# ISL81487LIBZ-T

**Intersil(Renesas Electronics)** · RS-485/RS-422 ICs · SOIC-8

ISL81487LIBZ-T from Intersil(Renesas Electronics), 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 output: RO is high if A > B by at least 0.2V, low if A < B by 0.2V or more, and high if A and B are unconnected (floating). |
| 2 | RE | input | Receiver output enable: RO is enabled when RE is low and is high impedance when RE is high. |
| 3 | DE | input | Driver output enable: outputs Y and Z are enabled when DE is high and are high impedance when DE is low. |
| 4 | DI | input | Driver input: a low on DI forces output Y low and Z high, and a high on DI forces Y high and Z low. |
| 5 | GND | power_in | Ground connection. |
| 6 | A/Y | bidirectional | 15kV HBM ESD protected RS-485/422-level noninverting receiver input (A) when DE = 0 and noninverting driver output (Y) when DE = 1. |
| 7 | B/Z | bidirectional | 15kV HBM ESD protected RS-485/422-level inverting receiver input (B) when DE = 0 and inverting driver output (Z) when DE = 1. |
| 8 | VCC | power_in | System power supply input, 4.5V to 5.5V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Intersil(Renesas Electronics) |
| Package | SOIC-8 |
| Category | Interface ICs |
| 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 |
|---|---|---|---|---|---|---|---|
| Driver Differential VOUT (with Load) | VOD2 | 2 | 3 |  | V | R = 50Ω (RS-422), (Figure 1) | 4 |
| Driver Differential VOUT (with Load) | VOD2 | 1.5 | 2.3 | 5 | V | R = 27Ω (RS-485), (Figure 1) | 4 |
| Change in Magnitude of Driver Differential VOUT for Complementary Output States | VOD |  | 0.01 | 0.2 | V | R = 27Ω or 50Ω, (Figure 1) | 4 |
| Driver Common-Mode VOUT | VOC |  |  | 3 | V | R = 27Ω or 50Ω, (Figure 1) | 4 |
| Change in Magnitude of Driver Common-Mode VOUT for Complementary Output States | VOC |  | 0.01 | 0.2 | V | R = 27Ω or 50Ω, (Figure 1) | 4 |
| Logic Input High Voltage | VIH | 2 |  |  | V | DE, DI, RE | 4 |
| Logic Input Low Voltage | VIL |  |  | 0.8 | V | DE, DI, RE | 4 |
| Logic Input Current | IIN1 | -2 |  | 2 | µA | DE, DI, RE | 4 |
| Input Current (A/Y, B/Z) | IIN2 |  |  | 140 | µA | DE = 0V, VCC = 4.5 to 5.5V, VIN = 12V | 4 |
| Input Current (A/Y, B/Z) | IIN2 |  |  | -120 | µA | DE = 0V, VCC = 4.5 to 5.5V, VIN = -7V | 4 |
| Input Current (A/Y, B/Z) | IIN2 |  |  | 180 | µA | DE = 0V, VCC = 0V, VIN = 12V | 4 |
| Input Current (A/Y, B/Z) | IIN2 |  |  | -100 | µA | DE = 0V, VCC = 0V, VIN = -7V | 4 |
| Receiver Differential Threshold Voltage | VTH | -0.2 |  | 0.2 | V | -7V ≤ VCM ≤ 12V | 4 |
| Receiver Output High Voltage | VOH | 3.5 |  |  | V | IO = -4mA, VID = 200mV | 4 |
| Receiver Output Low Voltage | VOL |  |  | 0.4 | V | IO = -4mA, VID = 200mV | 4 |
| Three-State (High Impedance) Receiver Output Current | IOZR |  |  | 1 | µA | 0.4V ≤ VO ≤ 2.4V | 4 |
| Receiver Input Resistance | RIN | 96 |  |  | kΩ | -7V ≤ VCM ≤ 12V | 4 |
| No-Load Supply Current (ISL8487E, ISL81487L) | ICC |  | 160 | 200 | µA | DI, RE = 0V or VCC, DE = VCC | 5 |
| No-Load Supply Current (ISL8487E, ISL81487L) | ICC |  | 120 | 145 | µA | DI, RE = 0V or VCC, DE = 0V | 5 |
| Shutdown Supply Current | ISHDN |  | 0.5 | 8 | µA | DE = 0V, RE = VCC, DI = 0V or VCC | 5 |
| Driver Short-Circuit Current, VO = High or Low | IOSD1 | 35 |  | 250 | mA | DE = VCC, -7V ≤ VY or VZ ≤ 12V, (Note 9) | 5 |
| Receiver Short-Circuit Current | IOSR | 7 |  | 85 | mA | 0V ≤ VO ≤ VCC | 5 |
