component
LTC1485CS8#TRPBF
Public Made by Adomby adom
Analog Devices RS-485/RS-422 ICs, SO-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdownLTC1485CS8#TRPBF
Analog Devices · RS-485/RS-422 ICs · SO-8
LTC1485CS8#TRPBF from Analog Devices, in a SO-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 is high when A exceeds B by 200mV and low when A is less than B by 200mV, while the receiver is enabled (RE low). |
| 2 | RE | input | Receiver output enable: a low enables RO, and a high forces RO into a high-impedance state. |
| 3 | DE | input | Driver output enable: a high enables the driver outputs A and B, and a low forces them into a high-impedance state. |
| 4 | DI | input | Driver input: when the driver is enabled (DE high), a low on DI forces A low and B high, and a high on DI forces A high and B low. |
| 5 | GND | power_in | Ground connection for the device; all voltages are referenced to this pin. |
| 6 | A | bidirectional | Driver output/receiver input (A); the bus common-mode range is -7V to 12V and the driver outputs are high-impedance when DE is low. |
| 7 | B | bidirectional | Driver output/receiver input (B); the bus common-mode range is -7V to 12V and the driver outputs are high-impedance when DE is low. |
| 8 | VCC | power_in | Positive supply; 4.75V ≤ VCC ≤ 5.25V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | SO-8 |
| Category | Communication Interface Chip/UART/485/232 |
| 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 | 12 | V | 2 | |||
| Control Input Voltages | -0.5 | V | max VCC + 0.5V as printed | 2 | |||
| Control Input Currents | -50 | 50 | mA | 2 | |||
| Driver Input Voltages | -0.5 | V | max VCC + 0.5V as printed | 2 | |||
| Driver Input Currents | -25 | 25 | mA | 2 | |||
| Driver Output Voltages | -14 | 14 | V | 2 | |||
| Receiver Input Voltages | -14 | 14 | V | 2 | |||
| Receiver Output Voltages | -0.5 | V | max VCC + 0.5V as printed | 2 | |||
| Operating Temperature Range LTC1485C | 0 | 70 | °C | LTC1485C grade, S8 package | 2 | ||
| Storage Temperature Range | -65 | 150 | °C | 2 | |||
| Lead Temperature | 300 | °C | Soldering, 10 sec. | 2 | |||
| Maximum Junction Temperature | TJMAX | 150 | °C | S package | 2 | ||
| Thermal Resistance Junction-to-Ambient | θJA | 150 | °C/W | S package | 2 | ||
| Supply Voltage Range | VCC | 4.75 | 5.25 | V | 6 | ||
| Differential Driver Output Voltage (Unloaded) | VOD1 | 5 | V | IO = 0 | 3 | ||
| Differential Driver Output Voltage (With Load, RS422) | VOD2 | 2 | V | R = 50Ω (RS422) (Figure 1) | 3 | ||
| Differential Driver Output Voltage (With Load, RS485) | VOD2 | 1.5 | 5 | V | R = 27Ω (RS485) (Figure 1) | 3 | |
| Change in Magnitude of Driver Differential Output Voltage | ∆VOD | 0.2 | V | R = 27Ω or R = 50Ω (Figure 1) | 3 | ||
| Driver Common-Mode Output Voltage | VOC | 3 | V | R = 27Ω or R = 50Ω (Figure 1) | 3 | ||
| Change in Magnitude of Driver Common-Mode Output Voltage | ∆/VOC/ | 0.2 | V | R = 27Ω or R = 50Ω (Figure 1) | 3 | ||
| Input High Voltage | VINH | 2 | V | DI, DE, RE | 3 | ||
| Input Low Voltage | VINL | 0.8 | V | DI, DE, RE | 3 | ||
| Input Current | IIN1 | -2 | 2 | µA | DI, DE, RE | 3 | |
