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PCA9554APWR

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Texas Instruments I/O Expanders, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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PCA9554APWR

Texas Instruments · I/O Expanders · TSSOP-16

PCA9554APWR from Texas Instruments, in a TSSOP-16. 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 A0 input Address input that sets the I2C slave address and must be connected directly to VCC or ground.
2 A1 input Address input that sets the I2C slave address and must be connected directly to VCC or ground.
3 A2 input Address input that sets the I2C slave address and must be connected directly to VCC or ground.
4 P0 bidirectional P-port input/output with push-pull design structure.
5 P1 bidirectional P-port input/output with push-pull design structure.
6 P2 bidirectional P-port input/output with push-pull design structure.
7 P3 bidirectional P-port input/output with push-pull design structure.
8 GND power_in Ground.
9 P4 bidirectional P-port input/output with push-pull design structure.
10 P5 bidirectional P-port input/output with push-pull design structure.
11 P6 bidirectional P-port input/output with push-pull design structure.
12 P7 bidirectional P-port input/output with push-pull design structure.
13 INT output Open-drain active-low interrupt output that must be connected to VCC through a pullup resistor.
14 SCL input Serial clock bus input that must be connected to VCC through a pullup resistor.
15 SDA bidirectional Serial data bus that must be connected to VCC through a pullup resistor.
16 VCC power_in Supply voltage, 2.3 V to 5.5 V recommended operating range.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package TSSOP-16
Category Communication Interface Chip
Pins 16

