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NXP Semiconductors PCA9922PW,118
- Part No.:
- PCA9922PW,118
- Manufacturer:
- NXP Semiconductors
- Category:
- LED Drivers
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
PCA9922PW,118.pdf
- Description:
- IC LED DRVR LIN PWM 60MA 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,935
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Product details
Overview
PCA9922PW,118 from NXP Semiconductors is an 8-channel constant current LED driver IC for signage and display systems, featuring 15–60 mA per channel (set by external REXT), 25 MHz serial interface, edge-rate-controlled outputs, and integrated open-circuit/short-to-ground error detection. It operates from 3.3 V to 5.5 V and supports industrial temperature range (−40 °C to +85 °C).
For engineers reviewing the PCA9922PW,118 datasheet, PCA9922PW,118 pinout, PCA9922PW,118 application, or PCA9922PW,118 equivalent, this device delivers precise current matching (±6% bit-to-bit), cascading capability via SDO/SDI, and real-time fault reporting-critical for high-reliability LED matrix control in outdoor displays and transportation signage.
Technical Context
The PCA9922PW,118 implements an 8-bit shift register with parallel latch (LE-controlled) and global output enable (OE-active-low), enabling serial-to-parallel data conversion for LED on/off control. Its constant-current sinks maintain uniform brightness across LEDs with varying forward voltages (VF).
Error detection operates through a three-phase timing sequence (Enter/Capture/Exit) using CLK, LE, and OE pins-loading fault status into the shift register for readback via SDO. The device supports daisy-chaining: SDO (falling-edge output) feeds SDI (rising-edge input) of the next PCA9922 in series.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output channels | 8 low-side constant-current sinks (LED0–LED7), each programmable 15–60 mA via REXT |
| Serial interface speed | Up to 25 MHz clock frequency-enables rapid refresh of large LED arrays without data bottlenecks |
| Current matching | ±6% bit-to-bit at 25 °C, VDD = 5.0 V-ensures uniform LED brightness within a single device |
| Supply voltage | 3.3 V to 5.5 V-compatible with both 3.3 V microcontrollers and legacy 5 V display controllers |
| Error detection | Detects LED open-circuit and output short-to-ground; fault status read serially after dedicated timing sequence |
| Operating temperature | −40 °C to +85 °C-validated for outdoor signage and industrial ambient conditions |
| ESD protection | 2000 V HBM, 200 V MM, 1000 V CDM-robust handling during assembly and field service |
Pinout & Package
TSSOP16 package (SOT403-1): plastic thin shrink small outline, 16 leads, 4.4 mm body width; requires standard reflow profile per AN10365.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSS | Power supply ground | Primary return path for all internal circuitry and LED sink currents; must be low-impedance |
| VDD | Power supply voltage | 3.3 V–5.5 V supply for logic and current regulation; bypass with 10 μF capacitor per datasheet Fig 10 |
| SDI | Serial data input | Rising-edge sampled input for shift register loading; enables daisy-chain input from controller or upstream device |
| R_EXT | Analog current-setting input | Connects external resistor to set full-scale output current (15–60 mA); tolerance directly impacts accuracy |
| CLK | Serial clock input | Drives shift register (rising edge) and controls SDO timing (falling edge); max 25 MHz operation |
| SDO | Serial data output | Falling-edge output of shift register; used to cascade data to next device's SDI pin |
| LE/DM1 | Latch enable / Detection Mode 1 | Active-HIGH signal transfers shift register contents to output latches; internal 100–400 kΩ pull-down |
| OE/DM2 | Output enable / Detection Mode 2 | Active-LOW global enable for all 8 outputs; internal 150–600 kΩ pull-up; controls error detect entry |
| LED0–LED7 | Constant-current LED outputs | Low-side current sinks; each drives one LED cathode; edge-rate controlled to limit EMI during switching |
Key Features
| Feature | Design Value |
|---|---|
| Gradual turn-on/turn-off | Controlled edge rate on LED outputs reduces electromagnetic interference (EMI) in dense PCB layouts |
| Cascadable serial interface | SDO-to-SDI chaining allows unlimited expansion of LED channels without additional MCU GPIOs |
| Integrated fault detection | Detects open-circuit and short-to-ground faults per channel; eliminates need for external sense resistors or ADC monitoring |
| High current accuracy | ±10% chip-to-chip matching enables consistent brightness across multiple PCA9922PW,118 devices in same system |
| Robust thermal design | TSSOP16 package offers 160 °C/W junction-to-ambient thermal resistance-supports continuous 60 mA/channel operation at +85 °C |
Applications
| Full-color LED Signage | Transportation Display Signs |
|---|---|
Use Scenario: Outdoor variable-message signs on highways and rail stations requiring high brightness and long-term reliability under temperature cycling. IC Role / Device Role / Timing Role: PCA9922PW,118 acts as column driver in multiplexed LED matrix, delivering stable per-pixel current independent of VF drift. Use Value: ±6% bit-to-bit current matching ensures uniform color saturation across RGB subpixels; error detection prevents undetected pixel failures affecting message legibility. |
Use Scenario: Real-time bus/train arrival boards in transit hubs exposed to humidity, vibration, and wide ambient temperature swings. IC Role / Device Role / Timing Role: PCA9922PW,118 serves as segment driver in alphanumeric LED modules, synchronized via high-speed serial interface to central controller. Use Value: −40 °C to +85 °C rating guarantees startup and operation in unheated enclosures; open-circuit detection flags failed LEDs before complete segment outage. |
| Commercial LED Billboards | Traffic Signal Displays |
Use Scenario: Large-format video billboards with thousands of LEDs requiring scalable, low-overhead driving architecture. IC Role / Device Role / Timing Role: PCA9922PW,118 forms cascaded chains per panel row/column, reducing controller I/O count and simplifying firmware updates. Use Value: 25 MHz serial interface supports >100 Hz refresh rates for smooth video playback; SDO/SDI daisy-chaining minimizes interconnect complexity and signal integrity issues. |
