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ADM3485ARZ-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.

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Contents

README

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ADM3485ARZ-REEL7

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

ADM3485ARZ-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 the receiver is enabled, RO goes high if A is more than 200 mV above B and goes low if A is more than 200 mV below B.
2 RE input Receiver output enable: a low level enables RO and a high level places it in high impedance, and RE high with DE low puts the device into low-power shutdown.
3 DE input Driver output enable: a high level enables the driver differential outputs A and B and a low level places them in high impedance, and RE high with DE low puts the device into low-power shutdown.
4 DI input Driver input: when the driver is enabled, a logic low forces A low and B high while a logic high forces A high and B low.
5 GND power_in Ground reference for the device; the datasheet gives no further limits for this pin.
6 A bidirectional Noninverting receiver input and noninverting driver output A, with 12 kΩ receiver input resistance over the −7 V to +12 V common-mode range.
7 B bidirectional Inverting receiver input and inverted driver output B, with 12 kΩ receiver input resistance over the −7 V to +12 V common-mode range.
8 VCC power_in Power supply, specified at 3.3 V ± 0.3 V (absolute maximum VCC to GND is 7 V).

Key specifications

Parameter Value
Manufacturer Analog Devices
Package SOIC-8
Category Interface
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, RL = 100 Ω) VOD 2 V RL = 100 Ω (RS-422), VCC = 3.3 V ± 5% (see Figure 17) 4
Differential Output Voltage (RS-485, RL = 54 Ω) VOD 1.5 V RL = 54 Ω (RS-485) (see Figure 17) 4
Differential Output Voltage (RS-485, RL = 60 Ω) VOD 1.5 V RL = 60 Ω (RS-485), VCC = 3.3 V (see Figure 18) 4
Δ /VOD/ for Complementary Output States Δ/VOD/ 0.2 V RL = 54 Ω or 100 Ω (see Figure 17) 4
Common-Mode Output Voltage VOC 3 V RL = 54 Ω or 100 Ω (see Figure 17) 4
Δ /VOC/ for Common-Mode Output Voltage Δ/VOC/ 0.2 V RL = 54 Ω or 100 Ω (see Figure 17) 4
CMOS Input Logic Threshold Low VIL 0.8 V DE, DI, RE 4
CMOS Input Logic Threshold High VIH 2 V DE, DI, RE 4
CMOS Logic Input Current IIN1 -2 2 μA DE, DI, RE 4
Input Current, A, B (VIN = 12 V) IIN2 1 mA VIN = 12 V, DE = 0 V, VCC = 0 V or 3.6 V 4
Input Current, A, B (VIN = −7 V) IIN2 -0.8 mA VIN = −7 V, DE = 0 V, VCC = 0 V or 3.6 V 4
Differential Input Threshold Voltage VTH -0.2 0.2 V −7 V < VCM < +12 V 4
CMOS Output Voltage Low VOL 0.4 V IOUT = 2.5 mA, VID = 200 mV (see Figure 19) 4
Three-State Output Leakage Current IOZR -1 1 μA VCC = 3.6 V, 0 V ≤ VOUT ≤ VCC 4
Input Resistance RIN 12 kΩ −7 V < VCM < +12 V 4
Supply Current (DE = VCC) ICC 1.1 2.2 mA DE = VCC, RE = 0 V or VCC, no load, DI = 0 V or VCC 4
Supply Current (DE = 0 V) ICC 0.95 1.9 mA DE = 0 V, RE = 0 V, no load, DI = 0 V or VCC 4
Supply Current in Shutdown Mode ISHDN 0.002 1 μA DE = 0 V, RE = VCC, DI = VCC or 0 V 4
Driver Short-Circuit Output Current (VOUT = −7 V) IOSD -250 mA VOUT = −7 V 4
Driver Short-Circuit Output Current (VOUT = 12 V) IOSD 250 mA VOUT = 12 V 4
