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LTC2851IS8#TRPBF

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

componentinterface icsltc2851is8#trpbffactory-2.0.0extractor-text

Verified LTC2851IS8#TRPBF

by Ray · last 30 Oct 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

30 Oct 2026RayPublished by the parts factory: tier mfr, 8 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: LTC2851IS8#TRPBF · SO-8 · 8 pins
  • ✓copper: 8 copper pads, none touching another net
  • ✓datasheet: all 8 pin names found in the 18-page datasheet
  • ✓distributor: lcsc C682763, digikey 505-LTC2851IS8#TRPBFTR-ND, mouser 584-LTC2851IS8#TRPBF
  • ✓family: SOIC-8_3.9x4.9mm_P1.27mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-t30h9og5/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • ✓package_fit: height and body within the datasheet's package drawing (datasheet p.16)
  • ✓pads: 8 pins = 8 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 8 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ ltc2851is8-trpbf.kicad_sym✓ ltc2851is8-trpbf.kicad_mod✓ ltc2851is8-trpbf.step
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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 10d ago
viewers ltc2851is8-trpbf: viewers · Ray 10d ago
ltc2851is8-trpbf-etched.glb Publish 0.1.0 · Ray 10d ago
ltc2851is8-trpbf-etched.step ltc2851is8-trpbf: factory component page (tier=mfr) · Ray 10d ago
ltc2851is8-trpbf-hero.glb ltc2851is8-trpbf: hero GLB from the etched model (keeps the MPN mark) · Ray 10d ago
ltc2851is8-trpbf-hero.overlay.json Publish 0.1.0 · Ray 10d ago
ltc2851is8-trpbf.glb Publish 0.1.0 · Ray 10d ago
ltc2851is8-trpbf.kicad_mod Publish 0.1.0 · Ray 10d ago
ltc2851is8-trpbf.kicad_sym Publish 0.1.0 · Ray 10d ago
ltc2851is8-trpbf.lbr Publish 0.1.0 · Ray 10d ago
ltc2851is8-trpbf.step Publish 0.1.0 · Ray 10d ago
package.json Publish 0.1.0 · Ray 10d ago
page.json Set visibility: public · Ray 10d ago
README.md Publish 0.1.0 · Ray 10d ago
verification.json Verified: Published by the parts factory: tier mfr, 8 pins · Ray 10d ago

LTC2851IS8#TRPBF

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

LTC2851IS8#TRPBF from Analog Devices, in a SO-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 by 200mV, low when A < B by 200mV, and high if the receiver inputs are open, shorted or terminated without a valid signal.
3 DI input Driver input: a high forces Y high and Z low, a low forces Y low and Z high; the LTC2851 has no driver enable so the driver is always enabled.
4 GND power_in Ground.
5 Y output Noninverting driver output, high impedance when the driver is disabled or unpowered.
6 Z output Inverting driver output, high impedance when the driver is disabled or unpowered.
7 B input Inverting receiver input, with impedance >96kΩ in receive mode or unpowered.
8 A input Noninverting receiver input, with impedance >96kΩ in receive mode or unpowered.

Key specifications

Parameter Value
Manufacturer Analog Devices
Package SO-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
Differential Driver Output Voltage (R = ∞, VCC = 3V) /VOD/ 1.5 V R = ∞, VCC = 3V (Figure 1); VCC-level max printed as VCC 4
Differential Driver Output Voltage (R = 27Ω, VCC = 3V) /VOD/ 2 V R = 27Ω, VCC = 3V (Figure 1); VCC-level max printed as VCC 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
Maximum Driver Short-Circuit Current IOSD -250 180 250 mA -7V ≤ (Y or Z) ≤ 12V (Figure 2) 4
Receiver Input Current (A, B), VIN = 12V IIN 125 µA DE = TE = 0V, VCC = 0V or 3.3V, VIN = 12V (Figure 3) (C, I-Grade) 4
Receiver Input Current (A, B), VIN = -7V IIN -100 µA DE = TE = 0V, VCC = 0V or 3.3V, VIN = -7V (Figure 3) (C, I-Grade) 4
Receiver Input Resistance 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
Maximum Data Rate fMAX 20 Mbps 5
Driver Input to Output Propagation Delay tPLHD, tPHLD 10 50 ns RDIFF = 54Ω, CL = 100pF (Figure 4) 5
Driver Input to Output Difference ΔtPD 1 6 ns RDIFF = 54Ω, CL = 100pF (Figure 4) 5
Driver Output Y to Output Z Skew 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
Supply Current with Both Driver and Receiver Enabled ICCTR 450 1000 µA No Load, DE = VCC, RE = 0V 5
Supply Voltage (recommended) VCC 3 3.6 V 9
Operating Temperature Range (LTC285xI) TA -40 85 °C Industrial grade (I) 2
Supply Voltage (absolute maximum) VCC -0.3 7 V 2
Logic Input Voltages (DI) -0.3 7 V Pins RE, DE, DI; only DI applies to LTC2851 2
Interface I/O Voltage (A, B, Y, Z) 15 V Minimum printed as (VCC, 15V) 2
Receiver Output Voltage (RO) RO -0.3 V Maximum printed as (VCC + 0.3V) 2
Storage Temperature Range TSTG -65 150 °C 2
Maximum Junction Temperature TJMAX 150 °C S8 package 2
Thermal Resistance, Junction to Ambient (S8) θJA 150 °C/W S8 package (8-lead plastic SO) 2
Thermal Resistance, Junction to Case (S8) θJC 39 °C/W S8 package (8-lead plastic SO) 2

CAD (KiCad official)

  • Symbol: LTC2851IS8#TRPBF
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SO-8 (KiCad packages3D, STEP)
  • 3D model files: ltc2851is8-trpbf-etched.step / ltc2851is8-trpbf-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ltc2851is8-trpbf.step / ltc2851is8-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 2026-10-30, 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