# COSMAX13488EESA

**COSINE** · RS-485 / RS-422 ICs · SOP-8

COSMAX13488EESA from COSINE, in a SOP-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: when the receiver is enabled (RE low) and A is more than 200mV above B, RO is high, and when A is more than 200mV below B, RO is low. |
| 2 | RE | input | Receiver output enable: a low enables the receiver output RO, and a high lets the auto-direction circuit control the receiver; RE is a hot-swap input. |
| 3 | SHDN | input | Shutdown: drive low to put the device in shutdown mode, and drive high for normal operation. |
| 4 | DI | input | Driver input: low forces the non-inverting output low and the inverting output high, high forces the non-inverting output high and the inverting output low, and DI is the input to the internal state machine that automatically enables and disables the driver. |
| 5 | GND | power_in | Ground. |
| 6 | A | bidirectional | Non-inverting receiver input and non-inverting driver output on the RS-485 bus. |
| 7 | B | bidirectional | Inverting receiver input and inverting driver output on the RS-485 bus. |
| 8 | VCC | power_in | Power supply, 3-V to 5.5-V; bypass VCC to GND with a 0.1µF capacitor. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | COSINE |
| Package | SOP-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 |
|---|---|---|---|---|---|---|---|
| DC supply voltage, Vcc |  |  |  | 6 | V |  | 3 |
| Control input voltages |  | -0.5 |  |  | V |  | 3 |
| Driver input voltages |  | -0.5 |  |  | V |  | 3 |
| Driver output voltage at A or B |  | -16 |  | 16 | V |  | 3 |
| Receiver input voltage |  | -16 |  | 16 | V |  | 3 |
| Receiver output voltage |  | -0.5 |  |  | V |  | 3 |
| Operating junction temperature |  | -40 |  | 135 | °C |  | 3 |
| Storage temperature |  | -55 |  | 150 | °C |  | 3 |
| DC supply voltage |  | 3 | 5 | 5.5 | V |  | 4 |
| Input voltage at any bus terminal |  | -7 |  | 12 | V |  | 4 |
| Differential input voltage |  | -12 |  | 12 | V |  | 4 |
| Differential load resistance |  | 54 |  | 60 | Ω |  | 4 |
| Data rate (COS13488E) |  |  |  | 12 | Mbps |  | 4 |
| Operating ambient temperature |  | -40 |  | 85 | °C |  | 4 |
| Operating junction temperature |  | -40 |  | 125 | °C |  | 4 |
| Differential driver output (no load) | VOD1 |  | 3 | 3.5 | V | IO = 0 | 5 |
| Differential driver output (with load) | VOD2 | 2 |  |  | V | RDIFF = 100Ω (RS422) | 5 |
| Differential driver output (with load) | VOD2 | 1.5 |  | 2.5 | V | RDIFF = 54Ω (RS485), (See Figure 2) | 5 |
| Change in magnitude of driver differential output voltage for complementary output states | ΔVOD | -0.2 | 0 | 0.2 | V | RDIFF = 54Ω or 100Ω, (See Figure 2) | 5 |
| Driver common-mode output voltage | VOC | 1 |  | 3 | V | RDIFF = 54Ω or 100Ω, (See Figure 2) | 5 |
| Change in magnitude of driver common-mode output voltage for complementary output states | ΔVOC |  |  | 0.2 | V | RDIFF = 54Ω or 100Ω, (See Figure 2) | 5 |
| Driver disable threshold | VDT | 0.6 |  | 1 | V |  | 5 |
| Driver short-circuit current | IOS | -250 |  | 250 | mA | VO = -7V to 12V, (See Figure 2) | 5 |
| Receiver differential threshold voltage | VTH | -200 | -125 | -50 | mV | VCM = -7V to 12V | 5 |
| Input current (A, B) | IIN |  |  | 200 | μA | VCC = 0V or 5V, VDE = 0V; VIN = 12V | 5 |
| Input current (A, B) | IIN | -200 |  |  | μA | VCC = 0V or 5V, VDE = 0V; VIN = -7V | 5 |