Receiver Short-Circuit Output Current IOSR -8 60 mA 0 V < VRO < VCC 4
Time to Shutdown (ADM3483/ADM3485/ADM3491) tSHDN 80 190 300 ns 6
Propagation Delay, Low-to-High Level (receiver) tRPLH 25 65 90 ns VID = 0 V to 3.0 V, CL = 15 pF (see Figure 24 and Figure 30) 6
Propagation Delay, High-to-Low Level (receiver) tRPHL 25 65 90 ns VID = 0 V to 3.0 V, CL = 15 pF (see Figure 24 and Figure 30) 6
/tPLH, tPHL/ Propagation Delay Skew (receiver) tRPDS 10 ns VID = 0 V to 3.0 V, CL = 15 pF (see Figure 24 and Figure 30) 6
Receiver Output Enable Time to Low Level tPRZL 25 50 ns CL = 15 pF (see Figure 25 and Figure 31) 6
Receiver Output Enable Time to High Level tPRZH 25 50 ns CL = 15 pF (see Figure 25 and Figure 31) 6
Receiver Output Disable Time from High Level tPRHZ 25 45 ns CL = 15 pF (see Figure 25 and Figure 31) 6
Receiver Output Disable Time from Low Level tPRLZ 25 45 ns CL = 15 pF (see Figure 25 and Figure 31) 6
Receiver Output Enable Time from Shutdown to Low Level tPRSL 720 1400 ns CL = 15 pF (see Figure 25 and Figure 31) 6
Receiver Output Enable Time from Shutdown to High Level tPRSH 720 1400 ns CL = 15 pF (see Figure 25 and Figure 31) 6
Differential Output Delay tDD 1 22 35 ns RL = 60 Ω (see Figure 20 and Figure 26) 5
Differential Output Transition Time tTD 3 8 25 ns RL = 60 Ω (see Figure 20 and Figure 26) 5
Propagation Delay, Low-to-High Level (driver) tPLH 7 22 35 ns RL = 27 Ω (see Figure 21 and Figure 27) 5
Propagation Delay, High-to-Low Level (driver) tPHL 7 22 35 ns RL = 27 Ω (see Figure 21 and Figure 27) 5
/tPLH, tPHL/ Propagation Delay Skew (driver) tPDS 8 ns RL = 27 Ω (see Figure 21 and Figure 27) 5
Driver Output Enable Time to Low Level tPZL 45 90 ns RL = 110 Ω (see Figure 23 and Figure 29) 5
Driver Output Enable Time to High Level tPZH 45 90 ns RL = 110 Ω (see Figure 22 and Figure 28) 5
Driver Output Disable Time from High Level tPHZ 40 80 ns RL = 110 Ω (see Figure 22 and Figure 28) 5
Driver Output Disable Time from Low Level tPLZ 40 80 ns RL = 110 Ω (see Figure 23 and Figure 29) 5
Driver Output Enable Time from Shutdown to Low Level tPSL 650 900 ns RL = 110 Ω (see Figure 23 and Figure 29) 5
Driver Output Enable Time from Shutdown to High Level tPSH 650 900 ns RL = 110 Ω (see Figure 22 and Figure 28) 5
Supply Voltage (ADM3485) VCC 3 3.6 V Table 1 supply voltage column for ADM3485 3
VCC to GND VCC 7 V 7
Digital I/O Voltage (DE, RE, DI) -0.3 6 V 7
Driver Output/Receiver Input Voltage -7.5 12.5 V 7
Operating Temperature Range TA -40 85 °C 7
Storage Temperature Range TSTG -65 125 °C 7
Lead Temperature Soldering 300 °C 10 sec 7
Lead Temperature Vapor Phase 215 °C 60 sec 7
Lead Temperature Infrared 220 °C 15 sec 7
Thermal Impedance θJA θJA 121 °C/W 8-Lead SOIC 7

CAD (KiCad official)

  • Symbol: ADM3485ARZ-REEL7
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: adm3485arz-reel7-etched.step / adm3485arz-reel7-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); adm3485arz-reel7.step / adm3485arz-reel7.glb are the bare package body.

Provenance

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

  • Datasheet: Analog Devices datasheet (20 pp, sha256 e7fcba7f9a3919f7, retrieved 2026-10-18, tier: lcsc)
  • 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