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 2.3 5.5 V 5
High-level input voltage A2-A0, P7-P0 VIH 2 5.5 V A2-A0, P7-P0 5
High-level input voltage SCL, SDA (min 0.7 × VCC, max VCC) VIH 0.7 1 V SCL, SDA; min printed as 0.7 × VCC, max printed as VCC (values are multipliers of VCC) 5
Low-level input voltage SCL, SDA VIL -0.5 0.3 V SCL, SDA; max printed as 0.3 × VCC (multiplier of VCC) 5
Low-level input voltage A2-A0, P7-P0 VIL -0.5 0.3 V A2-A0, P7-P0; max printed as 0.3 × VCC (multiplier of VCC) 5
High-level output current P7-P0 IOH -10 mA P7-P0 5
Low-level output current P7-P0 IOL 25 mA P7-P0 5
Operating free-air temperature TA -40 85 °C 5
Supply voltage range VCC -0.5 6 V 5
Input voltage range VI -0.5 6 V 5
Output voltage range VO -0.5 6 V 5
Input clamp current IIK -20 mA VI < 0 5
Output clamp current IOK -20 mA VO < 0 5
Input/output clamp current IIOK -20 20 mA VO < 0 or VO > VCC 5
Continuous output low current IOL 50 mA VO = 0 to VCC 5
Continuous output high current IOH -50 mA VO = 0 to VCC 5
Continuous current through GND ICC -250 mA 5
Continuous current through VCC ICC 160 mA 5
Storage temperature range Tstg -65 150 °C 5
ESD HBM V(ESD) 0 2000 V Human body model, all pins 5
ESD CDM V(ESD) 0 1000 V Charged device model, all pins 5
Junction-to-ambient thermal resistance (PW) RθJA 122 °C/W PW (TSSOP) 16 pins 5
Input diode clamp voltage VIK -1.2 V II = -18 mA, VCC 2.3 V to 5.5 V 6
Power-on reset voltage, VCC rising VPORR 1.2 1.5 V VI = VCC or GND, IO = 0 6
Power-on reset voltage, VCC falling VPORF 0.75 1 V VI = VCC or GND, IO = 0 6
P-port high-level output voltage VOH 1.8 V IOH = -8 mA, VCC 2.3 V 6
P-port high-level output voltage VOH 2.6 V IOH = -8 mA, VCC 3 V 6
P-port high-level output voltage VOH 3.1 V IOH = -8 mA, VCC 4.5 V 6
P-port high-level output voltage VOH 4.1 V IOH = -8 mA, VCC 4.75 V 6
P-port high-level output voltage VOH 1.7 V IOH = -10 mA, VCC 2.3 V 6
P-port high-level output voltage VOH 2.5 V IOH = -10 mA, VCC 3 V 6
P-port high-level output voltage VOH 3 V IOH = -10 mA, VCC 4.5 V 6
P-port high-level output voltage VOH 4 V IOH = -10 mA, VCC 4.75 V 6
SDA low-level output current IOL 3 8 mA SDA, VOL = 0.4 V, VCC 2.3 V to 5.5 V 6
P port low-level output current IOL 8 10 mA VOL = 0.5 V, VCC 2.3 V 6
P port low-level output current IOL 8 14 mA VOL = 0.5 V, VCC 3 V 6
P port low-level output current IOL 8 17 mA VOL = 0.5 V, VCC 4.5 V 6
P port low-level output current IOL 8 35 mA VOL = 0.5 V, VCC 4.75 V 6
P port low-level output current IOL 10 13 mA VOL = 0.7 V, VCC 2.3 V 6
P port low-level output current IOL 10 19 mA VOL = 0.7 V, VCC 3 V 6
P port low-level output current IOL 10 24 mA VOL = 0.7 V, VCC 4.5 V 6
P port low-level output current IOL 10 45 mA VOL = 0.7 V, VCC 4.75 V 6
INT low-level output current IOL 3 10 mA INT, VOL = 0.4 V, VCC 2.3 V to 5.5 V 6
Input leakage SCL, SDA II -1 1 μA VI = VCC or GND, VCC 2.3 V to 5.5 V 6
Input leakage A2-A0 II -1 1 μA VI = VCC or GND, VCC 2.3 V to 5.5 V 6
P port high-level input current IIH 1 μA VI = VCC, VCC 2.3 V to 5.5 V 6
P port low-level input current IIL -100 μA VI = GND, VCC 2.3 V to 5.5 V 6
Supply current, operating 400 kHz ICC 104 175 μA VI = VCC, IO = 0, I/O = inputs, fscl = 400 kHz, No load, VCC 5.5 V 6
Supply current, operating 400 kHz ICC 50 90 μA VI = VCC, IO = 0, I/O = inputs, fscl = 400 kHz, No load, VCC 3.6 V 6
Supply current, operating 400 kHz ICC 20 65 μA VI = VCC, IO = 0, I/O = inputs, fscl = 400 kHz, No load, VCC 2.7 V 6
Supply current, operating 100 kHz ICC 60 150 μA VI = VCC, IO = 0, I/O = inputs, fscl = 100 kHz, No load, VCC 5.5 V 6
Supply current, operating 100 kHz ICC 15 40 μA VI = VCC, IO = 0, I/O = inputs, fscl = 100 kHz, No load, VCC 3.6 V 6
Supply current, operating 100 kHz ICC 8 20 μA VI = VCC, IO = 0, I/O = inputs, fscl = 100 kHz, No load, VCC 2.7 V 6
Supply current, standby (VI = GND) ICC 450 700 μA VI = GND, IO = 0, I/O = inputs, fscl = 0 kHz, No load, VCC 5.5 V 6
Supply current, standby (VI = GND) ICC 300 600 μA VI = GND, IO = 0, I/O = inputs, fscl = 0 kHz, No load, VCC 3.6 V 6
Supply current, standby (VI = GND) ICC 230 500 μA VI = GND, IO = 0, I/O = inputs, fscl = 0 kHz, No load, VCC 2.7 V 6
Supply current, standby (VI = VCC) ICC 1.9 3.5 μA VI = VCC, IO = 0, I/O = inputs, fscl = 0 kHz, No load, VCC 5.5 V 6
Supply current, standby (VI = VCC) ICC 1.1 1.8 μA VI = VCC, IO = 0, I/O = inputs, fscl = 0 kHz, No load, VCC 3.6 V 6
Supply current, standby (VI = VCC) ICC 1 1.6 μA VI = VCC, IO = 0, I/O = inputs, fscl = 0 kHz, No load, VCC 2.7 V 6
Additional current in standby mode ΔICC 1.5 mA One input at VCC, 0.6 V, other inputs at VCC or GND, VCC 2.3 V to 5.5 V 6
Additional current in standby mode ΔICC 1 mA Every LED I/O at VI = 4.3 V; fscl = 0 kHz, VCC 5.5 V 6
Input capacitance SCL CI 4 8 pF VI = VCC or GND, VCC 2.3 V to 5.5 V 6
I/O capacitance SDA Cio 5.5 9.5 pF VIO = VCC or GND, VCC 2.3 V to 5.5 V 6
I/O capacitance P port Cio 8 9.5 pF VIO = VCC or GND, VCC 2.3 V to 5.5 V 6
I2C clock frequency (fast mode) fscl 0 400 kHz Fast mode 7
Interrupt valid time (fast mode) tiv 4 μs P port to INT, fast mode 7
Output data valid (fast mode) tpv 350 ns SCL to P7-P0, fast mode 7

CAD (KiCad official)

  • Symbol: PCA9554APWR
  • Footprint: Package_SO:TSSOP-16_4.4x5mm_P0.65mm
  • 3D model: TSSOP-16 (KiCad packages3D, STEP)
  • 3D model files: pca9554apwr-etched.step / pca9554apwr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); pca9554apwr.step / pca9554apwr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (42 pp, sha256 73abe48bc529881d, retrieved 2026-10-26, 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