| Receiver output low voltage | VOL |  | 0.2 | 0.4 | V | IO = 4mA | 5 |
| Receiver output short-circuit current | IOSR | -60 |  | 60 | mA | VO = 0V to Vcc | 5 |
| Tristate output leakage current | IOZR | -1 |  | 1 | μA | VO = 0.4 to 2.4V | 5 |
| Logic input high voltage | VIH | 2 |  |  | V | DI, RE, SHDN | 6 |
| Logic input low voltage | VIL |  |  | 0.8 | V | DI, RE, SHDN | 6 |
| Logic input current | IIN1 | -5 |  | 5 | μA | DI, RE, SHDN | 6 |
| Supply current (quiescent) | ICC |  | 700 | 900 | μA | SHDN=VCC, RE=0, no Load | 6 |
| Shutdown current | ISHDN |  |  | 10 | μA | SHDN=0 | 6 |
| Thermal shutdown junction temperature | TSD |  | 150 | 170 | °C |  | 6 |
| Propagation delay input to output, low to high (driver) | tPLH |  |  | 50 | ns | RL = 110Ω, CL = 50pF (See Figure 3) | 7 |
| Propagation delay input to output, high to low (driver) | tPHL |  |  | 50 | ns | RL = 110Ω, CL = 50pF (See Figure 3) | 7 |
| Output to output skew (driver) | tSK |  |  | 5 | ns |  | 7 |
| Differential output rise or fall time | tr, tf |  |  | 15 | ns |  | 7 |
| Enable to output high (driver) | tPZH |  |  | 70 | ns | CL = 100pF, S2 = Closed (See Figure 4 and Figure 5) | 8 |
| Enable to output low (driver) | tPZL |  |  | 70 | ns | CL = 100pF, S1 = Closed (See Figure 4 and Figure 5) | 8 |
| Disable time from low (driver) | tPLZ |  |  | 50 | ns | CL = 15pF, S1 = Closed (See Figure 4 and Figure 5) | 8 |
| Disable time from high (driver) | tPHZ |  |  | 50 | ns | CL = 15pF, S2 = Closed (See Figure 4 and Figure 5) | 8 |
| Maximum data rate (driver) | fMAX |  |  | 12 | Mbps |  | 8 |
| Propagation delay input to output, low to high (receiver) | tPLH |  |  | 75 | ns | RDIFF = 54Ω, CRL = 100pF (See Figure 6) | 8 |
| Propagation delay input to output, high to low (receiver) | tPHL |  |  | 75 | ns | RDIFF = 54Ω, CRL = 100pF (See Figure 6) | 8 |
| Output to output skew (receiver) | tSK |  |  | 5 | ns |  | 8 |
| Enable to output high (receiver) | tPZH |  |  | 50 | ns | CRL = 15pF, S1 = Closed (See Figure 7 and Figure 8) | 8 |
| Enable to output low (receiver) | tPZL |  |  | 50 | ns | CRL = 15pF, S2 = Closed (See Figure 7 and Figure 8) | 8 |
| Disable time from low (receiver) | tPLZ |  |  | 25 | ns | CRL = 15pF, S1 = Closed (See Figure 7 and Figure 8) | 8 |
| Disable time from high (receiver) | tPHZ |  |  | 25 | ns | CRL = 15pF, S2 = Closed (See Figure 7 and Figure 8) | 8 |
| Maximum data rate (receiver) | fMAX |  |  | 12 | Mbps |  | 8 |
| Package thermal resistance, junction-to-ambient (SOP8) | RθJA |  | 150 |  | °C/W | SOP8 package | 4 |
| Receiver input hysteresis | ΔVTH |  | 40 |  | mV | VCM = 0V | 5 |
| Receiver input resistance | RIN |  | 96 |  | kΩ | VCM = -7V to 12V | 5 |
| Thermal shutdown hysteresis | THYS |  | 30 |  | °C |  | 6 |

## CAD (KiCad official)

- Symbol: `COSMAX13488EESA`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `cosmax13488eesa-etched.step` / `cosmax13488eesa-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cosmax13488eesa.step` / `cosmax13488eesa.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [COSINE datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604440556051582976) (14 pp, sha256 `f2c3f198f4edb42b`, retrieved 2026-10-18, 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/cosmax13488eesa-datasheet.pdf)