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ADM4850ARZ-REEL7

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

componentcommunication interface chip-uart-485-232adm4850arz-reel7factory-2.0.0extractor-text

Verified ADM4850ARZ-REEL7

by Ray · last 2 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

2 Nov 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: ADM4850ARZ-REEL7 · SOIC-8 · 8 pins
  • ✓copper: 8 copper pads, none touching another net
  • ✓datasheet: all 8 pin names found in the 16-page datasheet
  • ✓distributor: lcsc C658245, digikey 505-ADM4850ARZ-REEL7TR-ND, mouser 584-ADM4850ARZ-R7
  • ✓family: SOIC-8_3.9x4.9mm_P1.27mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-cwlh5b03/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 8 pins = 8 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 8 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ adm4850arz-reel7.kicad_sym✓ adm4850arz-reel7.kicad_mod✓ adm4850arz-reel7.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 1d ago
viewers adm4850arz-reel7: viewers · Ray 1d ago
adm4850arz-reel7-etched.glb Publish 0.1.0 · Ray 1d ago
adm4850arz-reel7-etched.step adm4850arz-reel7: factory component page (tier=mfr) · Ray 1d ago
adm4850arz-reel7-hero.glb adm4850arz-reel7: hero GLB from the etched model (keeps the MPN mark) · Ray 1d ago
adm4850arz-reel7-hero.overlay.json Publish 0.1.0 · Ray 1d ago
adm4850arz-reel7.glb Publish 0.1.0 · Ray 1d ago
adm4850arz-reel7.kicad_mod Publish 0.1.0 · Ray 1d ago
adm4850arz-reel7.kicad_sym Publish 0.1.0 · Ray 1d ago
adm4850arz-reel7.lbr Publish 0.1.0 · Ray 1d ago
adm4850arz-reel7.step Publish 0.1.0 · Ray 1d ago
package.json Publish 0.1.0 · Ray 1d ago
page.json Set visibility: public · Ray 1d ago
README.md Publish 0.1.0 · Ray 1d ago
verification.json Verified: Published by the parts factory: tier mfr, 8 pins · Ray 1d ago

ADM4850ARZ-REEL7

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

ADM4850ARZ-REEL7 from Analog Devices, in a SOIC-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 RO output Receiver output: when RO is enabled and (A − B) ≥ −30 mV, RO is high; when enabled and (A − B) ≤ −200 mV, RO is low.
2 RE input Active-low receiver output enable: a low level enables RO, and a high level places RO into a high impedance state.
3 DE input Driver output enable: a high level enables the driver differential outputs A and B, and a low level places them into a high impedance state.
4 DI input Driver input: when the driver is enabled, a logic low forces A low and B high, and a logic high forces A high and B low.
5 GND power_in Ground.
6 A bidirectional Noninverting receiver input A and noninverting driver output A.
7 B bidirectional Inverting receiver input B and inverting driver output B.
8 VCC power_in 5 V power supply.

