component
BSP48505AS
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.
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BSP48505AS
BORN · RS-485 / RS-422 ICs · SOIC-8
BSP48505AS 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: goes high when VID is above VTH+ and low when VID is below VTH−, with VOH of at least VCC-0.5 V at IOH=-4 mA and VOL of at most 0.4 V at 4 mA, and it holds high (fail-safe) on an open, shorted or idle bus. |
| 2 | REB | input | Receiver enable, active low with an internal resistor pull-up; driving it high or leaving it open puts RO in high impedance, and VIH must be at least 2.0 V with VIL at most 0.8 V. |
| 3 | DE | input | Driver enable, active high with an internal pull-down to GND; when low (or open) the driver outputs A and B are high impedance, with logic thresholds VIH at least 2.0 V and VIL at most 0.8 V. |
| 4 | DI | input | Driver data input with an internal pull-up to VCC; when the driver is enabled a high level drives A high and B low, with logic thresholds VIH at least 2.0 V and VIL at most 0.8 V. |
| 5 | GND | power_in | Ground reference for all device voltages; all voltage limits in the datasheet are referenced to GND. |
| 6 | A | bidirectional | RS-485 bus non-inverting input/output; bus input voltage range is -7 V to 12 V, with absolute maximum bus voltage of -8 V to 13 V. |
| 7 | B | bidirectional | RS-485 bus inverting input/output; bus input voltage range is -7 V to 12 V, with absolute maximum bus voltage of -8 V to 13 V. |
| 8 | VCC | power_in | Supply pin with recommended range 3.0 V to 5.5 V referenced to GND; a 100 nF to 220 nF decoupling capacitor should be placed as close to this 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 |
|---|---|---|---|---|---|---|---|
| Supply voltage | VCC | -0.5 | 7 | V | 3 | ||
| Bus voltage A, B | VIO | -8 | 13 | V | 3 | ||
| Differential voltage 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 | ||
| 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: BSP48505Ax | 1/tUI | 0.5 | Mbps | 3 | |||
| Operating ambient temperature | TA | -40 | 125 | ◦C | 3 | ||
| Operating junction temperature | TJ | -40 | 150 | ◦C | 3 | ||
| Junction-to-ambient thermal resistance (SOIC8) | RθJA | 120 | ◦C/W | 3 | |||
| Differential output voltage | /VOD/ | 1.5 | 3.2 | V | RL = 60Ω,-7V≤Vtest≤12V, 图 17 | 4 | |
| Differential output voltage | /VOD/ | 2.1 | 3.2 | V | RL = 60Ω,-7V≤Vtest≤ 12V, 4.5V≤VCC≤5.5V, 图 17 | 4 | |
| Differential output voltage | /VOD/ | 2 | 4.2 | V | RL = 100Ω, CL = 50pF, 图 18 | 4 | |
| Differential output voltage | /VOD/ | 1.5 | 3.6 | V | RL = 54Ω ,CL = 50pF, 图 18 | 4 | |
| Differential output voltage change | /∆VOD/ | -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 | ∆VOC(SS) | -50 | 50 | mV | 4 | ||
| Common-mode output voltage change, peak-to-peak | VOC(PP) | 450 | 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 | II | 75 | 125 | uA | DE=0, VCC=0V, VI=12V or 5.5V | 4 | |
| Bus input current | 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-going input threshold voltage | VTH+ | -110 | -50 | mV | 4 | ||
| Negative-going input threshold voltage | VTH− | -200 | -140 | mV | 4 | ||
| Output low-level 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 | |
| Hysteresis voltage | VHYS | 30 | mV | 4 | |||
| Static supply current, driver and receiver enabled | ICC | 0.9 | 1.4 | mA | REB=0V, DE=VCC, 空载 | 4 | |
| Static supply current, driver enabled, receiver off | ICC | 0.55 | 0.9 | mA | REB=VCC, DE=VCC, 空载 | 4 | |
| Static supply current, driver off, receiver enabled | ICC | 0.5 | 0.8 | mA | REB=0V,DE=0V, 空载 | 4 | |
