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CA-IF4850HM

Public Made by Adom

by adom

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

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CA-IF4850HM

Chipanalog · RS-485 / RS-422 ICs · MSOP-8

CA-IF4850HM from Chipanalog, 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 RO output Receiver output: RO goes high when VA-VB > VTH+ and low when VA-VB < VTH- while REB is low, and is high-impedance when REB is high.
2 REB input Active-low receiver enable: the receiver is enabled when REB is low or tied to GND, and its output is high-impedance when REB is high; REB is internally pulled up to VCC.
3 DE input Active-high driver enable: the driver is enabled when DE is high, and A and B are high-impedance when DE is low or open; DE has an internal pull-down.
4 DI input Driver data input: with DE high, DI high drives A high and B low, and DI low drives A low and B high; DI is internally pulled up to VCC.
5 GND power_in Ground reference for the device.
6 A bidirectional RS-485/RS-422 bus non-inverting receiver input and driver output; bus voltage range is ±30 V fault-protected and common-mode range is ±15 V.
7 B bidirectional RS-485/RS-422 bus inverting receiver input and driver output; bus voltage range is ±30 V fault-protected and common-mode range is ±15 V.
8 VCC power_in Supply input for 3.0 V to 5.5 V operation; a bypass capacitor of at least 0.1 µF should be placed close to this pin between VCC and GND.

