comparator 10ms Propagation Delay, Complimentary TTL Outputs LT1116 12ns, Single-Supply Ground Sensing Comparator Inputs Can Exceed Positive Supply Up to 15V LTC®1520 50Mbits/s Precision Quad Line Driver 18ns Propagation Delay Over Temperature Rail-to-Rail Inputs 4 Linear Technology Corporation LT/GP 1195 1K REV A • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● TELEX: 499-3977  LINEAR TECHNOLOGY CORPORATION 1995