| Static supply current, driver and receiver off | ICC | 5 | uA | REB=VCC,DE = 0V, 空载 | 4 | ||
| Thermal shutdown temperature | TSD | 170 | ◦C | 4 | |||
| Thermal shutdown hysteresis | TSD | 20 | ◦C | 4 | |||
| Differential output rise/fall time (BSP48505A) | tf,tr | 150 | 500 | ns | RL=54Ω, CL=50pF, 图 20 | 5 | |
| Driver propagation delay (BSP48505A) | tPHL,tPLH | 100 | 250 | ns | 5 | ||
| Driver pulse skew (BSP48505A) | tSK(P) | 10 | ns | /tPHL − tPLH/ | 5 | ||
| Driver disable time (BSP48505A) | tPHZ,tPLZ | 10 | 30 | ns | 图 21, 图 22 | 5 | |
| Driver enable time, REB = 0V (BSP48505A) | tPZH,tPZL | 300 | 800 | ns | REB = 0V, 图 21, 图 22 | 5 | |
| Driver enable time, REB = VCC (BSP48505A) | tPZH,tPZL | 6 | 12 | us | REB = VCC, 图 21, 图 22 | 5 | |
| Receiver output rise/fall time (BSP48505A) | tf,tr | 10 | 20 | ns | CL=15pF, 图 23 | 5 | |
| Receiver propagation delay (BSP48505A) | tPHL,tPLH | 50 | 100 | ns | 5 | ||
| Receiver pulse skew (BSP48505A) | tSK(P) | 7 | ns | /tPHL, tPLH/ | 5 | ||
| Receiver disable time (BSP48505A) | tPHZ,tPLZ | 30 | 60 | ns | 图 24 | 5 | |
| Receiver enable time, DE = VCC (BSP48505A) | tPZH(1) | 50 | 100 | ns | DE =VCC, 图 24, 图 25 | 5 | |
| Receiver enable time, DE = 0V (BSP48505A) | tPZL(1) | 6 | 12 | us | DE=0V, 图 24, 图 25 | 5 | |
| Receiver enable time (BSP48505A) | tPZH(2) | 6 | 12 | us | 5 |
CAD (KiCad official)
- Symbol:
BSP48505AS - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
bsp48505as-etched.step/bsp48505as-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bsp48505as.step/bsp48505as.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: BORN datasheet (17 pp, sha256
37573193852eb85d, retrieved 2026-10-19, 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).
# BSP48505AS
**BORN** · RS-485 / RS-422 ICs · SOIC-8
BSP48505AS 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: goes high when VID is above VTH+ and low when VID is below VTH−, with VOH of at least VCC-0.5 V at IOH=-4 mA and VOL of at most 0.4 V at 4 mA, and it holds high (fail-safe) on an open, shorted or idle bus. |
| 2 | REB | input | Receiver enable, active low with an internal resistor pull-up; driving it high or leaving it open puts RO in high impedance, and VIH must be at least 2.0 V with VIL at most 0.8 V. |
| 3 | DE | input | Driver enable, active high with an internal pull-down to GND; when low (or open) the driver outputs A and B are high impedance, with logic thresholds VIH at least 2.0 V and VIL at most 0.8 V. |
| 4 | DI | input | Driver data input with an internal pull-up to VCC; when the driver is enabled a high level drives A high and B low, with logic thresholds VIH at least 2.0 V and VIL at most 0.8 V. |
| 5 | GND | power_in | Ground reference for all device voltages; all voltage limits in the datasheet are referenced to GND. |
| 6 | A | bidirectional | RS-485 bus non-inverting input/output; bus input voltage range is -7 V to 12 V, with absolute maximum bus voltage of -8 V to 13 V. |
| 7 | B | bidirectional | RS-485 bus inverting input/output; bus input voltage range is -7 V to 12 V, with absolute maximum bus voltage of -8 V to 13 V. |
| 8 | VCC | power_in | Supply pin with recommended range 3.0 V to 5.5 V referenced to GND; a 100 nF to 220 nF decoupling capacitor should be placed as close to this 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 |
|---|---|---|---|---|---|---|---|
| Supply voltage | VCC | -0.5 | | 7 | V | | 3 |
| Bus voltage A, B | VIO | -8 | | 13 | V | | 3 |
| Differential voltage 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 |
