# TCA9536DGKR

**Texas Instruments** · I/O Expanders · MSOP-8

TCA9536DGKR from Texas Instruments, in a MSOP-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 | P0 | bidirectional | P-port input-output with push-pull design structure and internal pull-up resistor enabled by default. |
| 2 | P1 | bidirectional | P-port input-output with push-pull design structure and internal pull-up resistor enabled by default. |
| 3 | P2 | bidirectional | P-port input-output with push-pull design structure and internal pull-up resistor enabled by default. |
| 4 | GND | power_in | Ground. |
| 5 | P3/INT | bidirectional | P-port input-output with push-pull design structure; when configured as INT it operates as open drain, and the internal pull-up resistor is enabled by default. |
| 6 | SCL | bidirectional | Serial clock bus; connect to VCC through a pull-up resistor. |
| 7 | SDA | bidirectional | Serial data bus; connect to VCC through a pull-up resistor. |
| 8 | VCC | power_in | Supply voltage, 1.65 V to 5.5 V recommended operating range. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | MSOP-8 |
| Category | Communication Interface Chip |
| 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 |  | 6 | V |  | 4 |
| Input voltage | VI | -0.5 |  | 6 | V |  | 4 |
| Output voltage | VO | -0.5 |  | 6 | V |  | 4 |
| Input clamp current | IIK |  |  | -20 | mA | VI < 0 | 4 |
| Output clamp current | IOK |  |  | -20 | mA | VO < 0 | 4 |
| Input-output clamp current | IIOK | -20 |  | 20 | mA | VO < 0 or VO > VCC | 4 |
| Continuous output low current | IOL |  |  | 50 | mA | VO = 0 to VCC | 4 |
| Continuous output high current | IOH | -50 |  |  | mA | VO = 0 to VCC | 4 |
| Continuous current through GND | ICC | -250 |  |  | mA |  | 4 |
| Continuous current through VCC | ICC |  |  | 160 | mA |  | 4 |
| Junction temperature | TJ |  |  | 150 | °C |  | 4 |
| Storage temperature | Tstg | -65 |  | 150 | °C |  | 4 |
| ESD HBM | V(ESD) | -4000 |  | 4000 | V | Pins P0-P3, VCC | 4 |
| ESD HBM | V(ESD) | -2000 |  | 2000 | V | Pins SDA, SCL | 4 |
| ESD CDM | V(ESD) | -1000 |  | 1000 | V | All pins | 4 |
| Supply voltage | VCC | 1.65 |  | 5.5 | V |  | 4 |
| Input voltage SCL, SDA | VI | 0 |  | 5.5 | V | SCL, SDA | 4 |
| Input voltage P0-P3 | VI | 0 |  | 5.5 | V | P0-P3 | 4 |
| High-level output current | IOH |  |  | -10 | mA | P3-P0 | 4 |
| Low-level output current | IOL |  |  | 25 | mA | VCC > 1.8 V, P3-P0 | 4 |
| Low-level output current | IOL |  |  | 15 | mA | VCC ≤ 1.8 V, P3-P0 | 4 |
| Ambient temperature | TA | -40 |  | 125 | °C |  | 4 |
| Junction temperature | TJ |  |  | 125 | °C |  | 4 |
| Junction-to-ambient thermal resistance | RθJA |  | 183.7 |  | °C/W | DGK (VSSOP) 8-pin | 5 |
| Junction-to-case (top) thermal resistance | RθJC(top) |  | 76.9 |  | °C/W | DGK (VSSOP) 8-pin | 5 |
| Junction-to-board thermal resistance | RθJB |  | 104.9 |  | °C/W | DGK (VSSOP) 8-pin | 5 |
| Junction-to-top characterization parameter | ΨJT |  | 18.7 |  | °C/W | DGK (VSSOP) 8-pin | 5 |
