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NXP Semiconductors PCF2112CT/1,118
- Part No.:
- PCF2112CT/1,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Display Drivers
- Package:
- 40-BSOP (0.295", 7.50mm Width)
- Datasheet:
-
PCF2112CT/1,118.pdf
- Description:
- IC DRVR 32 SEGMENT 40VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,693
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Product details
Overview
PCF2112CT/1,118 from NXP Semiconductors is a single-chip CMOS LCD driver IC designed for 1:1 multiplexed segment displays, supporting 32 LCD segments with 34-bit serial C-bus interface, 2.25–6.0 V supply range, and integrated oscillator. It operates in stand-alone mode or as master in expanded systems for multi-driver configurations.
For engineers reviewing the PCF2112CT/1,118 datasheet, PCF2112CT/1,118 pinout, PCF2112CT/1,118 application, or PCF2112CT/1,118 equivalent, this device is selected for low-power, serially controlled LCD modules in portable instrumentation, industrial HMIs, and battery-powered meters requiring precise segment drive timing and minimal external components.
Technical Context
The PCF2112CT/1,118 implements a dedicated C-bus protocol with DLEN/CLB/DATA signaling, uses a built-in oscillator (no external crystal required), and loads latches on DATA bit 33 HIGH followed by CLB pulse 35. Its 1:1 multiplex architecture eliminates frame rate reduction inherent in higher-ratio drivers, enabling stable static-segment biasing.
Bus control logic validates leading zero, bit count, and signal integrity during transmission; invalid frames are discarded without latch update. Output impedance is characterized at 1–7 kΩ for segments and 0.5–5.0 kΩ for backplane pins under 5 V supply, supporting direct connection to typical passive LCD glass.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.25 V to 6.0 V - Enables operation from single Li-ion, dual alkaline, or regulated 3.3/5 V rails without level-shifting. |
| LCD Segments | 32 - Drives full alphanumeric displays (e.g., 4-digit + status symbols) without external segment expansion. |
| Multiplex Rate | 1:1 - Delivers full segment voltage swing per cycle; eliminates flicker and contrast loss in static-segment applications. |
| Word Length | 34 bits - Encodes 32 segment states plus 2 control bits (DATA[33] load trigger and reserved bit), ensuring deterministic frame loading. |
| Display Frequency | 30–50 Hz (CO = 1.5 nF) - Matches standard LCD glass requirements while maintaining low power consumption (<50 µA typical). |
| Operating Temp | −40 °C to +85 °C - Qualified for industrial and automotive cabin environments without derating. |
| Package | VSO40 (SOT158-1) - 40-pin very small outline package with 0.5 mm pitch, optimized for compact PCB layouts. |
Pinout & Package
PCF2112CT/1,118 is housed in a plastic very small outline package (VSO40, SOT158-1) with 40 leads, body width 5.4 mm, and 0.5 mm lead pitch. Pin numbering follows standard JEDEC orientation with Pin 1 marked by dot or bevel.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLB (Pin 1) | C-bus clock burst input | Synchronizes data transfer; rising edge triggers shift register-to-latch transfer after valid frame detection. |
| VDD (Pin 2) | Positive supply rail | Power source for internal logic and output drivers; must be decoupled locally with ≥100 nF ceramic capacitor. |
| OSC (Pin 3) | Oscillator input | Connects to internal oscillator circuit; tied to VSS to enable master-mode expansion (not used in stand-alone config). |
| VSS (Pin 4) | Ground reference | Common return for all internal circuits and LCD outputs; requires low-impedance PCB plane connection. |
| S1–S32 (Pins 17–40) | Segment driver outputs | Drive individual LCD segment electrodes; each provides 1–7 kΩ output impedance at 5 V for stable bias control. |
| BP1/BP2 (Pins 37–38) | Backplane driver outputs | Provide complementary AC drive waveforms; BP1 active in master mode, BP2 unused in PCF2112C (n.c. in this variant). |
| DATA (Pin 39) | C-bus serial data input | Accepts 34-bit frame; bit 33 high enables latch load; no pull-up/pull-down required due to internal bus control logic. |
