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NXP Semiconductors PCA9703PW,112
- Part No.:
- PCA9703PW,112
- Manufacturer:
- NXP Semiconductors
- Category:
- I/O Expanders
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
PCA9703PW,112.pdf
- Description:
- IC XPNDR 5MHZ SPI SERIAL 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,669
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Product details
Overview
PCA9703PW,112 from NXP Semiconductors is a low-power, 18 V tolerant 16-bit SPI General Purpose Input (GPI) shift register for automotive switch monitoring. It features maskable open-drain interrupt output, 4.5–5.5 V supply operation, 2.5 µA max IDD, and operates from −40 °C to +125 °C. Used in body control modules to monitor up to 16 high-voltage switches with daisy-chain capability.
For engineers reviewing the PCA9703PW,112 datasheet, PCA9703PW,112 pinout, PCA9703PW,112 application, or PCA9703PW,112 equivalent, key selection considerations include 18 V input tolerance with 100 kΩ series resistor, interrupt masking per input, INT_EN-controlled power gating, SPI daisy-chaining up to 5 MHz, and AEC-Q100-compliant TSSOP24 packaging.
Technical Context
The PCA9703PW,112 implements a synchronous SPI interface with CS falling edge sampling of input port status into an input status register, followed by parallel load into a shift register on the first SCLK rising edge. Data is shifted out MSB-first with SDIN sampled on SCLK falling edges and SDOUT driven after CS assertion.
Its interrupt logic asserts INT (active LOW, open-drain) when any unmasked GPI input changes state relative to the stored input status register - cleared automatically on CS falling edge or via software mask update. INT_EN simultaneously enables GPI inputs and INT output, enabling cyclic biasing for ultra-low standby current in automotive ECU wake-up extensions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Range | 4.5 V to 5.5 V - supports standard 5 V automotive rail with ±10 % tolerance |
| Input Voltage Tolerance | 18 V with ≥100 kΩ series resistor - withstands double-battery (32 V), jump-start (27 V), and load-dump (40 V) transients when properly biased |
| Supply Current | Max 2.5 µA at VDD = 5.5 V - enables always-on monitoring in battery-sensitive applications like ECU standby mode |
| SPI Speed | Up to 5 MHz - allows fast polling of 16 inputs in <3.2 µs per read cycle |
| Interrupt Output | Open-drain, active LOW - supports wired-AND daisy-chaining of multiple PCA9703 devices to single MCU interrupt line |
| Operating Temp | −40 °C to +125 °C - qualified for under-hood automotive environments per AEC-Q100 Grade 1 |
| Input Thresholds | VIL ≤ 0.55 × VDD (min 2.5 V at 4.5 V); VIH ≥ 0.8 × VDD - ensures robust noise margin with hysteresis ≥70 mV |
Pinout & Package
TSSOP24 package (SOT355-1), 4.4 mm body width, 0.65 mm pitch, thermally enhanced for automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDOUT (Pin 1) | 3-state serial data output | Drives high-impedance when CS = HIGH; outputs MSB-first shift register data after CS assertion and first SCLK rising edge |
| INT (Pin 2) | Open-drain interrupt output | Active LOW signal asserted when unmasked GPI input changes state; requires external 10 kΩ pull-up |
| INT_EN (Pin 3) | GPI & interrupt enable input | Active HIGH control: disables GPI inputs and INT output when LOW to eliminate leakage and reduce system standby current |
| IN0–IN15 (Pins 4–20) | 16 general-purpose input ports | 18 V tolerant with internal ESD protection; each accepts external series resistor for overvoltage clamping in automotive battery-connected switches |
| CS (Pin 21) | Chip select (active LOW) | Falling edge captures current input states into status register and clears pending interrupt; rising edge stores updated interrupt mask |
| SCLK (Pin 22) | Serial clock input | Rising edges shift data out; falling edges sample SDIN - supports 5 MHz max frequency with defined setup/hold times |
| SDIN (Pin 23) | Serial data input | 20 µA internal pull-down prevents floating during daisy-chain operation; sampled on SCLK falling edge |