| Junction-to-board characterization parameter | ΨJB |  | 103.4 |  | °C/W | DGK (VSSOP) 8-pin | 5 |
| Input diode clamp voltage | VIK | -1.2 |  |  | V | II = -18 mA, VCC 1.65 V to 5.5 V | 5 |
| Power-on reset voltage, VCC rising | VPORR |  | 1.2 | 1.6 | V | VI = VCC or GND, IO = 0 | 5 |
| Power-on reset voltage, VCC falling | VPORF | 0.75 |  | 1 | V | VI = VCC or GND, IO = 0 | 5 |
| P-port high-level output voltage | VOH | 1.2 |  |  | V | IOH = -8 mA, VCC 1.65 V | 5 |
| P-port high-level output voltage | VOH | 1.8 |  |  | V | IOH = -8 mA, VCC 2.3 V | 5 |
| P-port high-level output voltage | VOH | 2.6 |  |  | V | IOH = -8 mA, VCC 3 V | 5 |
| P-port high-level output voltage | VOH | 4.1 |  |  | V | IOH = -8 mA, VCC 4.5 V | 5 |
| P-port high-level output voltage | VOH | 1 |  |  | V | IOH = -10 mA, VCC 1.65 V | 5 |
| P-port high-level output voltage | VOH | 1.7 |  |  | V | IOH = -10 mA, VCC 2.3 V | 5 |
| P-port high-level output voltage | VOH | 2.5 |  |  | V | IOH = -10 mA, VCC 3 V | 5 |
| P-port high-level output voltage | VOH | 4 |  |  | V | IOH = -10 mA, VCC 4.5 V | 5 |
| High-level input voltage SDA, SCL | VIH | 0.7 |  |  | V | 0.7 × VCC, VCC 1.65 to 5.5 V (value is multiple of VCC) | 5 |
| High-level input voltage P ports | VIH | 0.7 |  |  | V | 0.7 × VCC, VCC 1.65 to 5.5 V (value is multiple of VCC) | 5 |
| Low-level input voltage SDA, SCL | VIL |  |  | 0.4 | V | 0.4 × VCC, VCC 1.65 to 5.5 V (value is multiple of VCC) | 5 |
| Low-level input voltage P ports | VIL |  |  | 0.3 | V | 0.3 × VCC, VCC 1.65 to 5.5 V (value is multiple of VCC) | 5 |
| Low-level output current SDA | IOL | 20 |  |  | mA | VOL = 0.4 V, VCC 1.65 V to 5.5 V | 5 |
| Low-level output current P0-P3 | IOL | 8 |  |  | mA | VOL = 0.5 V, VCC 1.65 V to 5.5 V | 5 |
| Low-level output current P0-P3 | IOL | 10 |  |  | mA | VOL = 0.7 V, VCC 1.65 V to 5.5 V | 5 |
| Low-level output current INT | IOL | 4 |  |  | mA | VOL = 0.4 V, VCC 1.65 V to 5.5 V | 5 |
| Input leakage current P ports | II | -1 | 0 | 1 | µA | VI = VCC, VCC 1.65 V to 5.5 V | 5 |
| Input leakage current P ports | II | -2 | 0 | 2 | µA | VI = 5.5 V, VCC 0 V | 5 |
| Input leakage current P ports | II | -100 | -40 |  | µA | VI = GND, PU Enabled, VCC 1.65 V to 5.5 V | 6 |
| Input leakage current SCL, SDA | II | -1 | 0 | 1 | µA | VI = VCC or GND, VCC 1.65 V to 5.5 V | 6 |
| Quiescent current operating mode | ICC |  | 22 | 40 | µA | VI = VCC or GND (PU Disabled), I/O = inputs, fSCL = 400 kHz, tr = tf = 300 ns, VCC 5.5 V | 6 |
| Quiescent current operating mode | ICC |  | 11 | 20 | µA | VI = VCC or GND (PU Disabled), I/O = inputs, fSCL = 400 kHz, tr = tf = 300 ns, VCC 3.6 V | 6 |
| Quiescent current operating mode | ICC |  | 8 | 10 | µA | VI = VCC or GND (PU Disabled), I/O = inputs, fSCL = 400 kHz, tr = tf = 300 ns, VCC 2.7 V | 6 |
| Quiescent current operating mode | ICC |  | 5 | 8 | µA | VI = VCC or GND (PU Disabled), I/O = inputs, fSCL = 400 kHz, tr = tf = 300 ns, VCC 1.95 V | 6 |