| 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: BSP48505Ax | 1/tUI | | | 0.5 | Mbps | | 3 |
| Operating ambient temperature | TA | -40 | | 125 | ◦C | | 3 |
| Operating junction temperature | TJ | -40 | | 150 | ◦C | | 3 |
| Junction-to-ambient thermal resistance (SOIC8) | RθJA | | 120 | | ◦C/W | | 3 |
| Differential output voltage | /VOD/ | 1.5 | 3.2 | | V | RL = 60Ω,-7V≤Vtest≤12V, 图 17 | 4 |
| Differential output voltage | /VOD/ | 2.1 | 3.2 | | V | RL = 60Ω,-7V≤Vtest≤ 12V, 4.5V≤VCC≤5.5V, 图 17 | 4 |
| Differential output voltage | /VOD/ | 2 | 4.2 | | V | RL = 100Ω, CL = 50pF, 图 18 | 4 |
| Differential output voltage | /VOD/ | 1.5 | 3.6 | | V | RL = 54Ω ,CL = 50pF, 图 18 | 4 |
| Differential output voltage change | /∆VOD/ | -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 | ∆VOC(SS) | -50 | | 50 | mV | | 4 |
| Common-mode output voltage change, peak-to-peak | VOC(PP) | | 450 | | 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 | II | | 75 | 125 | uA | DE=0, VCC=0V, VI=12V or 5.5V | 4 |
| Bus input current | 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-going input threshold voltage | VTH+ | | -110 | -50 | mV | | 4 |
| Negative-going input threshold voltage | VTH− | -200 | -140 | | mV | | 4 |
| Output low-level 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 |
| Hysteresis voltage | VHYS | | 30 | | mV | | 4 |
| Static supply current, driver and receiver enabled | ICC | | 0.9 | 1.4 | mA | REB=0V, DE=VCC, 空载 | 4 |
| Static supply current, driver enabled, receiver off | ICC | | 0.55 | 0.9 | mA | REB=VCC, DE=VCC, 空载 | 4 |
| Static supply current, driver off, receiver enabled | ICC | | 0.5 | 0.8 | mA | REB=0V,DE=0V, 空载 | 4 |
| Static supply current, driver and receiver off | ICC | | | 5 | uA | REB=VCC,DE = 0V, 空载 | 4 |
| Thermal shutdown temperature | TSD | | 170 | | ◦C | | 4 |
| Thermal shutdown hysteresis | TSD | | 20 | | ◦C | | 4 |
| Differential output rise/fall time (BSP48505A) | tf,tr | | 150 | 500 | ns | RL=54Ω, CL=50pF, 图 20 | 5 |
| Driver propagation delay (BSP48505A) | tPHL,tPLH | | 100 | 250 | ns | | 5 |
| Driver pulse skew (BSP48505A) | tSK(P) | | | 10 | ns | /tPHL − tPLH/ | 5 |
| Driver disable time (BSP48505A) | tPHZ,tPLZ | | 10 | 30 | ns | 图 21, 图 22 | 5 |
| Driver enable time, REB = 0V (BSP48505A) | tPZH,tPZL | | 300 | 800 | ns | REB = 0V, 图 21, 图 22 | 5 |
| Driver enable time, REB = VCC (BSP48505A) | tPZH,tPZL | | 6 | 12 | us | REB = VCC, 图 21, 图 22 | 5 |
| Receiver output rise/fall time (BSP48505A) | tf,tr | | 10 | 20 | ns | CL=15pF, 图 23 | 5 |
| Receiver propagation delay (BSP48505A) | tPHL,tPLH | | 50 | 100 | ns | | 5 |
| Receiver pulse skew (BSP48505A) | tSK(P) | | | 7 | ns | /tPHL, tPLH/ | 5 |
| Receiver disable time (BSP48505A) | tPHZ,tPLZ | | 30 | 60 | ns | 图 24 | 5 |
| Receiver enable time, DE = VCC (BSP48505A) | tPZH(1) | | 50 | 100 | ns | DE =VCC, 图 24, 图 25 | 5 |
| Receiver enable time, DE = 0V (BSP48505A) | tPZL(1) | | 6 | 12 | us | DE=0V, 图 24, 图 25 | 5 |
| Receiver enable time (BSP48505A) | tPZH(2) | | 6 | 12 | us | | 5 |
## CAD (KiCad official)
- Symbol: `BSP48505AS`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `bsp48505as-etched.step` / `bsp48505as-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bsp48505as.step` / `bsp48505as.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [BORN datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603358150183428096) (17 pp, sha256 `37573193852eb85d`, retrieved 2026-10-19, 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](docs/bsp48505as-datasheet.pdf)