My Inquiry
My Account
NXP Semiconductors PCU9655PW1,518
- Part No.:
- PCU9655PW1,518
- Manufacturer:
- NXP Semiconductors
- Category:
- LED Drivers
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
PCU9655PW1,518.pdf
- Description:
- IC LED DRV LIN PWM 100MA 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,169
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PCU9655PW1,518 from NXP Semiconductors is a 16-channel Ultra Fast-mode (UFm) I²C-bus LED driver optimized for RGBA LED dimming and blinking, featuring individual 8-bit PWM (31.25 kHz, 0–99.6% duty cycle), group PWM (122 Hz fixed or 15 Hz–16.8 s programmable), 100 mA sink per channel, 40 V output tolerance, and 3–5.5 V supply operation.
For engineers reviewing the PCU9655PW1,518 datasheet, PCU9655PW1,518 pinout, PCU9655PW1,518 application, or PCU9655PW1,518 equivalent, key selection considerations include UFm 5 MHz write-only bus timing, TSSOP28 package compatibility, thermal shutdown protection, software reset capability, and hardware address pin configuration for multi-device bus management.
Technical Context
The PCU9655PW1,518 implements dual-layer PWM control: per-channel 31.25 kHz PWM with 256-step linear brightness resolution, and a separate group-level PWM with either fixed 122 Hz dimming or fully programmable blink frequency (15 Hz to 16.8 s period) and 0–99.6% duty cycle. Its UFm interface operates at up to 5 MHz with write-only unidirectional communication and no internal pull-ups on address pins.
Five hardware address pins (A0–A4) support up to 32 devices on one bus; four software-configurable I²C addresses (one All Call + three Sub Call) enable grouped control of mixed-channel LED drivers. The device includes an 8 MHz internal oscillator, glitch-free power-up outputs, noise-filtered USCL/USDA inputs, and thermal shutdown protection above the junction overtemperature threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LED Channels | 16 independent open-drain outputs, each sinking up to 100 mA with 40 V OFF-state voltage tolerance. |
| Individual PWM | 8-bit resolution (256 steps), fixed 31.25 kHz frequency, 0–99.6% duty cycle for precise per-LED brightness control. |
| Group PWM | 8-bit resolution, selectable mode: fixed 122 Hz dimming or programmable blink period (15 Hz to 16.8 s) with 0–99.6% duty cycle. |
| I²C Interface | Ultra Fast-mode (UFm), 5 MHz max clock, write-only operation; no read-back capability; requires external pull-ups on address pins. |
| Supply & Temp | 3.0 V to 5.5 V VDD; −40 °C to +85 °C operating range; ESD rated >2000 V HBM, >1000 V CDM; JEDEC JESD78 Class II latch-up compliant. |
| Package | TSSOP28 (SOT361-1), 4.4 mm body width, lead pitch 0.65 mm; RoHS-compliant, halogen-free. |
| Control Logic | Software Reset (SWRST) via I²C mimics Power-On Reset; Auto-Increment modes support sequential register writes for bulk configuration. |
Pinout & Package
TSSOP28 package (SOT361-1), 28-pin plastic thin shrink small outline, 4.4 mm body width, 0.65 mm lead pitch. Pin 1 marked by bevelled corner; pin 10, 19, and 24 are GND in PCU9655PW variant, but only pin 6 and 15 serve as VSS in PCU9655PW1 variant - confirming distinct grounding layout per datasheet Figure 2b.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A4 | Hardware address inputs | Set unique 5-bit slave address (0–31); require external 10 kΩ pull-up/down for ESD robustness and deterministic boot behavior. |
| USCL / USDA | UFm serial clock/data inputs | 5 MHz unidirectional I²C bus lines; include internal noise filters; tolerate 5.5 V regardless of VDD level. |
| VDD / VSS | Power supply terminals | VDD accepts 3.0–5.5 V; VSS pins (6, 15 on PCU9655PW1) must be low-inductance connected to system ground plane. |
| LED0–LED15 | Open-drain LED driver outputs | Each sinks up to 100 mA; withstand 40 V when OFF; support daisy-chained high-side supplies for RGB/RGBA strings. |
| n.c. | No-connect terminals | Pins 24 and 25 on PCU9655PW1 are reserved and must remain unconnected; not internally bonded. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable output enable delay | 16-step offset (0–1.875 µs between channels) reduces inrush current and EMI during simultaneous LED turn-on sequences. |
| Multi-address group control | Four software-defined I²C addresses (All Call + three Sub Call) allow synchronized updates across subsets of devices without bus arbitration overhead. |
| Unique power-up Sub Call ID | Default ACh Sub Call address identifies the device as a 16-channel driver, enabling interoperability with other UFm LED controllers of differing channel counts. |
| Glitch-free initialization | Internal power-on reset ensures all LED outputs start OFF; no transient illumination occurs during power ramp-up or brownout recovery. |
| Thermal protection | Automatic shutdown activates when junction temperature exceeds safe limit; device resumes normal operation after cooling below hysteresis threshold. |
Applications
| RGB LED Status Indicators | Keypad Backlighting |
|---|---|
|
Use Scenario: Real-time status feedback using red/green/blue LEDs on industrial HMIs or medical device panels. IC Role / Device Role / Timing Role: PCU9655PW1,518 drives each color channel independently with synchronized group blinking to indicate alarm states. Use Value: 31.25 kHz individual PWM eliminates visible flicker; programmable group blink period enables standardized alert cadence across product families. |
Use Scenario: Uniform backlighting for membrane keypads in handheld test equipment or portable diagnostics tools. IC Role / Device Role / Timing Role: PCU9655PW1,518 delivers consistent luminance across 16 keys using group PWM dimming while maintaining low quiescent current. Use Value: 122 Hz fixed-group dimming avoids beat frequencies with display refresh rates; 100 mA per channel supports high-efficiency white LEDs at full brightness. |
| Amusement Lighting Effects | LED Display Segments |
|
