component
CA-IF4850HM
Public Made by Adomby adom
Chipanalog RS-485 / RS-422 ICs, MSOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownCA-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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ca-if4850hm.step/ca-if4850hm.glbare 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, primaryclaude-haiku-5-5(text), consensusclaude-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).