Use Scenario: Red/amber/green traffic light modules where safety-critical failure detection must occur without external diagnostics hardware. IC Role / Device Role / Timing Role: PCA9922PW,118 provides current-regulated drive for each lamp string and reports open-circuit faults via serial interface to traffic controller. Use Value: Built-in short-to-ground detection prevents false "on" states due to wiring faults; error status readback enables automated maintenance alerts and compliance logging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-channel constant current LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STP08CDC596 | Inverted error status bits; identical pinout and functional behavior otherwise; requires software polarity inversion for fault readback | Same cascading architecture and current range; widely used in European signage OEM designs | Select STP08CDC596 only if existing firmware already handles inverted error data or board layout mandates exact footprint compatibility |
| ST2221A | Functionally equivalent 5 V-only variant (no 3.3 V support); identical error detection logic and timing sequences | Targeted at legacy 5 V-only systems; lacks 3.3 V logic compatibility required for modern low-power controllers | Choose ST2221A when operating exclusively at 5 V and backward compatibility with prior ST2221A-based designs is mandatory |
Compared with STP08CDC596 and ST2221A, the PCA9922PW,118 provides broader supply range (3.3–5.5 V), superior ESD robustness (2000 V HBM), and verified thermal performance in TSSOP16-making it optimal for new designs prioritizing flexibility, reliability, and mixed-voltage interoperability.
Availability
PCA9922PW,118 is available at Aetrix Electronics and suitable for full-color LED signage, transportation display signs, and commercial billboard applications requiring stable component supply, long-lifecycle support, and guaranteed traceability.
Supply support for PCA9922PW,118 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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with over 50 years of analog and mixed-signal design heritage.
The PCA9922PW,118 belongs to NXP's LED driver product line, engineered specifically for high-reliability, high-density LED signage systems requiring integrated fault diagnostics and scalable serial control.
FAQ
What is the maximum output current per channel for the PCA9922PW,118?
The PCA9922PW,118 supports a maximum output current of 60 mA per channel (LED0–LED7), adjustable down to 15 mA using an external resistor connected to the R_EXT pin. This range is confirmed across the full −40 °C to +85 °C operating temperature and applies uniformly to all eight outputs when configured identically.
Does the PCA9922PW,118 support daisy-chaining with other LED drivers?
Yes, the PCA9922PW,118 supports seamless daisy-chaining via its SDO (serial data out) and SDI (serial data in) pins. Data shifts out of SDO on the falling edge of CLK and is captured by the next device's SDI on the rising edge-enabling scalable LED channel expansion without additional controller resources.
How does the PCA9922PW,118 perform LED open-circuit detection?
The PCA9922PW,118 detects open-circuit conditions by comparing actual output current (IO) against a threshold Ith(det) ≈ 0.5 × IO(target). When enabled, a channel reporting IO below this threshold returns a logical '1' in the error status register-readable via the serial interface after executing the defined Enter/Capture/Exit timing sequence.
What package type is used for the PCA9922PW,118?
The PCA9922PW,118 uses the TSSOP16 package (SOT403-1): a plastic thin shrink small outline package with 16 leads and 4.4 mm body width. It features gull-wing leads, JEDEC-standard footprint, and is optimized for automated surface-mount assembly and thermal dissipation in space-constrained signage PCBs.
Is the PCA9922PW,118 compatible with 3.3 V microcontrollers?
Yes, the PCA9922PW,118 operates from 3.3 V to 5.5 V and accepts 3.3 V logic-level inputs (VIH ≥ 0.7 × VDD, VIL ≤ 0.3 × VDD). Its SDI, CLK, LE, and OE pins are fully compatible with 3.3 V microcontrollers without level-shifting, enabling direct interface with modern low-power display controllers.
PCA9922PW,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Linear
- Topology:
- Shift Register
- Internal Switch(s):
- Yes
- Number of Outputs:
- 8
- Voltage - Supply (Min):
- 3.3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 5.5V
- Current - Output / Channel:
- 60mA
- Frequency:
- 25MHz
- Dimming:
- PWM
- Applications:
- Signage
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
PCA9922PW,118 FAQ
1.How can I place an order for PCA9922PW,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9922PW,118 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 PCA9922PW,118 reliable?
The price and inventory of PCA9922PW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9922PW,118 is usually 5 days.
3.What payment methods are accepted for PCA9922PW,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9922PW,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9922PW,118?
PCA9922PW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9922PW,118 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 PCA9922PW,118?
For technical support, including PCA9922PW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9922PW,118 requirements.
6.How does Aetrix verify that PCA9922PW,118 is sourced from the original manufacturer or authorized distributors?
All PCA9922PW,118 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 PCA9922PW,118 meets industry standards.
7.What is the process for return or replacement of PCA9922PW,118?
All PCA9922PW,118 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9922PW,118, 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 PCA9922PW,118 part is unused and in its original packaging.
Return procedure for PCA9922PW,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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