| Driver Input to Output Delay (ISL81487L) | tPLH, tPHL | 150 | 650 | 1200 | ns | RDIFF = 54Ω, CL = 100pF, (Figure 2) | 6 |
| Driver Output Skew (ISL81487L) | tSKEW |  | 160 | 600 | ns | RDIFF = 54Ω, CL = 100pF, (Figure 2) | 6 |
| Driver Differential Rise or Fall Time (ISL81487L) | tR, tF | 250 | 900 | 1200 | ns | RDIFF = 54Ω, CL = 100pF, (Figure 2) | 6 |
| Driver Enable to Output High (ISL81487L) | tZH | 100 | 1000 | 1500 | ns | CL = 100pF, SW = GND, (Figure 3, Note 10) | 6 |
| Driver Enable to Output Low (ISL81487L) | tZL | 100 | 1000 | 1500 | ns | CL = 100pF, SW = VCC, (Figure 3, Note 10) | 6 |
| Driver Disable from Output High (ISL81487L) | tHZ | 150 | 750 | 1500 | ns | CL = 15pF, SW = GND, (Figure 3) | 6 |
| Driver Disable from Output Low (ISL81487L) | tLZ | 150 | 750 | 1500 | ns | CL = 15pF, SW = VCC, (Figure 3) | 6 |
| Receiver Input to Output Delay (ISL81487L) | tPLH, tPHL | 30 | 175 | 250 | ns | (Figure 4) | 6 |
| Receiver Enable to Output High (ISL81487L) | tZH |  | 10 | 50 | ns | CL = 15pF, SW = GND, (Figure 5, Note 11) | 6 |
| Receiver Enable to Output Low (ISL81487L) | tZL |  | 10 | 50 | ns | CL = 15pF, SW = VCC, (Figure 5, Note 11) | 6 |
| Receiver Disable from Output High (ISL81487L) | tHZ |  | 10 | 50 | ns | CL = 15pF, SW = GND, (Figure 5) | 6 |
| Receiver Disable from Output Low (ISL81487L) | tLZ |  | 10 | 50 | ns | CL = 15pF, SW = VCC, (Figure 5) | 6 |
| Maximum Data Rate (ISL81487L) | fMAX | 250 |  |  | kbps |  | 6 |
| Time to Shutdown (ISL81487L) | tSHDN | 50 | 140 | 600 | ns | (Note 12) | 6 |
| Driver Enable from Shutdown to Output High (ISL81487L) | tZH(SHDN) |  | 1100 | 2000 | ns | CL = 100pF, SW = GND, (Figure 3, Notes 12 and 13) | 6 |
| Driver Enable from Shutdown to Output Low (ISL81487L) | tZL(SHDN) |  | 1000 | 2000 | ns | CL = 100pF, SW = VCC, (Figure 3, Notes 12 and 13) | 6 |
| Receiver Enable from Shutdown to Output High (ISL81487L) | tZH(SHDN) |  | 900 | 2000 | ns | CL = 15pF, SW = GND, (Figure 3, Notes 12 and 14) | 6 |
| Receiver Enable from Shutdown to Output Low (ISL81487L) | tZL(SHDN) |  | 900 | 2000 | ns | CL = 15pF, SW = VCC, (Figure 3, Notes 12 and 14) | 6 |
| Supply voltage VCC | VCC | 4.5 |  | 5.5 | V | Test Conditions: VCC = 4.5V to 5.5V | 4 |
| Operating Temperature Range (ISL8XXXIX) |  | -40 |  | 85 | °C |  | 4 |
| VCC to Ground | VCC |  |  | 7 | V |  | 4 |
| Input Voltages DI, DE, RE |  | -0.5 |  |  | V | Maximum is VCC + 0.5V (not numeric) | 4 |
| Input/Output Voltages A/Y, B/Z |  | -8 |  | 12.5 | V |  | 4 |
| Output Voltage RO |  | -0.5 |  |  | V | Maximum is VCC + 0.5V (not numeric) | 4 |
| Maximum Junction Temperature (Plastic Package) | TJ |  |  | 150 | °C |  | 4 |
| Maximum Storage Temperature Range |  | -65 |  | 150 | °C |  | 4 |
| Maximum Lead Temperature (Soldering 10s) |  |  |  | 300 | °C | 10s, SOIC lead tips only | 4 |
| Thermal Resistance JA, 8 Ld SOIC Package | θJA |  | 170 |  | °C/W | Typical, Note 5 | 4 |

## CAD (KiCad official)

- Symbol: `ISL81487LIBZ-T`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `isl81487libz-t-etched.step` / `isl81487libz-t-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `isl81487libz-t.step` / `isl81487libz-t.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Intersil(Renesas Electronics) datasheet](docs/isl81487libz-t-datasheet.pdf) (16 pp, sha256 `32d5fa1f812628bf`, retrieved 2026-10-28, tier: lcsc)
- **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/isl81487libz-t-datasheet.pdf)