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BSP48520AS

Public Made by Adom

by adom

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

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BSP48520AS

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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bsp48520as.step / bsp48520as.glb are 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, 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