| Quiescent current operating mode | ICC |  | 225 | 390 | µA | VI = GND, I/O = inputs, fSCL = 400 kHz, tr = tf = 300 ns, PU Enabled, VCC 5.5 V | 6 |
| Quiescent current operating mode | ICC |  | 175 | 280 | µA | VI = GND, I/O = inputs, fSCL = 400 kHz, tr = tf = 300 ns, PU Enabled, VCC 3.6 V | 6 |
| Quiescent current operating mode | ICC |  | 125 | 200 | µA | VI = GND, I/O = inputs, fSCL = 400 kHz, tr = tf = 300 ns, PU Enabled, VCC 2.7 V | 6 |
| Quiescent current operating mode | ICC |  | 100 | 150 | µA | VI = GND, I/O = inputs, fSCL = 400 kHz, tr = tf = 300 ns, PU Enabled, VCC 1.95 V | 6 |
| Quiescent current operating mode | ICC |  |  | 100 | µA | VI = VCC or GND (PU Disabled), I/O = inputs, fSCL = 1 MHz, tr = tf = 120 ns, VCC 5.5 V | 6 |
| Quiescent current operating mode | ICC |  |  | 40 | µA | VI = VCC or GND (PU Disabled), I/O = inputs, fSCL = 1 MHz, tr = tf = 120 ns, VCC 3.6 V | 6 |
| Quiescent current operating mode | ICC |  |  | 25 | µA | VI = VCC or GND (PU Disabled), I/O = inputs, fSCL = 1 MHz, tr = tf = 120 ns, VCC 2.7 V | 6 |
| Quiescent current operating mode | ICC |  |  | 15 | µA | VI = VCC or GND (PU Disabled), I/O = inputs, fSCL = 1 MHz, tr = tf = 120 ns, VCC 1.95 V | 6 |
| Quiescent current operating mode | ICC |  | 225 | 425 | µA | VI = GND, I/O = inputs, fSCL = 1 MHz, tr = tf = 120 ns, PU Enabled, VCC 5.5 V | 6 |
| Quiescent current operating mode | ICC |  | 175 | 250 | µA | VI = GND, I/O = inputs, fSCL = 1 MHz, tr = tf = 120 ns, PU Enabled, VCC 3.6 V | 6 |
| Quiescent current standby mode | ICC |  | 1.5 | 3.9 | µA | VI = VCC, IO = 0, I/O = inputs, fSCL = 0 kHz, VCC 5.5 V | 6 |
| Quiescent current standby mode | ICC |  | 0.9 | 2.2 | µA | VI = VCC, IO = 0, I/O = inputs, fSCL = 0 kHz, VCC 3.6 V | 6 |
| Quiescent current standby mode | ICC |  | 0.6 | 1.8 | µA | VI = VCC, IO = 0, I/O = inputs, fSCL = 0 kHz, VCC 2.7 V | 6 |
| Quiescent current standby mode | ICC |  | 0.6 | 1.5 | µA | VI = VCC, IO = 0, I/O = inputs, fSCL = 0 kHz, VCC 1.95 V | 6 |
| Quiescent current standby mode | ICC |  | 225 | 350 | µA | VI = GND, I/O = inputs, fSCL = 0 kHz, PU Enabled, VCC 5.5 V | 6 |
| Quiescent current standby mode | ICC |  | 175 | 250 | µA | VI = GND, I/O = inputs, fSCL = 0 kHz, PU Enabled, VCC 3.6 V | 6 |
| Quiescent current standby mode | ICC |  | 125 | 200 | µA | VI = GND, I/O = inputs, fSCL = 0 kHz, PU Enabled, VCC 2.7 V | 6 |
| Quiescent current standby mode | ICC |  | 100 | 150 | µA | VI = GND, I/O = inputs, fSCL = 0 kHz, PU Enabled, VCC 1.95 V | 6 |

## CAD (KiCad official)

- Symbol: `TCA9536DGKR`
- Footprint: `Package_SO:MSOP-8_3x3mm_P0.65mm`
- 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files: `tca9536dgkr-etched.step` / `tca9536dgkr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tca9536dgkr.step` / `tca9536dgkr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/tca9536.pdf) (38 pp, sha256 `96e8633ff5d8b9a4`, retrieved 2026-10-23, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/tca9536dgkr-datasheet.pdf)