| VDD (Pin 24) | Supply voltage | 4.5–5.5 V nominal; powers internal logic, I/O buffers, and ESD structures - VPOR = 1.8–2.2 V for reliable power-on reset |
Key Features
| Feature | Design Value |
|---|---|
| 16-channel GPI with maskable interrupt | Each IN0–IN15 can be individually masked via SPI-shifted 16-bit pattern - eliminates false interrupts from non-critical switches |
| 18 V input tolerance + ESD robustness | With ≥100 kΩ series resistor, survives 40 V load dump; exceeds 5 kV HBM / 1000 V CDM ESD ratings - reduces need for external TVS diodes |
| INT_EN controlled power gating | Simultaneously disables GPI inputs and INT output when LOW - cuts leakage to sub-µA level during cyclic biasing in SBC wake extensions |
| SPI daisy-chain support | SDOUT-to-SDIN cascading enables monitoring of >16 switches without additional MCU GPIOs - all INT outputs wired-AND to single interrupt line |
| AEC-Q100 Grade 1 qualification | Validated for −40 °C to +125 °C operation with latch-up immunity >100 mA - suitable for direct integration into body control modules and junction boxes |
Applications
| Body Control Module Switch Monitoring | SBC Wake Port Extension |
|---|---|
Use Scenario: Monitoring door lock/unlock, trunk release, hood open, and seat position switches in modern vehicle BCMs. IC Role / Device Role / Timing Role: GPI shift register capturing 16 discrete switch states via SPI; generates interrupt only on relevant state transitions. Use Value: Reduces MCU GPIO count and firmware polling overhead while maintaining fail-safe detection of critical mechanical events. | Use Scenario: Extending wake-up capability of NXP UJA106x/UJA107xA System Basis Chips with 16 additional inputs for low-power ECU standby. IC Role / Device Role / Timing Role: Cyclically enabled GPI interface synchronized with SBC's WBIAS or V3 bias rail; INT_EN gates both inputs and interrupt. Use Value: Enables microcontroller stop-mode operation with <1 µA total system standby current - meets OEM sleep current targets. |
| Automotive Load-Dump Resilient Sensing | Emergency Lighting Switch Interface |
Use Scenario: Detecting manual override switches in 12 V emergency lighting systems exposed to 40 V load-dump transients. IC Role / Device Role / Timing Role: High-voltage-tolerant input conditioner feeding status to MCU via isolated SPI bus. Use Value: Eliminates need for external voltage clamping circuitry - simplifies BOM and improves board-level reliability in harsh electrical environments. | Use Scenario: Interfacing momentary push-button switches in battery-backed emergency exit signage with strict low-power requirements. IC Role / Device Role / Timing Role: Always-on GPI with interrupt-driven wake-up; INT_EN disabled during deep sleep to prevent leakage paths. Use Value: Achieves <2.5 µA quiescent current while retaining instant response to user-initiated emergency activation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit SPI GPI applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX7319ETL+ | 18 V tolerant inputs, but requires 2.7–5.5 V VDD; no INT_EN pin; fixed 16-bit mask register (not SPI-programmable) | Lacks cyclic biasing control and dynamic interrupt masking - less flexible for SBC wake extension | Choose MAX7319ETL+ only if fixed-mask operation and wider VDD range are prioritized over low-power gating |
| TPIC6B595N | 8-bit shift register with open-drain outputs; designed as output driver, not input monitor; no interrupt or masking logic | Not functionally equivalent - lacks GPI, interrupt generation, and high-voltage input tolerance | TPIC6B595N is unsuitable as direct alternative; only consider for output-driving applications requiring high-current sinking |
Compared with MAX7319ETL+, PCA9703PW,112 provides dynamic interrupt masking and INT_EN power gating essential for automotive wake architecture; versus TPIC6B595N, it delivers true 16-bit input monitoring with 18 V tolerance - making it uniquely suited for BCM and SBC extension roles.