| DLEN (Pin 40) | Data enable input | Active-low signal initiating frame reception; must meet tSUEN ≥1 µs setup time before first CLB edge. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated oscillator | Eliminates external crystal or RC network; reduces BOM count and layout area while ensuring consistent timing across temperature. |
| 1:1 multiplex architecture | Delivers full RMS voltage to each segment per frame, enabling high-contrast static displays without flicker or ghosting artifacts. |
| C-bus serial interface | 3-wire protocol (DLEN/CLB/DATA) minimizes MCU GPIO usage and simplifies routing on dense PCBs versus parallel interfaces. |
| Power-on reset (POR) | Resets internal logic when VDD drops below 1.0–1.6 V threshold, preventing undefined display states during brown-out conditions. |
| Bus error detection | Validates leading zero, bit count, and signal integrity; discards corrupted frames without updating display, ensuring visual reliability. |
Applications
| Portable Medical Devices | Industrial Panel Meters |
|---|---|
|
Use Scenario: Battery-powered blood glucose monitors and handheld diagnostic tools with 4-digit LCD readouts. IC Role / Device Role / Timing Role: Primary segment driver controlling static-segment LCD glass using 1:1 multiplexing and internal oscillator timing. Use Value: Enables >5-year battery life via sub-50 µA supply current and eliminates external timing components, reducing system cost and size. |
Use Scenario: DIN-rail mounted voltage/current meters with alphanumeric status indicators and measurement digits. IC Role / Device Role / Timing Role: Stand-alone LCD controller interfacing directly to microcontroller over C-bus, driving 32-segment display with stable bias. Use Value: Provides ESD-hardened (±2000 V HBM), wide-temp (−40 °C to +85 °C) operation suitable for uncontrolled industrial enclosures. |
| Consumer Remote Controls | Automotive Cabin Displays |
|
Use Scenario: IR remotes with multi-function LCD screens showing channel, volume, and battery status. IC Role / Device Role / Timing Role: Low-voltage LCD driver operating from 2.25 V alkaline supply, managing segment updates via serial C-bus bursts. Use Value: Maintains display clarity down to 2.25 V VDD, avoiding premature shutdown during battery depletion. |
Use Scenario: HVAC control panels and seat memory interfaces with segmented LCDs in vehicle cabins. IC Role / Device Role / Timing Role: Master-mode LCD driver synchronizing multiple PCF2112C units for larger displays using shared OSC/VSS lines. Use Value: Supports expansion up to total segment count limited only by BP drive capability-enables scalable display solutions without redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCF2111CT/1,118 | 64-segment capacity, 1:2 multiplex, 34-bit word length, same VSO40 package and C-bus interface. | Supports larger displays but requires frame-doubling for static segments, increasing MCU overhead and potential flicker risk. | Select when >32 segments are needed and 1:2 multiplex is acceptable; verify LCD glass compatibility with reduced RMS voltage. |
| PCF2100CT/1,118 | 40-segment capacity, 1:2 multiplex, 22-bit word length, SO28 (SOT136-1) package - different pinout and footprint. | Requires PCB redesign due to 28-pin SOIC vs. 40-pin VSO40; lower segment count but simpler timing (22-bit frame). | Choose only if existing SO28 layout exists; not drop-in compatible - incompatible pin count, package, and multiplex architecture. |
Compared with PCF2112CT/1,118, the PCF2111CT/1,118 offers higher segment density at the cost of 1:2 multiplexing complexity, while the PCF2100CT/1,118 demands mechanical redesign and sacrifices serial word efficiency for legacy SOIC compatibility.
Availability
PCF2112CT/1,118 is available at Aetrix Electronics and suitable for portable medical devices, industrial panel meters, and automotive cabin displays requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for PCF2112CT/1,118 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 company specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with leadership in interface, power management, and mixed-signal ICs.
