component
BSP48520AS
Public Made by Adomby adom
BORN RS-485 / RS-422 ICs, SOIC-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
markdownBSP48520AS
BORN · RS-485 / RS-422 ICs · SOIC-8
BSP48520AS from BORN, 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 data output; it goes high when VID is above VTH+ and low when VID is below VTH-, and it is high-Z when REB is high or open. |
| 2 | REB | input | Active-low receiver enable with an internal pull-up; driving it high or leaving it open disables the receiver and puts RO in high-Z. |
| 3 | DE | input | Active-high driver enable with an internal pull-down to GND; when DE is low or open the A and B outputs are high-Z and the driver is disabled. |
| 4 | DI | input | Driver data input with an internal pull-up to VCC; a high level drives A high and B low when the driver is enabled, and a floating input with DE high drives A high and B low. |
| 5 | GND | power_in | Ground reference for all device voltages; all voltages are referenced to GND. |
| 6 | A | bidirectional | Bus I/O port (non-inverting RS-485 line); bus voltage range is -7 V to 12 V with an absolute maximum of -8 V to 13 V. |
| 7 | B | bidirectional | Bus I/O port (inverting RS-485 line); bus voltage range is -7 V to 12 V with an absolute maximum of -8 V to 13 V. |
| 8 | VCC | power_in | Supply pin; recommended supply range is 3.0 V to 5.5 V (5.0 V typical) referenced to GND, with a 100 nF to 220 nF decoupling capacitor placed as close to the pin as possible. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | BORN |
| 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 (RL=60Ω, -7V≤Vtest≤12V) | /VOD/ | 1.5 | 3.2 | V | RL = 60Ω,-7V≤Vtest≤12V, 图 17 | 4 | |
| Differential output voltage (4.5V≤VCC≤5.5V) | /VOD/ | 2.1 | 3.2 | V | RL = 60Ω,-7V≤Vtest≤ 12V, 4.5V≤VCC≤5.5V, 图 17 | 4 | |
| Differential output voltage (RL=100Ω) | /VOD/ | 2 | 4.2 | V | RL = 100Ω, CL = 50pF, 图 18 | 4 | |
| Differential output voltage (RL=54Ω) | /VOD/ | 1.5 | 3.6 | V | RL = 54Ω ,CL = 50pF, 图 18 | 4 | |
| Differential output voltage change | /ΔVOD/ | -50 | 50 | mV | RL = 54Ω 或 100Ω, CL = 50pF, 图 18 | 4 | |
| Common-mode output voltage | VOC | 1 | 3.3 | V | RL = 54Ω 或 100Ω ,CL = 50pF, 图 18 | 4 | |
| Steady-state common-mode output voltage change | ΔVOC(SS) | -50 | 50 | mV | 4 | ||
| Driver short-circuit output current | /IOS/ | 100 | 150 | mA | DE = VCC, -7V≤VO ≤ 12V 或 A 和 B 短接 | 4 | |
| Bus input current (VI=12V or 5.5V) | II | 75 | 125 | uA | DE=0,VCC=0V, VI=12V or 5.5V | 4 | |
| Bus input current (VI=-7V) | II | -100 | -40 | uA | DE=0,VCC=0V, VI=-7V | 4 | |
| Bus input impedance | RI | 96 | kΩ | VA = -7V,VB =12V 或 VA =12V,VB=-7V | 4 | ||
| Positive input threshold voltage | VTH+ | -110 | -50 | mV | 4 | ||
| Negative input threshold voltage | VTH− | -200 | -140 | mV | 4 | ||
| Output low voltage | VOL | 0.2 | 0.4 | V | IOH=4mA | 4 | |
| High-impedance output current | IOZR | -1 | 1 | uA | REB=VCC,VO=0V 或 VCC | 4 | |
| Receiver short-circuit output current | IOSR | 95 | mA | REB=DE=0V, 图 19 | 4 | ||
| Input current (DI, DE, REB) | IIN | -5 | 5 | uA | 0V≤VIN ≤ VCC | 4 | |
