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COS485RS

Public Made by Adom

by adom

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

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COS485RS

COSINE · RS-485/RS-422 ICs · SOP-8

COS485RS from COSINE, in a SOP-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 RE is low, RO is high if A > B by 200mV and low if A < B by 200mV; high impedance when RE is high.
2 RE input Receiver output enable: a low enables the receiver output RO, a high forces RO into a high impedance state.
3 DE input Driver output enable: a high enables driver outputs A and B (line driver), a low forces them high impedance (line receiver).
4 DI input Driver input: with DE high, a low on DI forces A low and B high, and a high on DI forces A high and B low.
5 GND power_in Ground.
6 A bidirectional Non-inverting receiver input and non-inverting driver output, with -7V to 12V common mode range and ±8 kV IEC-ESD contact protection.
7 B bidirectional Inverting receiver input and inverting driver output, with -7V to 12V common mode range and ±8 kV IEC-ESD contact protection.
8 VCC power_in Power supply, 3.0V to 5.5V recommended operating range (7V absolute maximum).

Key specifications

Parameter Value
Manufacturer COSINE
Package SOP-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
DC supply voltage Vcc 7 V 4
Control input voltages -0.5 5.5 V Max printed as Vcc + 0.5 4
Driver output voltage at A or B -14 14 V ±14 4
Receiver input voltage -14 14 V ±14 4
Operating junction temperature (abs max) -40 135 °C 4
Storage temperature -55 150 °C 4
Package thermal resistance SOP8 150 °C/W SOP8 4
DC supply voltage Vcc 3 5.5 V 4
Input voltage at any bus terminal -7 12 V 4
Differential input voltage -12 12 V 4
Differential load resistance 54 60 Ω 4
Data rate 0 10 Mbps 4
Operating ambient temperature -40 85 °C 4
Operating junction temperature -40 125 °C 4
Differential driver output (no load) VOD1 3 3.5 V IO = 0 5
Differential driver output (with load) RS422 VOD2 2 2.5 V RL = 50Ω (RS422) 5
Differential driver output (with load) RS485 VOD2 1.5 2 V RL = 27Ω (RS485), Figure 2 5
Change in magnitude of driver differential output voltage ΔVOD -0.2 0 0.2 V RL = 27Ω or 50Ω 5
Driver common-mode output voltage VOC 1 2.4 3 V RL = 27Ω or 50Ω 5
Change in magnitude of driver common-mode output voltage ΔVOC 0.2 V RL = 27Ω or 50Ω 5
Driver short-circuit current IOS -250 250 mA VO = -7V to 12V 5
Logic input high voltage VIH 2 V RE, DE, DI 5
Logic input low voltage VIL 0.8 V RE, DE, DI 5
Logic input current IIN1 -5 5 μA RE, DE, DI 5
Receiver differential threshold voltage VTH -200 -125 -50 mV VCM = -7V to 12V 5
Receiver input hysteresis ΔVTH 15 mV VCM = 0V 5
Receiver input resistance RIN 100 kΩ VCM = -7V to 12V 5
Input current (A, B) IIN -0.3 0.3 mA VCC = 0V or 5V, VDE = 0V, VIN = 12V / VIN = -7V 5
Receiver output high voltage VOH 4 4.6 V IO = -8mA, VID = 200mV 5
Receiver output low voltage VOL 0.2 0.4 V IO = -8mA, VID = 200mV 5
Receiver output short-circuit current IOSR 7 30 mA VRO = 0V to Vcc 5
Tristate output leakage current IOZR -1 1 μA VRO = 0.4 to 2.4V 5
Supply current ICC 330 500 μA No Load, DE= VCC, RE = 0 6
Supply current ICC 36 50 μA No Load, DE= VCC, RE = VCC 6
Supply current ICC 350 550 μA No Load, DE= 0, RE = 0 6
Shutdown current ISHDN 2 μA DE= 0, RE = VCC 6
Thermal shut-down junction temperature TSH 170 °C 6
Thermal shut-down hysteresis TSHY 30 °C 6
Driver propagation delay tPLH 3 5 10 ns RDIFF = 54Ω, CL1 = CL2 = 100pF 6
Driver output to output skew tSK 2 5 ns RDIFF = 54Ω, CL1 = CL2 = 100pF 6
Driver rise or fall time tr, tf 3 6 10 ns RDIFF = 54Ω, CL1 = CL2 = 100pF 6
Driver enable to output high tPZH 5 10 ns CL = 100pF, S2 = Closed 6
Driver enable to output low tPZL 5 10 ns CL = 100pF, S1 = Closed 6
Driver disable time from low tPLZ 8 15 ns CL = 15pF, S1 = Closed 6
Driver disable time from high tPHZ 8 15 ns CL = 15pF, S2 = Closed 6
Receiver propagation delay tPLH 30 105 150 ns RDIFF = 54Ω, CL1 = CL2 = 100pF 7
Receiver output to output skew tSK 10 ns RDIFF = 54Ω, CL1 = CL2 = 100pF 7
Receiver enable to output high tPZH 50 70 ns CRL = 15pF, S1 = Closed 7
Receiver enable to output low tPZL 50 70 ns CRL = 15pF, S2 = Closed 7
Receiver disable time from low tPLZ 50 70 ns CRL = 15pF, S1 = Closed 7
Receiver disable time from high tPHZ 50 70 ns CRL = 15pF, S2 = Closed 7
Maximum data rate fMAX 10 Mbps 7

CAD (KiCad official)

  • Symbol: COS485RS
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: cos485rs-etched.step / cos485rs-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cos485rs.step / cos485rs.glb are the bare package body.

Provenance

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

  • Datasheet: COSINE datasheet (12 pp, sha256 ec80090158e6c3aa, retrieved 2026-10-23, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-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