Use Scenario: Dynamic color sequencing and pulsing effects in arcade cabinets or interactive exhibits. IC Role / Device Role / Timing Role: PCU9655PW1,518 executes rapid brightness transitions across multiple RGBA LEDs using Auto-Increment register writes. Use Value: 5 MHz UFm bus enables sub-millisecond frame updates; 16-channel parallel control eliminates microcontroller polling overhead. |
Use Scenario: Driving discrete LED segments in segmented alphanumeric displays for instrumentation dashboards. IC Role / Device Role / Timing Role: PCU9655PW1,518 manages segment on/off states and intensity grading via LEDOUTx and PWMx registers. Use Value: Per-segment 8-bit brightness control allows calibrated grayscale rendering; open-drain outputs simplify connection to common-anode display architectures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC59401PWP | 40 V tolerant, 16-channel, but uses dot-correction + grayscale PWM (12-bit + 6-bit), no group blink; SPI interface instead of I²C. | Lacks programmable group blink and UFm speed; better suited for precision grayscale video displays than dynamic UI indicators. | Select TLC59401PWP when higher PWM resolution and dot correction are required for analog-like intensity linearity. |
| PCA9635PW | Same 16-channel, 100 mA, TSSOP28 package, and I²C interface, but Standard-mode (400 kHz), no UFm; group PWM fixed at 24 Hz. | Lower bus speed limits update rate; fixed 24 Hz group frequency restricts blink pattern flexibility compared to PCU9655PW1,518's 15 Hz–16.8 s range. | Choose PCA9635PW where cost sensitivity outweighs need for high-speed updates or wide blink period tuning. |
Compared with TLC59401PWP and PCA9635PW, the PCU9655PW1,518 uniquely combines 5 MHz UFm speed, fully programmable group blink timing, and hardware address scalability for dense multi-driver systems-making it optimal for responsive, visually rich embedded UIs.
Availability
PCU9655PW1,518 is available at Aetrix Electronics and suitable for RGB status indicators, keypad backlights, amusement lighting effects, and segmented LED displays requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for PCU9655PW1,518 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 secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in mixed-signal IC design and embedded processing.
The PCU9655PW1,518 belongs to NXP's Ultra Fast-mode LED driver family, engineered specifically for high-refresh-rate, multi-color UI lighting where deterministic timing, low EMI, and scalable bus architecture are critical design requirements.
FAQ
What is the maximum I²C bus speed supported by the PCU9655PW1,518?
The PCU9655PW1,518 supports Ultra Fast-mode (UFm) I²C operation up to 5 MHz. This is a write-only unidirectional interface with no read-back capability. External pull-up resistors must be used on USDA and USCL lines, and address pins A0–A4 require external biasing for reliable communication at this speed.
Does the PCU9655PW1,518 support both dimming and blinking on the same LED channel?
Yes, the PCU9655PW1,518 supports combined dimming and blinking on any LED channel configured with LDRx = 11 (LEDOUTx register). In this mode, the individual 31.25 kHz PWM sets base brightness while the group PWM (via GRPPWM and GRPFREQ) applies synchronized blink or dim modulation - enabling effects like pulsing amber alerts or breathing RGB transitions.
How many PCU9655PW1,518 devices can share the same UFm bus?
Up to 32 PCU9655PW1,518 devices can coexist on a single UFm bus using the five hardware address pins (A0–A4). Each device receives a unique 5-bit address, and software-configurable Sub Call and All Call addresses further enable grouped command broadcasting without address conflicts.
What is the purpose of the OFFSET register in the PCU9655PW1,518?
The OFFSET register (address 3Ah) introduces programmable turn-on delay between successive LED outputs (0–15 × 125 ns steps). This staggers channel activation to reduce peak inrush current on VDD and suppress conducted EMI - especially valuable in battery-powered or noise-sensitive applications using the PCU9655PW1,518.
Is the PCU9655PW1,518 compatible with standard I²C masters?
The PCU9655PW1,518 requires a UFm-capable I²C master supporting 5 MHz clock rates and write-only protocol compliance. Standard-mode (100 kHz) or Fast-mode (400 kHz) masters cannot drive it at full speed. However, its slave address format and register map are I²C-standard compliant - only timing and directionality differ.
PCU9655PW1,518 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 16
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 40V
- Current - Output / Channel:
- 100mA
- Frequency:
- -
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSSOP
PCU9655PW1,518 FAQ
1.How can I place an order for PCU9655PW1,518 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCU9655PW1,518 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 PCU9655PW1,518 reliable?
The price and inventory of PCU9655PW1,518 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCU9655PW1,518 is usually 5 days.
3.What payment methods are accepted for PCU9655PW1,518?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCU9655PW1,518 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCU9655PW1,518?
PCU9655PW1,518 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCU9655PW1,518 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 PCU9655PW1,518?
For technical support, including PCU9655PW1,518 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCU9655PW1,518 requirements.
6.How does Aetrix verify that PCU9655PW1,518 is sourced from the original manufacturer or authorized distributors?
All PCU9655PW1,518 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 PCU9655PW1,518 meets industry standards.
7.What is the process for return or replacement of PCU9655PW1,518?
All PCU9655PW1,518 units undergo pre-shipment inspection (PSI). If there is an issue with PCU9655PW1,518, 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 PCU9655PW1,518 part is unused and in its original packaging.
Return procedure for PCU9655PW1,518:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCU9655PW1,518 Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