| Input Current (A, B) | IIN2 | 1 | mA | VCC = 0V or 5.25V, VIN = 12V | 3 | ||
| Input Current (A, B) | IIN2 | -0.8 | mA | VCC = 0V or 5.25V, VIN = −7V | 3 | ||
| Differential Input Threshold Voltage for Receiver | VTH | -0.2 | 0.2 | V | -7V ≤ VCM ≤ 12V | 3 | |
| Receiver Output High Voltage | VOH | 3.5 | V | IO = -4mA, VID = 0.2V | 3 | ||
| Receiver Output Low Voltage | VOL | 0.4 | V | IO = 4mA, VID = -0.2V | 3 | ||
| Three-State Output Current at Receiver | IOZR | -1 | 1 | µA | VCC = Max 0.4V ≤ VO ≤ 2.4V | 3 | |
| Receiver Input Resistance | RIN | 12 | kΩ | -7V ≤ VCM ≤ 12V | 3 | ||
| Driver Short-Circuit Current, VOUT = High | IOSD1 | 250 | mA | VO = -7V | 3 | ||
| Driver Short-Circuit Current, VOUT = Low | IOSD2 | 250 | mA | VO = 10 V | 3 | ||
| Receiver Short-Circuit Current | IOSR | 7 | 85 | mA | 0V ≤ VO ≤ VCC | 3 | |
| Supply Current, Outputs Enabled | ICC | 1.8 | 2.3 | mA | No Load; DI = GND or VCC | 3 | |
| Supply Current, Outputs Disabled | ICC | 1.7 | 2.3 | mA | No Load; DI = GND or VCC | 3 | |
| Driver Input to Output (tPLH) | tPLH | 10 | 30 | 50 | ns | RDIFF = 54Ω, CL1 = CL2 = 100pF (Figures 2, 5) | 4 |
| Driver Input to Output (tPHL) | tPHL | 10 | 30 | 50 | ns | RDIFF = 54Ω, CL1 = CL2 = 100pF (Figures 2, 5) | 4 |
| Driver Output to Output Skew | tSKEW | 4 | 10 | ns | RDIFF = 54Ω, CL1 = CL2 = 100pF (Figures 2, 5) | 4 | |
| Driver Rise or Fall Time | tr, tf | 5 | 15 | 25 | ns | RDIFF = 54Ω, CL1 = CL2 = 100pF (Figures 2, 5) | 4 |
| Driver Enable to Output High | tZH | 40 | 70 | ns | CL = 100pF (Figures 4, 6) S2 Closed | 4 | |
| Driver Enable to Output Low | tZL | 40 | 70 | ns | CL = 100pF (Figures 4, 6) S1 Closed | 4 | |
| Driver Disable Time from Low | tLZ | 40 | 70 | ns | CL = 15pF (Figures 4, 6) S1 Closed | 4 | |
| Driver Disable Time from High | tHZ | 40 | 70 | ns | CL = 15pF (Figures 4, 6) S2 Closed | 4 | |
| Receiver Input to Output (tPLH) | tPLH | 15 | 25 | 50 | ns | RDIFF = 54Ω, CL1 = CL2 = 100pF (Figures 2, 7) | 4 |
| Receiver Input to Output (tPHL) | tPHL | 20 | 30 | 55 | ns | RDIFF = 54Ω, CL1 = CL2 = 100pF (Figures 2, 7) | 4 |
| Differential Receiver Skew | tSKEW | 5 | 15 | ns | /tPLH, tPHL/, RDIFF = 54Ω, CL1 = CL2 = 100pF (Figures 2, 7) | 4 | |
| Receiver Enable to Output Low | tZL | 30 | 45 | ns | CL = 15pF (Figures 3, 8) S1 Closed | 4 | |
| Receiver Enable to Output High | tZH | 30 | 45 | ns | CL = 15pF (Figures 3, 8) S2 Closed | 4 | |
| Receiver Disable from Low | tLZ | 30 | 45 | ns | CL = 15pF (Figures 3, 8) S1 Closed | 4 | |
| Receiver Disable from High | tHZ | 30 | 45 | ns | CL = 15pF (Figures 3, 8) S2 Closed | 4 | |
| Receiver Input Hysteresis | ∆VTH | 60 | mV | VCM = 0V | 3 |
CAD (KiCad official)
- Symbol:
LTC1485CS8#TRPBF - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SO-8 (KiCad packages3D, STEP)
- 3D model files:
ltc1485cs8-trpbf-etched.step/ltc1485cs8-trpbf-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ltc1485cs8-trpbf.step/ltc1485cs8-trpbf.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Analog Devices datasheet (14 pp, sha256
714e519690a7e417, retrieved 2026-10-28, tier: manufacturer) - 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).