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LTC2851IMS8#TRPBF

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Analog Devices RS-485/RS-422 ICs, MSOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LTC2851IMS8#TRPBF

Analog Devices · RS-485/RS-422 ICs · MSOP-8

LTC2851IMS8#TRPBF from Analog Devices, in a MSOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 VCC power_in Positive supply, 3V ≤ VCC ≤ 3.6V; bypass with a 0.1µF ceramic capacitor.
2 RO output Receiver output: high when A − B > 200mV, low when A − B < −200mV, and high when the inputs are open, shorted, or terminated without a valid signal; Hi-Z when the receiver is disabled.
3 DI input Driver input: a low forces Y low and Z high, and a high forces Y high and Z low; the LTC2851 has no DE pin.
4 GND power_in Ground reference for the device.
5 Y output Noninverting driver output for the LTC2851; high impedance when the driver is disabled or unpowered.
6 Z output Inverting driver output for the LTC2851; high impedance when the driver is disabled or unpowered.
7 B input Inverting receiver input; impedance is >96kΩ in receive mode or when unpowered.
8 A input Noninverting receiver input; impedance is >96kΩ in receive mode or when unpowered.

Key specifications

Parameter Value
Manufacturer Analog Devices
Package MSOP-8
Category Interface ICs
Pins 8

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply Voltage (VCC) recommended range VCC 3 3.6 V Pin function text: 3V ≤ VCC ≤ 3.6V 9
Operating Temperature (LTC285xI) -40 85 °C LTC285xI (Industrial grade) 2
Supply Voltage (VCC) absolute maximum VCC -0.3 7 V 2
Logic Input Voltages (RE, DE, DI) -0.3 7 V 2
Interface I/O voltage (A, B, Y, Z) 15 V Lower limit printed as (VCC, 15V) 2
Receiver Output Voltage (RO) RO -0.3 V Upper limit printed as (VCC + 0.3V) 2
Storage Temperature Range -65 150 °C 2
Maximum Junction Temperature TJMAX TJMAX 150 °C MS8 package 2
Driver Differential Output Voltage /VOD/ (R = ∞) /VOD/ 1.5 V R = ∞, VCC = 3V (Figure 1) 4
Driver Differential Output Voltage /VOD/ (R = 27Ω) /VOD/ 2 V R = 27Ω, VCC = 3V (Figure 1) 4
Difference in Magnitude of Driver Differential Output Voltage Δ/VOD/ 0.2 V R = 27Ω or 50Ω (Figure 1) 4
Driver Common Mode Output Voltage VOC 3 V R = 27Ω or 50Ω (Figure 1) 4
Difference in Magnitude of Driver Common Mode Output Voltage Δ/VOC/ 0.2 V R = 27Ω or 50Ω (Figure 1) 4
Driver Three-State (High Impedance) Output Current on Y and Z (C/I-Grade) IOZD -10 10 µA DE = 0V, (Y or Z) = -7V, 12V (LTC2852) 4
Maximum Driver Short-Circuit Current IOSD -250 250 mA -7V ≤ (Y or Z) ≤ 12V (Figure 2) 4
Receiver Input Current (A, B) at VIN = 12V (C, I-Grade) IIN 125 µA DE = TE = 0V, VCC = 0V or 3.3V, VIN = 12V (Figure 3) (C, I-Grade) 4
Receiver Input Current (A, B) at VIN = -7V (C, I-Grade) IIN -100 µA DE = TE = 0V, VCC = 0V or 3.3V, VIN = -7V (Figure 3) (C, I-Grade) 4
Receiver Input Resistance (C, I-Grade) RIN 96 125 kΩ RE = VCC or 0V, DE = TE = 0V, VIN = -7V, -3V, 3V, 7V, 12V (Figure 3) (C, I-Grade) 4
Receiver Differential Input Threshold Voltage VTH -0.2 0.2 V -7V ≤ B ≤ 12V 4
Receiver Output High Voltage VOH 2.4 V I(RO) = -4mA, A-B = 200mV, VCC = 3V 4
Receiver Output Low Voltage VOL 0.4 V I(RO) = 4mA, A-B = -200mV, VCC = 3V 4
Receiver Short-Circuit Current IOSR -85 85 mA 0V ≤ RO ≤ VCC 4
Logic Input High Voltage VIH 2 V VCC = 3.6V 4
Logic Input Low Voltage VIL 0.8 V VCC = 3V 4
Logic Input Current IINL -10 0 10 µA 4
Supply Current with Both Driver and Receiver Enabled ICCTR 450 1000 µA No Load, DE = VCC, RE = 0V 5
Maximum Data Rate fMAX 20 Mbps Guaranteed by other measured parameters (Note 3) 5
Driver Input to Output Propagation Delay tPLHD, tPHLD 10 50 ns RDIFF = 54Ω, CL = 100pF (Figure 4) 5
Driver Input to Output Propagation Delay Difference ΔtPD 1 6 ns RDIFF = 54Ω, CL = 100pF (Figure 4) 5
Driver Output Skew Y to Z tSKEWD -6 1 6 ns RDIFF = 54Ω, CL = 100pF (Figure 4) 5
Driver Rise or Fall Time tRD, tFD 4 12.5 ns RDIFF = 54Ω, CL = 100pF (Figure 4) 5
Receiver Input to Output Propagation Delay tPLHR, tPHLR 50 70 ns CL = 15pF, VCM = 1.5V, /VAB/ = 1.5V, tR and tF < 4ns (Figure 6) 5
Differential Receiver Skew tSKEWR 1 6 ns CL = 15pF (Figure 6) 5
Receiver Output Rise or Fall Time tRR, tFR 3 12.5 ns CL = 15pF (Figure 6) 5
Junction-to-Ambient Thermal Resistance θJA θJA 200 °C/W MS8 package 2
Junction-to-Case Thermal Resistance θJC θJC 40 °C/W MS8 package 2
Difference in Receiver Input Hysteresis ΔVTH 25 mV B = 0V 4

CAD (KiCad official)

  • Symbol: LTC2851IMS8#TRPBF
  • Footprint: Package_SO:MSOP-8_3x3mm_P0.65mm
  • 3D model: MSOP-8 (KiCad packages3D, STEP)
  • 3D model files: ltc2851ims8-trpbf-etched.step / ltc2851ims8-trpbf-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ltc2851ims8-trpbf.step / ltc2851ims8-trpbf.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Analog Devices datasheet (18 pp, sha256 68e25e1cc3687b9f, retrieved 2026-10-28, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF