PCA9557PW,118
The PCA9557PW,118 is an electronic component from Texas Instruments. View the full PCA9557PW,118 datasheet below including key specifications, electrical characteristics, absolute maximum ratings.
PCA9557PW,118 shares its datasheet with PCA9557, whose page lists every part number it covers.
Official PCA9557PW,118 datasheet (PDF) — the source this page was extracted from.
Manufacturer
Texas InstrumentsPackage
TSSOP-16
PCA9557PW,118 Key Specifications
| Parameter | Value |
|---|---|
| Standby supply current (ICC) | 0.25 μA typ, 0.9 μA max at VCC = 3.6 V, fSCL = 0 kHz |
| Operating supply current | 12 μA typ, 22 μA max at VCC = 3.6 V, fSCL = 400 kHz |
| Power-on reset voltage (VPOR) | 1.65 V typ, 2.1 V max |
| P-port IOL | 8 mA min at VOL = 0.55 V, 10 mA min at VOL = 0.7 V (VCC 2.3–5.5 V) |
| SDA IOL | 3 mA min at VOL = 0.4 V (VCC 2.3–5.5 V) |
| Input leakage (P port) | 1 μA max |
| Input capacitance | SCL 4 pF typ; SDA 5.5 pF typ; P port 7.5 pF typ |
| Output data valid from SCL | 250 ns max (P0), 200 ns max (P1–P7) |
PCA9557PW,118 Overview
Part: PCA9557 — Texas Instruments
Type: I2C/SMBus 8-bit I/O Expander
Description: Remote 8-bit I2C and SMBus I/O expander with reset and configuration registers, 2.3–5.5 V supply, 400 kHz Fast-mode I2C, 5 V tolerant I/Os and 1 μA maximum standby current.
Operating Conditions:
- Supply voltage: 2.3–5.5 V
- Operating temperature: -40 to 85 °C
- I2C clock: up to 400 kHz (Fast mode)
- P-port output current: IOL max 25 mA (P7–P0); IOH max -10 mA (P7–P1)
Absolute Maximum Ratings:
- Max supply voltage: 6 V (VCC); input and output voltage max 6 V
- Continuous output low current: 50 mA; continuous output high current: -50 mA
- Continuous current through VCC: 160 mA; through GND: -250 mA
- Storage temperature: -65 to 150 °C
Key Specs:
- Standby supply current (ICC): 0.25 μA typ, 0.9 μA max at VCC = 3.6 V, fSCL = 0 kHz
- Operating supply current: 12 μA typ, 22 μA max at VCC = 3.6 V, fSCL = 400 kHz
- Power-on reset voltage (VPOR): 1.65 V typ, 2.1 V max
- P-port IOL: 8 mA min at VOL = 0.55 V, 10 mA min at VOL = 0.7 V (VCC 2.3–5.5 V)
- SDA IOL: 3 mA min at VOL = 0.4 V (VCC 2.3–5.5 V)
- Input leakage (P port): 1 μA max
- Input capacitance: SCL 4 pF typ; SDA 5.5 pF typ; P port 7.5 pF typ
- Output data valid from SCL: 250 ns max (P0), 200 ns max (P1–P7)
Features:
- I2C to parallel port expander
- 5 V tolerant I/O ports
- Three hardware address pins allow up to eight devices on one bus
- Input/output configuration register and polarity inversion register
- Active-low reset input and internal power-on reset
- High-impedance open-drain on P0
- Powers up with all channels as inputs, with no glitch on power-up
- Noise filter on SCL and SDA inputs
- Latched outputs with high current drive for directly driving LEDs
- Latch-up performance exceeds 100 mA per JESD 78, class II
- ESD: HBM ±2000 V, CDM ±1000 V
Applications:
- Telecom shelters: filter units
- Servers
- Routers (telecom switching equipment)
- Personal computers
- Personal electronics
- Industrial automation
- Products with limited GPIO
Package:
- D (SOIC, 16) – 9.9 mm × 6 mm
- DB (SSOP, 16) – 6.2 mm × 7.8 mm
- DGV (TVSOP, 16) – 3.6 mm × 6.4 mm
- PW (TSSOP, 16) – 5 mm × 6.4 mm
