LTC2855 Linear Technology, LTC2855 Datasheet
LTC2855
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LTC2855 Summary of contents
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... Excessive power dissipation caused by bus contention or a fault is prevented by current limiting all outputs and by a thermal shutdown. Enhanced ESD protection allows the LTC2854 to withstand ±25kV (human body model) and the LTC2855 to withstand ±15kV on the transceiver interface pins without latchup or damage. PRODUCT SELECTION GUIDE ...
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... For more information on lead free part marking, go to: For more information on tape and reel specifi cations, go to: 2 (Note 1) Operating Temperature (Note 4) LTC2854C, LTC2855C .............................. 0°C to 70°C LTC2854I, LTC2855I ............................ –40°C to 85°C –15V) to +15V LTC2854H, LTC2855H ........................ –40°C to 125°C CC Storage Temperature Range ................... –65°C to 150°C +0.3V) ...
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... 50Ω 3.13V (Figure 27Ω 50Ω (Figure 27Ω 50Ω (Figure 27Ω 50Ω (Figure OV –7V, 12V (LTC2855) –7V ≤ ≤ 12V (Figure 0V 3.3V 12V CC IN (Figure 3) (C, I-Grade 0V ...
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... ⎯ R ⎯ 0V LTC2854, Human Body Model LTC2855, Human Body Model The denotes the specifi cations which apply over the full operating ● = 25° 3.3V unless otherwise noted (Note 2 CONDITIONS ...
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... DE R GND GND 285455 F05a Figure 5. Driver Enable and Disable Timing Measurements LTC2854/LTC2855 Y I OSD DRIVER Z 285455 F01-2 Figure 2. Driver Output Short-Circuit Current PLHD PHLD 0V t SKEWD V 1 90% 90 ...
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... LTC2854/LTC2855 TEST CIRCUITS A ± RECEIVER CM B ± www.DataSheet4U.com RECEIVER RECEIVER A-B – 285455 F06a Figure 6. Receiver Propagation Delay Measurements GND ...
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... Receiver Propagation Delay vs Temperature 1. 15pF –40 – TEMPERATURE (˚C) 285455 G07 LTC2854/LTC2855 T = 25° 3.3V, unless otherwise noted Driver Propagation Delay vs Temperature 54Ω DIFF C = 100pF 120 –40 –20 0 ...
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... A and B. GND (Pins 6,11/6,13/6): Ground. Pins 11 and 13 are backside thermal pad, connected to Ground. Y (Pins NA/8/12): Positive Driver Output for LTC2855. Z (Pins NA/9/13): Negative Driver Output for LTC2855. B (Pins 9/10/14): Negative Receiver Input (and Negative Driver Output for LTC2854). A (Pins 8/11/15): Positive Receiver Input (and Positive Driver Output for LTC2854) ...
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... TERMINATOR HIGH-Z DRIVEN OFF HIGH-Z DRIVEN ON HIGH-Z HIGH-Z OFF HIGH-Z HIGH-Z ON DRIVEN DRIVEN OFF DRIVEN DRIVEN ON DRIVEN HIGH-Z OFF DRIVEN HIGH-Z ON LTC2855 (15kV) SLEEP/SHUTDOWN 120Ω LOGIC AND DELAY R TERM TE 125k R IN RECEIVER B (15kV) 125k (15kV) DRIVER Y (15kV) GND ...
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... APPLICATIONS INFORMATION Driver The driver provides full RS485/RS422 compatibility. When enabled high, Y-Z is positive for the full-duplex device (LTC2855) and A-B is positive for the half-duplex device (LTC2854). When the driver is disabled, both outputs are high- impedance. For the full-duplex LTC2855, the leakage on the driver output pins is guaranteed to be less than 10μ ...
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... If the cable is not terminated with its char- acteristic impedance, refl ections will result in distorted waveforms. The LTC2854/LTC2855 are the fi rst 3.3V RS485/RS422 transceivers to offer integrated switchable termination resistors on the receiver input pins. This provides the advantage of being able to easily change, through logic control, the line termination for optimal performance when www ...
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... For example the full duplex LTC2855, DI and A/B should not be routed near the driver or receiver outputs. The logic inputs of the LTC2854/LTC2855 have 150mV of hysteresis to provide noise immunity. Fast edges on the outputs can cause glitches in the ground and power supplies which are exacerbated by capacitive loading ...
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... Package 10-Lead Plastic DFN (3mm × 3mm) (Reference LTC DWG # 05-08-1699) 0.675 ±0.05 PIN 1 PACKAGE TOP MARK OUTLINE (SEE NOTE 6) 0.200 REF 0.50 BSC LTC2854/LTC2855 LTC2854 B "A" A "B" 285455 TA03 R = 0.115 TYP 6 3.00 ±0.10 1.65 ± 0.10 (4 SIDES) (2 SIDES) 5 0.75 ±0.05 2.38 ±0.10 (2 SIDES) 0.00 – ...
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... LTC2854/LTC2855 PACKAGE DESCRIPTION 3.60 ±0.05 1.70 ±0.05 2.20 ±0.05 (2 SIDES) www.DataSheet4U.com RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS PIN 1 TOP MARK (NOTE 6) 0.200 REF NOTE: 1. DRAWING PROPOSED VARIATION OF VERSION (WGED) IN JEDEC PACKAGE OUTLINE M0-229 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS 4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH ...
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... DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE INCHES **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD (MILLIMETERS) FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE LTC2854/LTC2855 .189 – .196* (4.801 – 4.978) .009 (0.229 ...
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... LTC2854/LTC2855 TYPICAL APPLICATION www.DataSheet4U.com LTC2854 3.3V D RELATED PARTS PART NUMBER DESCRIPTION LTC485 Low Power RS485 Interface Transceiver LTC491 Differential Driver and Receiver Pair LTC1480 3.3V Ultralow Power RS485 Transceiver LTC1483 Ultralow Power RS485 Low EMI Transceiver LTC1485 Differential Bus Transceiver LTC1487 Ultralow Power RS485 with Low EMI, Shutdown and High ...