| Static operating current (driver and receiver enabled) | ICC | 0.9 | 1.4 | mA | 驱动器和接收机使能, REB=0V ,DE=VCC, 空载 | 4 | |
| Static operating current (driver enabled, receiver disabled) | ICC | 0.55 | 0.9 | mA | 驱动器使能, 接收机关闭, REB =VCC, DE=VCC, 空载 | 4 | |
| Static operating current (driver disabled, receiver enabled) | ICC | 0.5 | 0.8 | mA | 驱动器关闭, 接收机使能, REB =0V,DE=0V, 空载 | 4 | |
| Static operating current (driver and receiver disabled) | ICC | 5 | uA | 驱动器关闭, 接收机关闭, REB =VCC,DE = 0V, 空载 | 4 | ||
| Driver differential output rise/fall time (BSP48520A) | tf,tr | 5 | 12 | ns | RL=54Ω, CL=50pF, 图 20 | 5 | |
| Driver propagation delay (BSP48520A) | tPHL,tPLH | 12 | 25 | ns | 5 | ||
| Driver pulse width distortion (BSP48520A) | tSK(P) | 3.5 | 5 | ||||
| Driver disable time (BSP48520A) | tPHZ,tPLZ | 10 | 30 | ns | 图 21, 图 22 | 5 | |
| Driver enable time (REB=0V, BSP48520A) | tPZH,tPZL | 300 | 800 | ns | REB = 0V, 图 21, 图 22 | 5 | |
| Driver enable time (REB=VCC, BSP48520A) | tPZH,tPZL | 6 | 12 | us | REB = VCC, 图 21, 图 22 | 5 | |
| Receiver output rise/fall time (BSP48520A) | tf,tr | 4 | 8 | ns | CL=15pF, 图 23 | 5 | |
| Receiver propagation delay (BSP48520A) | tPHL,tPLH | 40 | 80 | ns | 5 | ||
| Receiver pulse width distortion (BSP48520A) | tSK(P) | 12 | 5 | ||||
| Receiver disable time (BSP48520A) | tPHZ,tPLZ | 7 | 20 | ns | 图 24 | 5 | |
| Receiver enable time (DE=VCC, BSP48520A) | tPZH(1) | 30 | 70 | ns | DE =VCC, 图 24, 图 25 | 5 | |
| Receiver enable time (DE=0V, BSP48520A) | tPZL(1) | 6 | 12 | DE=0V, 图 24, 图 25 | 5 | ||
| Receiver enable time (BSP48520A) | tPZH(2) | 6 | 12 | us | 5 | ||
| Receiver enable time (BSP48520A) | tPZL(2) | 6 | 12 | 5 | |||
| Supply voltage, referenced to GND | VCC | 3 | 5 | 5.5 | V | 3 | |
| Bus input voltage | VIN | -7 | 12 | V | 3 | ||
| High-level input threshold | VIH | 2 | V | 3 | |||
| Low-level input threshold | VIL | 0 | 0.8 | V | 3 | ||
| Differential load resistance | RL | 54 | Ω | 3 | |||
| Data rate (BSP48520Ax) | 1/tUI | 20 | Mbps | 3 | |||
| Operating ambient temperature | TA | -40 | 125 | ◦C | 3 | ||
| Operating junction temperature | TJ | -40 | 150 | ◦C | 3 | ||
| Supply voltage, referenced to GND | VCC | -0.5 | 7 | V | 3 | ||
| Bus voltage A, B | VIO | -8 | 13 | V | 3 | ||
| Voltage difference between bus A and B | VIO_DIF | -8 | 13 | V | 3 | ||
| Logic input voltage (DI, DE, REB) | VIO | -0.3 | V | 3 | |||
| Logic output voltage (RO) | VIO | -0.3 | V | 3 | |||
| Junction temperature | TJ | 150 | ◦C | 3 | |||
| Storage temperature | TSTG | -65 | 150 | ◦C | 3 | ||
| Junction-to-ambient thermal resistance | RθJA | 120 | ◦C/W | SOIC8 | 3 |
CAD (KiCad official)
- Symbol:
BSP48520AS - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
bsp48520as-etched.step/bsp48520as-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bsp48520as.step/bsp48520as.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: BORN datasheet (17 pp, sha256
ccd8bdc05aa594f5, retrieved 2026-10-18, 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), 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).