- RGY (VQFN, 16) – 4 mm × 3.5 mm
- RGV (VQFN, 16) – 4 mm × 4 mm
PCA9557PW,118 Features
- Low standby current consumption of 1μA maximum
- I 2 C to parallel port expander
- Operating power-supply voltage range of 2.3V to 5.5V
- 5V Tolerant I/O ports
- 400kHz Fast I 2 C bus
- Three hardware address pins allow for use of up to eight devices on I 2 C/SMBus
- Lower-voltage higher-performance migration path for PCA9556
- Input and output configuration register
- Polarity inversion register
- Active-low reset input
- Internal power-on reset
- High-impedance open drain on P0
- Power up with all channels configured as inputs
- No glitch on power up
- Noise filter on SCL or SDA inputs
- Latched outputs with high current drive maximum capability for directly driving LEDs
- Latch-up performance exceeds 100mA per JESD 78, class II
- ESD protection exceeds JESD 22
- -2000V Human-body model (A114-A)
- -200V Machine model (A115-A)
- -1000V Charged-device model (C101)
PCA9557PW,118 Applications
- Telecom shelters: filter units
- Servers
- Routers (telecom switching equipment)
- Personal computers
- Personal electronics
- Industrial automation
- Products with GPIO-limited
PCA9557PW,118 Pin Configuration
Figure 4-1. D, DB, DGV, PW Package, 16-Pin SOIC, SSOP, TVSOP, or TSSOP (Top View)
Figure 4-2. RGY or RGV Package, 16-Pin VQFN or VQFN (Top View)
Table 4-1. Pin Functions
| PIN - NAME | PIN - NO. | TYPE (1) | DESCRIPTION |
|---|---|---|---|
| SCL | 1 | I | Serial clock bus. Connect to V CC through a pullup resistor. |
| SDA | 2 | I/O | Serial data bus. Connect to V CC through a pullup resistor. |
| A0 | 3 | I | Address input. Connect directly to V CC or ground. |
| A1 | 4 | I | Address input. Connect directly to V CC or ground. |
| A2 | 5 | I | Address input. Connect directly to V CC or ground. |
| P0 | 6 | I/O | P-port input/output. High impedance open-drain design structure. Connect to V CC through a pullup resistor. |
| P1 | 7 | I/O | P-port input/output. Push-pull design structure |
| GND | 8 | G | Ground |
| P2 | 9 | I/O | P-port input/output. Push-pull design structure |
| P3 | 10 | I/O | P-port input/output. Push-pull design structure |
| P4 | 11 | I/O | P-port input/output. Push-pull design structure |
| P5 | 12 | I/O | P-port input/output. Push-pull design structure |
| P6 | 13 | I/O | P-port input/output. Push-pull design structure |
| P7 | 14 | I/O | P-port input/output. Push-pull design structure |
| RESET | 15 | I | Active-low reset input. Connect to V CC through a pullup resistor if no active connection is used. |
| V CC | 16 | P | Supply voltage |
(1) I = input, O = output, P = power, G = Ground
Table 4-1. Pin Functions
Figure 4-3. RGV Package, 16-Pin QFN (Top View)
Table 4-2. Pin Functions, RGV
| PIN - NAME | PIN - NO. | TYPE (1) | DESCRIPTION |
|---|---|---|---|
| A0 | 1 | I | Address input. Connect directly to V CC or ground. |
| A1 | 2 | I | Address input. Connect directly to V CC or ground. |
| A2 | 3 | I | Address input. Connect directly to V CC or ground. |
| P0 | 4 | I/O | P-port input/output. High impedance open-drain design structure. Connect to V CC through a pullup resistor. |
| P1 | 5 | I/O | P-port input/output. Push-pull design structure |