The PCF21xxC family was developed specifically for low-power, serially controlled LCD segment driving in space-constrained, battery-sensitive applications - emphasizing integration, reliability, and ease of MCU integration.
FAQ
What is the function of the OSC pin on the PCF2112CT/1,118?
The OSC pin on the PCF2112CT/1,118 connects to the internal oscillator circuit. When left unconnected or tied to VSS, it enables the built-in oscillator for standalone operation. In master-mode expansion, connecting OSC to VSS allows synchronization of multiple PCF2112CT/1,118 units - but the PCF2112CT/1,118 can only serve as a master for identical variants, not as a slave.
Does the PCF2112CT/1,118 support 1:2 or higher multiplex ratios?
No, the PCF2112CT/1,118 is specified exclusively for 1:1 multiplex operation, as confirmed in the datasheet's Features section and functional description. It drives 32 segments with full-cycle biasing - unlike the PCF2111CT/1,118 (1:2) or PCF2100CT/1,118 (1:2). Using it in higher-ratio configurations is not supported and may cause incorrect display behavior.
How many bits does the C-bus frame contain for the PCF2112CT/1,118?
The PCF2112CT/1,118 uses a fixed 34-bit C-bus frame, as stated in the Features section and verified in Section 7.3 (Functional Description). Bit 33 serves as the latch load trigger (HIGH = load), while bits 0–32 encode segment states and control - matching the 32-segment capability plus two control bits.
Can the PCF2112CT/1,118 be used in an expanded system with other PCF21xxC variants?
The PCF2112CT/1,118 can act only as a master for other PCF2112CT/1,118 units in expansion mode (per Section 7.7), using shared OSC and VSS lines. It cannot synchronize or drive PCF2100C or PCF2111C devices due to differing multiplex rates, segment counts, and timing - attempting cross-variant expansion will result in display corruption or non-operation.
What is the maximum display frequency supported by the PCF2112CT/1,118?
The PCF2112CT/1,118 supports a display frequency of 30–50 Hz, specified for CO = 1.5 nF load (Table 7, fLCD row). This range ensures stable LCD contrast and response while maintaining low power draw (<50 µA). Frequency varies with supply voltage and capacitive load - exceeding 50 Hz may reduce segment voltage margin and increase flicker risk.
PCF2112CT/1,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 40-BSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Display Type:
- LCD
- Configuration:
- 32 Segment
- Interface:
- Serial
- Digits or Characters:
- -
- Current - Supply:
- 20 µA
- Voltage - Supply:
- 2.25V ~ 6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-VSO
PCF2112CT/1,118 FAQ
1.How can I place an order for PCF2112CT/1,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCF2112CT/1,118 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 PCF2112CT/1,118 reliable?
The price and inventory of PCF2112CT/1,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCF2112CT/1,118 is usually 5 days.
3.What payment methods are accepted for PCF2112CT/1,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCF2112CT/1,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCF2112CT/1,118?
PCF2112CT/1,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCF2112CT/1,118 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 PCF2112CT/1,118?
For technical support, including PCF2112CT/1,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCF2112CT/1,118 requirements.
6.How does Aetrix verify that PCF2112CT/1,118 is sourced from the original manufacturer or authorized distributors?
All PCF2112CT/1,118 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 PCF2112CT/1,118 meets industry standards.
7.What is the process for return or replacement of PCF2112CT/1,118?
All PCF2112CT/1,118 units undergo pre-shipment inspection (PSI). If there is an issue with PCF2112CT/1,118, 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 PCF2112CT/1,118 part is unused and in its original packaging.
Return procedure for PCF2112CT/1,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCF2112CT/1,118 Tags
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PCA8561AHN/AY
NXP Semiconductors
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SN74LS47N
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PCF85176T/1Y
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PCF8537AH/1,518
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LM3914VX/NOPB
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PCF85134HL/1,118
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AS1115-BSST
ams-OSRAM USA INC.
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PCA8534AH/Q900/1,5
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