Key specifications

Parameter Value
Manufacturer Analog Devices
Package SOIC-8
Category Communication Interface Chip/UART/485/232
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 Output Voltage (RS-422 load) VOD 2 5 V R = 50 Ω (RS-422), see Figure 19 3
Differential Output Voltage (RS-485 load) VOD 1.5 5 V R = 27 Ω (RS-485), see Figure 19 3
Differential Output Voltage over Common-Mode Range /VOD3/ 1.5 5 V VTST = −7 V to +12 V, see Figure 20 3
Delta /VOD/ for Complementary Output States Δ/VOD/ 0.2 V R = 27 Ω or 50 Ω, see Figure 19 3
Common-Mode Output Voltage VOC 3 V R = 27 Ω or 50 Ω, see Figure 19 3
Delta /VOC/ for Complementary Output States Δ/VOC/ 0.2 V R = 27 Ω or 50 Ω, see Figure 19 3
Output Short-Circuit Current (VOUT = High) IOUT -200 200 mA −7 V < VOUT < +12 V 3
Output Short-Circuit Current (VOUT = Low) IOUT -200 200 mA −7 V < VOUT < +12 V 3
CMOS Input Logic Threshold Low 0.8 V 3
CMOS Input Logic Threshold High 2 V 3
CMOS Logic Input Current (DI) -1 1 µA 3
Differential Input Threshold Voltage VTH -200 -125 -30 mV −7 V < VOC < +12 V 3
Input Resistance (A, B) 96 150 kΩ −7 V < VOC < +12 V 3
Input Current (A, B) 0.125 mA VIN = 12 V 3
Input Current (A, B) -0.1 mA VIN = −7 V 3
CMOS Logic Input Current (RE) -1 1 µA 3
CMOS Output Voltage Low 0.4 V IOUT = 4 mA 3
CMOS Output Voltage High 4 V IOUT = −4 mA 3
Receiver Output Short-Circuit Current 7 85 mA VOUT = GND or VCC 3
Three-State Output Leakage Current -2 2 µA 0.4 V ≤ VOUT ≤ 2.4 V 3
Supply Current in Shutdown (115 kbps) ICC 5 µA DE = 0 V, RE = VCC (shutdown) 3
Supply Current, Receive (115 kbps) ICC 36 60 µA DE = 0 V, RE = 0 V 3
Supply Current, Transmit (115 kbps) ICC 100 160 µA DE = VCC 3
Driver Propagation Delay tPLH, tPHL 600 2500 ns RLDIFF = 54 Ω, CL1 = CL2 = 100 pF, see Figure 21 and Figure 25 4
Driver Skew tSKEW 70 ns RLDIFF = 54 Ω, CL1 = CL2 = 100 pF, see Figure 21 and Figure 25 4
Driver Rise/Fall Time tR, tF 600 2400 ns RLDIFF = 54 Ω, CL1 = CL2 = 100 pF, see Figure 21 and Figure 25 4
Driver Enable Time tZH, tZL 2000 ns RL = 500 Ω, CL = 100 pF, see Figure 22 and Figure 27 (ADM4850 only) 4
Driver Disable Time tLZ, tHZ 2000 ns RL = 500 Ω, CL = 15 pF, see Figure 22 and Figure 27 (ADM4850 only) 4
Driver Enable Time from Shutdown 4000 ns RL = 500 Ω, CL = 100 pF, see Figure 22 (ADM4850 only) 4
Receiver Propagation Delay tPLH, tPHL 400 1000 ns CL = 15 pF, see Figure 23 and Figure 26 4
Receiver Differential Skew tSKEW 255 ns CL = 15 pF, see Figure 23 and Figure 26 4
Receiver Enable Time tZH, tZL 5 50 ns RL = 1 kΩ, CL = 15 pF, see Figure 24 and Figure 28 (ADM4850 only) 4
Receiver Disable Time tLZ, tHZ 20 50 ns RL = 1 kΩ, CL = 15 pF, see Figure 24 and Figure 28 (ADM4850 only) 4
Receiver Enable Time from Shutdown 4000 ns RL = 1 kΩ, CL = 15 pF, see Figure 24 (ADM4850 only) 4
Time to Shutdown 50 330 3000 ns ADM4850 only; RE high and DE low 4
VCC to GND VCC 6 V 6
Digital Input/Output Voltage (DE, RE, DI, RO) -0.3 V Maximum VCC + 0.3 V 6
Driver Output/Receiver Input Voltage -9 14 V 6
Operating Temperature Range TA -40 85 °C 6
Storage Temperature Range -65 125 °C 6
Lead Temperature Soldering (10 sec) 300 °C 10 sec 6
Lead Temperature Vapor Phase (60 sec) 215 °C 60 sec 6
Lead Temperature Infrared (15 sec) 220 °C 15 sec 6
Supply Voltage Tolerance VCC -5 5 % VCC = 5 V ± 5% 3
Supply Voltage VCC 5 V VCC = 5 V ± 5% 3
Maximum Data Rate (ADM4850) 115 kbps 4
DE Input Resistance to GND 220 kΩ 3
Input Hysteresis 20 mV −7 V < VOC < +12 V 3
Thermal Impedance, 8-Lead SOIC θJA 110 °C/W 8-Lead SOIC 6

CAD (KiCad official)

  • Symbol: ADM4850ARZ-REEL7
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: adm4850arz-reel7-etched.step / adm4850arz-reel7-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); adm4850arz-reel7.step / adm4850arz-reel7.glb are the bare package body.

Provenance

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

  • Datasheet: Analog Devices datasheet (16 pp, sha256 cdda52bf95925c41, retrieved 2026-11-02, 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