| GND | 6 | G | Ground |
| P2 | 7 | I/O | P-port input/output. Push-pull design structure |
| P3 | 8 | I/O | P-port input/output. Push-pull design structure |
| P4 | 9 | I/O | P-port input/output. Push-pull design structure |
| P5 | 10 | I/O | P-port input/output. Push-pull design structure |
| P6 | 11 | I/O | P-port input/output. Push-pull design structure |
| P7 | 12 | I/O | P-port input/output. Push-pull design structure |
| RESET | 13 | I | Active-low reset input. Connect to V CC through a pullup resistor if no active connection is used. |
| V CC | 14 | P | Supply voltage |
| SCL | 15 | I | Serial clock bus. Connect to V CC through a pullup resistor. |
| SDA | 16 | I/O | Serial data bus. Connect to V CC through a pullup resistor. |
(1) I = input, O = output, P = power, G = Ground
PCA9557PW,118 Electrical Characteristics
over recommended operating free-air temperature range (unless otherwise noted)
| PARAMETER | PARAMETER | TEST CONDITIONS | VCC | MIN | TYP (1) | MAX | UNIT |
|---|---|---|---|---|---|---|---|
| V IK | Input diode clamp voltage | I I = -18mA | 2.3V to 5.5V | -1.2 | V | ||
| V POR | Power-on reset voltage (3) | V I = V CC or GND, I O = 0 I OH = -8mA | V POR 2.3V 3V 4.5V 4.75V | 1.8 2.6 3 4.1 | 1.65 | 2.1 | V |
| V OH | P-port high-level output voltage | I OH = -10mA | 2.3V 3V 4.5V 4.75V | 1.5 2.5 3 4 | V | ||
| SDA | V OL = 0.4V V OL = 0.5V | 2.3V to 5.5V | 3 8 | 20 | |||
| I OL | P port (2) | V OL = 0.55V V OL = 0.7V | 2.3V to 5.5V | 8 10 | 20 24 | mA | |
| P port, except for P0 (2) | V OH = 2.3V | 2.3V to 5.5V | -4 | mA | |||
| I OH | P0 (2) | V OH = 4.6V | 4.6V to 5.5V | 1 | |||
| SCL, SDA | V OH = 3.3V | 3.3V to 5.5V 2.3V to 5.5V | 1 ±1 | μA | |||
| I I | A2-A0, RESET | V I = V CC or GND | ±1 | μA | |||
| I IH | P port | V I = V CC | 2.3V to 5.5V | 1 | μA | ||
| I IL | P port | V I = GND | 2.3V to 5.5V 5.5V | 19 | 1 25 | μA | |
| V I = V CC or GND, I O = 0, I/O = inputs, f = 400 kHz | 3.6V | 12 | 22 | ||||
| SCL | 2.7V | 8 | 20 | ||||
| Operating mode | 5.5V | 1.5 | 5 | ||||
| I CC | V I = V CC or GND, I O = 0, I/O = inputs, f = 100 kHz | 3.6V | 1 | 4 | μA | ||
| SCL | 2.7V 5.5V | 0.6 0.25 | 3 1 | ||||
| Standby mode | V I = V CC or GND, I O = 0, I/O = | 3.6V | 0.25 | 0.9 | |||
| inputs, f SCL = 0 kHz | 2.7V | 0.2 | 0.8 |
over recommended operating free-air temperature range (unless otherwise noted)
| PARAMETER | PARAMETER | TEST CONDITIONS | VCC | MIN | TYP (1) | MAX | UNIT |
|---|---|---|---|---|---|---|---|
| ΔI CC | Additional current in standby mode | One input at V CC - 0.6 V, Other inputs at V CC or GND | 2.3V to 5.5V | 0.2 | mA | ||
| ΔI CC | Every LED I/O at V I = 4.3 V, f SCL = 0 kHz | 5.5V | 0.4 | mA | |||
| C I | SCL | V I = V CC or GND | 2.3V to 5.5 V | 4 | 6 | pF | |
| C io | SDA | V IO = V CC or GND | 2.3V to 5.5V | 5.5 | 8 | pF | |
| C io | P port | V IO = V CC or GND | 2.3V to 5.5V | 7.5 | 9.5 | pF |
- (1) All typical values are at nominal supply voltage (2.5, 3.3, or 5V VCC) and TA = 25°C.
- (2) Each I/O must be externally limited to a maximum of 25mA, and the P port (P7-P0) must be limited to a maximum current of 200mA.
(3) The total current sourced by all I/Os must be limited to 85mA per bit.
