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NXP Semiconductors PCF8577CP/F3,112
- Part No.:
- PCF8577CP/F3,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Display Drivers
- Package:
- 40-DIP (0.600", 15.24mm)
- Datasheet:
-
PCF8577CP/F3,112.pdf
- Description:
- IC DRVR 32 SEGMENT 40DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,059
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Product details
Overview
PCF8577CP/F3,112 from NXP Semiconductors is an I²C-bus LCD segment driver supporting direct drive (32 segments) or duplex drive (64 segments), operating from 2.5 V to 6 V supply, with built-in single-pin oscillator and hardware subaddressing (A0/A1/A2). It serves as a low-power display controller in battery-powered instrumentation and industrial HMI panels.
For engineers reviewing the PCF8577CP/F3,112 datasheet, PCF8577CP/F3,112 pinout, PCF8577CP/F3,112 application, or PCF8577CP/F3,112 equivalent, key selection criteria include I²C slave address (0x74), segment drive capability per mode, oscillator component requirements (ROSC/COSC), and backplane signal routing in duplex configuration.
Technical Context
The PCF8577CP/F3,112 implements a segmented LCD driver architecture with dual-mode operation controlled by the MODE bit in its 9-byte register map: direct drive (MODE = 0) uses BP1 only and supports bank-switched 32-segment output via BANK A/B registers; duplex drive (MODE = 1) requires BP1 and BP2, maps all eight segment registers across both backplanes, and disables A2 subaddressing. Its I²C interface supports auto-incremented loading across device boundaries when subaddresses are contiguously assigned.
Hardware subaddress lines A0, A1, and A2 configure device addressing (0x74 base + 3-bit offset); A0 doubles as oscillator input (requiring external R/C network), while A2/BP2 serves dual function - as subaddress line in direct mode and second backplane output in duplex mode. Power-on reset clears all registers and sets outputs to VSS (master mode) or high-impedance (cascade mode).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| I²C Slave Address | Fixed 7-bit address 0x74 (1110100), enabling up to 8 devices on same bus using A0–A2 subaddressing |
| Segment Drive Capability | 32 segments in direct mode (single backplane), 64 segments in duplex mode (dual backplanes BP1/BP2) |
| Supply Voltage Range | 2.5 V to 6 V - supports wide-input battery and industrial rail systems without level-shifting |
| Oscillator Interface | Single-pin A0/OSC requiring external resistor (1 MΩ typical) and capacitor (680 pF typical) for LCD modulation at 65–120 Hz |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial and automotive cabin environments |
| Display Memory | Eight 8-bit segment registers organized in two banks (A/B); BANK bit selects active display bank in direct mode |
| ESD Protection | ±2000 V HBM - no diode clamp to VDD on SCL/SDA, enabling partial VDD shutdown without leakage path |
Pinout & Package
PCF8577CP/F3,112 is housed in a plastic very small outline package (VSO40) with 40 leads, compliant with SOT158-1 standard. Package dimensions: 10.2 mm × 5.3 mm × 1.8 mm (max height), 0.65 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| S1–S32 | Segment output drivers | Direct-drive LCD segment outputs; each sinks/source current per display waveform (VON(RMS) = VDD−VSS in direct mode) |
| BP1 | Backplane output / cascade sync input | Primary backplane signal in direct mode; cascaded sync input when configured as slave in multi-device system |
| A2/BP2 | Subaddress input / secondary backplane output | In direct mode: hardware address bit A2; in duplex mode: dedicated BP2 output - not used for addressing |
| VDD | Positive supply | 2.5 V to 6 V logic and driver supply; powers internal oscillator, I²C interface, and segment drivers |
| A1 | Hardware subaddress input | Static address bit (LOW/HIGH tied to VSS/VDD) - part of 3-bit subaddress determining device response to 0x74 base |
| A0/OSC | Oscillator input / subaddress bit | Shared pin: connects external R/C network for LCD clock generation; also functions as A0 subaddress bit when not oscillating |
| VSS | Ground supply | Reference for all logic, I²C signals, and LCD bias - must be common with VLCD to prevent display artifacts |
| SCL | I²C clock input | Open-drain input accepting standard I²C timing (fSCL ≤ 100 kHz); requires external pull-up to VDD |
| SDA | I²C data I/O | Open-drain bidirectional line; requires external pull-up; acknowledges control byte and segment data writes |
Key Features
| Feature | Design Value |
|---|---|
| Direct/duplex mode selection | Configurable via MODE bit in control register - enables flexible segment count scaling without hardware change |
| Auto-incremented segment loading | SBV increments after each byte write, allowing burst-loading of multiple registers or cross-device sequential addressing |
| Display memory switching | BANK bit toggles between two 8-byte banks (A/B) in direct mode - enables flicker-free page updates and animation buffering |
| I²C-bus output expander capability | Can drive 32 general-purpose outputs (S1–S32) in static mode - repurposed for non-LCD GPIO expansion in I²C systems |
| Power-on reset blanking | Resets all segment outputs to VSS and clears registers at power-up - prevents undefined display states during boot |
Applications
| Industrial Panel Meters | Portable Medical Devices |
|---|---|
|