Availability
PCA9703PW,112 is available at Aetrix Electronics and suitable for automotive body control modules, SBC wake port extensions, and emergency lighting systems requiring stable component supply across extended temperature and voltage stress conditions.
Supply support for PCA9703PW,112 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor leader focused on automotive, industrial, and IoT applications, with deep expertise in secure connectivity and power-efficient mixed-signal solutions.
The PCA9703PW,112 belongs to NXP's automotive-grade interface IC portfolio, specifically engineered to extend wake-up capabilities and simplify high-voltage switch monitoring in next-generation electronic control units.
FAQ
What is the maximum input voltage the PCA9703PW,112 can tolerate on its IN0–IN15 pins?
The PCA9703PW,112 supports up to 18 V on its GPI inputs when used with a minimum 100 kΩ external series resistor. With appropriate resistor sizing, it withstands automotive transients including 27 V jump-start and 40 V load-dump events. Without the series resistor, absolute maximum input voltage is 6 V per the limiting values table.
How does the INT_EN pin affect power consumption in the PCA9703PW,112?
When INT_EN is driven LOW, the PCA9703PW,112 disables both GPI input circuitry and the INT output driver, reducing supply current to sub-microamp levels. This enables ultra-low-power cyclic biasing in applications like SBC wake extensions, where bias rails are active only briefly before INT_EN is asserted.
Can multiple PCA9703PW,112 devices be connected in daisy-chain configuration?
Yes - the PCA9703PW,112 supports daisy-chaining via SDOUT-to-SDIN connection. SCLK and CS are shared across all devices, while INT outputs can be wired-AND together using their open-drain structure. This allows monitoring of >16 switches with a single SPI interface and one MCU interrupt line.
What is the purpose of the interrupt mask feature in the PCA9703PW,112?
The interrupt mask feature allows software to selectively disable interrupt generation from specific GPI inputs (IN0–IN15) by shifting a 16-bit pattern into the device via SPI. A '0' in the mask bit disables that input's interrupt; a '1' enables it - preventing spurious interrupts from non-critical switches while preserving responsiveness on priority signals.
Is the PCA9703PW,112 AEC-Q100 qualified?
Yes - the PCA9703PW,112 is AEC-Q100 qualified (Grade 1, −40 °C to +125 °C). The PCA9703PW/Q900 variant is explicitly marked as AEC-Q100 compliant in NXP's ordering information, and the PCA9703PW,112 shares identical die and TSSOP24 packaging, confirming qualification for automotive use.
PCA9703PW,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Number of I/O:
- 16 (Input Only)
- Interface:
- SPI Serial
- Interrupt Output:
- Yes
- Features:
- -
- Output Type:
- Push-Pull
- Current - Output Source/Sink:
- -
- Clock Frequency:
- 5 MHz
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TSSOP
PCA9703PW,112 FAQ
1.How can I place an order for PCA9703PW,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9703PW,112 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for PCA9703PW,112 reliable?
The price and inventory of PCA9703PW,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9703PW,112 is usually 5 days.
3.What payment methods are accepted for PCA9703PW,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9703PW,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9703PW,112?
PCA9703PW,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9703PW,112 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for PCA9703PW,112?
For technical support, including PCA9703PW,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9703PW,112 requirements.
6.How does Aetrix verify that PCA9703PW,112 is sourced from the original manufacturer or authorized distributors?
All PCA9703PW,112 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PCA9703PW,112 meets industry standards.
7.What is the process for return or replacement of PCA9703PW,112?
All PCA9703PW,112 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9703PW,112, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The PCA9703PW,112 part is unused and in its original packaging.
Return procedure for PCA9703PW,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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