PCA9557PW,118 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted) see (1)
| MIN | MAX | UNIT | |||
|---|---|---|---|---|---|
| V CC | Supply voltage | Supply voltage | -0.5 | 6 | V |
| V I | Input voltage (2) | Input voltage (2) | -0.5 | 6 | V |
| V O | Output voltage (2) | Output voltage (2) | -0.5 | 6 | V |
| I IK | Input clamp current | V I < 0 | -20 | mA | |
| I OK | Output clamp current | V O < 0 | -20 | mA | |
| I IOK | Input/output clamp current | V O < 0 or V O > V CC | -20 | μA | |
| I OL | Continuous output low current | V O = 0 to V CC | 50 | mA | |
| I OH | Continuous output high current | V O = 0 to V CC | -50 | mA | |
| I CC | Continuous current through GND | Continuous current through GND | -250 | mA | |
| I CC | Continuous current through V CC | Continuous current through V CC | 160 | mA | |
| T stg | Storage temperature | Storage temperature | -65 | 150 | °C |
PCA9557PW,118 Recommended Operating Conditions
| MIN | MAX | UNIT | |||
|---|---|---|---|---|---|
| V CC | Supply voltage | Supply voltage | 2.3 | 5.5 | V |
| V IH | High-level input voltage | SCL, SDA | 0.7 × V CC | 5.5 | V |
| A2-A0, P7-P0, RESET | 2.2 | 5.5 | V | ||
| V IL | SCL, SDA | -0.5 | 0.3 × V CC | V | |
| Low-level input voltage | A2-A0, P7-P0, (RESET V CC > 2.4V) | -0.5 | 0.8 | V | |
| RESET V CC ≤ 2.4V | -0.5 | 0.75 | V | ||
| I OH | High-level output current | P7-P1 | -10 | mA | |
| I OL | Low-level output current | P7-P0 | 25 | mA | |
| T A | Operating free-air temperature | Operating free-air temperature | -40 | 85 | °C |
PCA9557PW,118 Thermal Information
over operating free-air temperature range (unless otherwise noted)
| PCA9557 | PCA9557 | PCA9557 | PCA9557 | PCA9557 | PCA9557 | |||
|---|---|---|---|---|---|---|---|---|
| THERMAL METRIC (1) | THERMAL METRIC (1) | D (SSOP) | DB (SSOP) | DGV (SSOP) | PW (SSOP) | RGV (VQFN) | RGY (VQFN) | UNIT |
| 16 PINS | 16 PINS | 16 PINS | 16 PINS | 16 PINS | 16 PINS | |||
| R θJA | Junction-to-ambient thermal resistance | 77.2 | 82 | 120 | 98.0 | 44.5 | 47 | °C/W |
| R θJC(top) | Junction-to-case (top) thermal resistance | 40.0 | 30.7 | 40.1 | °C/W | |||
| R θJB | Junction-to-board thermal resistance | 39.2 | 52.7 | 20.2 | °C/W | |||
| ψ JT | Junction-to-top characterization parameter | 6.5 | 1.0 | 0.9 | °C/W | |||
| ψ JB | Junction-to-board characterization parameter | 38.8 | 52.1 | 20.2 | °C/W | |||
| R θJC(bot) | Junction-to-case (bottom) thermal resistance | N/A | N/A | 5.7 | °C/W |
PCA9557PW,118 Typical Application
Figure 8-1 shows an application in which the PCA9557 can be used.
PCA9557PW,118 Package Information
| PART NUMBER | PACKAGE (1) | PACKAGE SIZE (2) |
|---|---|---|
| PCA9557 | D (SOIC, 16) | 9.9mm × 6mm |
| PCA9557 | DB (SSOP, 16) | 6.2mm × 7.8mm |
| PCA9557 | DGV (TVSOP, 16) | 3.6mm × 6.4mm |
| PCA9557 | PW (TSSOP, 16) | 5mm × 6.4mm |
| PCA9557 | RGY (VQFN, 16) | 4mm × 3.5mm |
| PCA9557 | RGV (VQFN, 16) | 4mm × 4mm |
- (1) For more information, see Section 11.
- (2) The package size (length × width) is a nominal value and includes pins, where applicable.
Logic Diagram
More datasheets
Data on this page is extracted from publicly available manufacturer datasheets using automated tools including AI. It may contain errors or omissions. Always verify specifications against the official manufacturer datasheet before making design or purchasing decisions. See our Terms of Service. Rights holders can submit a takedown request.
Ask your AI agent about the PCA9557PW,118
Connect SheetsData to Claude, Cursor, Codex or any MCP client and your agent reads this datasheet for you: pinout, limits, register maps and design checks, with the numbers taken from the PDF.
claude mcp add --transport http sheetsdata https://mcp.sheetsdata.com/mcp
Then ask: "Can the PCA9557PW,118 run from my 12 V rail? Check it against the datasheet limits."
Create a free account $2 of usage every month, no card needed.