Key specifications

Parameter Value
Manufacturer Chipanalog
Package MSOP-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
Supply voltage VCC -0.3 7 V 6
Bus terminal voltage A,B,Z,Y VIO -30 30 V 6
Logic input voltage DI,DE,REB VIO -0.3 7 V 6
Logic output voltage RO VIO -0.3 V max printed as VCC+0.3 V 6
Junction temperature TJ 150 °C 6
Storage temperature range TSTG -65 150 °C 6
Analog supply voltage VCC 3 5.5 V typ printed as 3.3/5.0 6
Bus input voltage VIN -15 15 V 6
Low-level input threshold VIL 0 0.8 V 6
High-level input threshold VIH 2 V max printed as VCC 6
Differential load resistance RL 54 Ohm 6
Data rate CA-IF4850 1/tUI 50 Mbps 6
Ambient temperature TA -40 125 °C 6
Junction temperature operating TJ -40 150 °C 6
Bus output differential voltage /VOD/ 1 1.5 2.4 V VCC=3.3V, RL=60 Ohm, -15 V ≤ Vtest ≤ 15 V (Fig 8-1) 7
Bus output differential voltage /VOD/ 2.1 V RL=60 Ohm, -15 V ≤ Vtest ≤ 15 V, 4.5 V ≤ VCC ≤ 5.5 V (Fig 8-1) 7
Bus output differential voltage /VOD/ 2 4 V VCC=5.0V, RL = 100 Ohm (Fig 8-2) 7
Bus output differential voltage /VOD/ 1.5 2.7 V VCC=3.3V, RL = 100 Ohm (Fig 8-2) 7
Bus output differential voltage /VOD/ 1.5 3.7 V VCC=5.0V, RL = 54 Ohm (Fig 8-2) 7
Bus output differential voltage /VOD/ 1.5 2.4 V VCC=3.3V, RL = 54 Ohm (Fig 8-2) 7
Change in differential output voltage Δ/VOD/ -200 200 mV VCC=3.3V/5.0V, RL = 54 Ohm (Fig 8-2) 7
Common-mode output voltage VOC 1 3 V 7
Change in common-mode output voltage ΔVOC(SS) -200 200 mV 7
Short-circuit output current IOS -250 250 mA VCC=3.3V/5.0V, -7 V ≤ VO ≤ 12 V 7
Bus input current II 75 125 µA DE = 0 V, VCC = 0V/3.3V/5.0V, VI = 12V 7
Bus input current II -100 -43 µA DE = 0 V, VCC = 0V/3.3V/5.0V, VI = -7V 7
Bus input current II 91 125 µA DE = 0 V, VCC = 0V/3.3V/5.0V, VI = 15V 7
Bus input current II -200 -97 µA DE = 0 V, VCC = 0V/3.3V/5.0V, VI = -15V 7
High-level input threshold VTH+ -100 -20 mV VCC = 3.3V/5.0V, common-mode voltage range 7
Low-level input threshold VTH- -200 -130 mV 7
Input hysteresis voltage VHYS 30 mV 7
Low-level output voltage VOL 0.2 0.4 V VCC = 3.3V/5.0V, IOL = 4 mA 7
High-impedance output leakage current IOZR -1 1 µA VCC = 3.3V/5.0V, VO = 0 V or VCC, REB= VCC 7
Logic input current IIN -6.2 6.2 µA 3 V ≤ VCC ≤ 5.5 V, 0 V ≤ VIN ≤ VCC 7
Operating supply current (static) ICC 0.4 1.2 mA VCC=5.0V, driver and receiver enabled, REB=0V, DE = VCC, no load; typ printed 0.8 7
Operating supply current (static) ICC 0.7 1.1 mA VCC=3.3V, driver and receiver enabled, REB=0V, DE = VCC, no load 7
Operating supply current (static) ICC 0.8 1.2 mA VCC=5.0V, driver enabled, receiver off, REB=VCC, DE = VCC, no load 7
Operating supply current (static) ICC 700 960 µA VCC=5.0V, driver off, receiver enabled, REB=0V, DE = 0V, no load 7
Operating supply current (shutdown) ICC 2.9 5 µA VCC=5.0V, driver off, receiver off, REB=VCC, DE = 0V, DI=open, no load 7
Operating supply current (shutdown) ICC 1.6 3 µA VCC=3.3V, driver off, receiver off, REB=VCC, DE = 0V, DI=open, no load 7
Driver rise/fall time tr, tf 1 3 6 ns VCC=3.3 V/5.0 V, RL = 54 Ohm, CL = 50 pF (Fig 8-3) 8
Driver propagation delay tPHL,tPLH 3 10 20 ns VCC=3.3 V/5.0 V, RL = 54 Ohm, CL = 50 pF (Fig 8-3) 8
Driver pulse width distortion tSK(P) 3.5 ns /tPHL, tPLH/, VCC=3.3 V/5.0 V 8
Driver disable time tPHZ,tPLZ 15 25 ns VCC=3.3 V/5.0 V (Fig 8-4, 8-5) 8
Driver enable time (RE = 0 V) tPZH,tPZL 20 50 ns RE = 0 V, VCC=3.3 V/5.0 V (Fig 8-4, 8-5) 8
Driver enable time (RE = VCC) tPZH,tPZL 2.5 10 µs RE = VCC, VCC=3.3 V/5.0 V (Fig 8-4, 8-5) 8
Receiver rise/fall time tr, tf 3.8 10 ns VCC=3.3 V/5.0 V, CL = 15 pF (Fig 8-6) 8
Receiver propagation delay tPHL,tPLH 23 110 ns VCC=3.3 V/5.0 V, CL = 15 pF (Fig 8-6) 8
Receiver pulse width distortion tSK(P) 7 ns /tPHL, tPLH/, VCC=3.3 V/5.0 V 8
Receiver disable time tPHZ, tPLZ 7 20 ns VCC=3.3 V/5.0 V (Fig 8-7, 8-8) 8
Receiver enable time (DE = VCC) tPZH(1),tPZL(1),tPZH(2),tPZL(2) 8 20 ns DE = VCC, VCC=3.3 V/5.0 V (Fig 8-7, 8-8) 8
Receiver enable time (DE = 0 V) tPZH(1),tPZL(1),tPZH(2),tPZL(2) 7 14 µs DE = 0 V, VCC=3.3 V/5.0 V (Fig 8-7, 8-8) 9
Thermal resistance junction to ambient (MSOP8) RθJA 160 °C/W IC junction-to-ambient 6
Thermal shutdown temperature TSD 180 ℃ 7

CAD (KiCad official)

  • Symbol: CA-IF4850HM
  • Footprint: Package_SO:MSOP-8_3x3mm_P0.65mm
  • 3D model: MSOP-8 (KiCad packages3D, STEP)
  • 3D model files: ca-if4850hm-etched.step / ca-if4850hm-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ca-if4850hm.step / ca-if4850hm.glb are the bare package body.

Provenance

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

  • Datasheet: Chipanalog datasheet (24 pp, sha256 d2cc24cdb3826f33, retrieved 2026-10-27, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed (audit)), 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