Use Scenario: Digital multimeter or process indicator with 4-digit alphanumeric LCD requiring low-power, reliable segment control. IC Role / Device Role / Timing Role: Primary LCD segment driver managing 32 segments in direct mode; provides synchronized backplane (BP1) and modulated segment outputs via internal oscillator. Use Value: Eliminates external timing components and reduces PCB footprint versus discrete oscillator + shift-register solutions; supports battery life >1 year at 3 V due to <25 µA standby current. |
Use Scenario: Handheld blood glucose monitor with monochrome segment-based display and strict ESD immunity requirements. IC Role / Device Role / Timing Role: I²C-controlled LCD driver with ±2000 V HBM ESD protection on SCL/SDA; operates from single 3 V coin cell with no VDD-VLCD sequencing risk. Use Value: Meets IEC 60601-1 ESD robustness requirements; integrated power-on reset prevents erroneous readings during cold start. |
| Home Appliance Control Panels | Automotive Cabin Displays |
|
Use Scenario: Microwave oven or washing machine UI with 2-line character LCD and touch-sensitive overlay. IC Role / Device Role / Timing Role: Duplex-mode driver (64 segments) driving dual-backplane display; uses A0–A2 to coexist with other I²C peripherals (e.g., temperature sensor, keypad controller). Use Value: Reduces wiring complexity versus parallel-interface drivers; supports up to 256 segments via daisy-chained configuration (8× PCF8577C). |
Use Scenario: HVAC control panel in passenger compartment with ambient temperature range −40 °C to +85 °C. IC Role / Device Role / Timing Role: Industrial-grade LCD driver qualified for extended temperature operation; uses VSS-referenced oscillator to maintain stable fLCD across thermal extremes. Use Value: Maintains display contrast and update rate over full automotive temperature range without calibration; no external crystal required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD segment driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCF8574AT | 8-bit I²C port expander (no LCD-specific features); lacks oscillator, backplane outputs, and segment memory mapping | Only suitable for static GPIO expansion - cannot drive AC-coupled LCD segments or generate backplane waveforms | Select PCF8574AT only if driving LED indicators or relays, not LCDs; requires external timing and multiplexing logic |
| HT1621B | 32-segment LCD driver with built-in RC oscillator; uses 4-wire serial interface (not I²C); supports 1/2–1/4 bias | Requires custom serial protocol implementation; no hardware subaddressing - limits multi-display scalability | Choose HT1621B for cost-sensitive consumer products where I²C bus sharing is unnecessary and layout space allows 4-wire routing |
Compared with PCF8577CP/F3,112, PCF8574AT offers GPIO flexibility but zero LCD functionality, while HT1621B delivers integrated LCD drive at the cost of I²C compatibility and scalable multi-device addressing - making PCF8577CP/F3,112 optimal for expandable, standards-compliant industrial displays.
Availability
PCF8577CP/F3,112 is available at Aetrix Electronics and suitable for industrial panel meters, portable medical devices, home appliance control panels, and automotive cabin displays requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for PCF8577CP/F3,112 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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in mixed-signal interface ICs and human-machine interaction technologies.
The PCF8577C product line was designed specifically for low-power, I²C-based LCD segment driving in resource-constrained embedded systems - emphasizing minimal external components, robust ESD tolerance, and seamless integration into multi-peripheral microcontroller designs.
FAQ
What is the I²C slave address of the PCF8577CP/F3,112 and how is it configured?
The PCF8577CP/F3,112 has a fixed 7-bit I²C slave address of 0x74 (binary 1110100). Hardware subaddress lines A0, A1, and A2 allow up to eight devices to share the same bus by appending their 3-bit value to the base address. For example, A2=0, A1=1, A0=0 yields final address 0x76. The PCF8577CP/F3,112 responds only when its subaddress matches the three least-significant bits of the received address byte.
How does the PCF8577CP/F3,112 support both direct and duplex LCD drive modes?
The PCF8577CP/F3,112 selects drive mode via the MODE bit in its control register: MODE = 0 configures direct drive (32 segments, BP1 only), while MODE = 1 enables duplex drive (64 segments, BP1 + BP2). In direct mode, the BANK bit toggles between two 8-byte memory banks for flicker-free updates; in duplex mode, all eight registers are used and BANK is ignored. Pin A2/BP2 functions as subaddress input in direct mode and as BP2 output in duplex mode.
What external components are required for the oscillator in the PCF8577CP/F3,112?
The PCF8577CP/F3,112 requires an external resistor (ROSC) and capacitor (COSC) connected to the A0/OSC pin to form its built-in oscillator. Typical values are 1 MΩ and 680 pF, yielding a display frequency of 65–120 Hz. Both components must connect to the same VSS/VDD rails as the IC to ensure reliable startup. In multi-device systems, only one PCF8577CP/F3,112 should drive the oscillator; others enter cascade mode by tying A0/OSC to VDD or VSS.
Can the PCF8577CP/F3,112 be used as a general-purpose I²C I/O expander?
Yes, the PCF8577CP/F3,112 can operate as a 32-bit I²C output expander by disabling LCD modulation - set MODE = 0, tie A0/OSC to VDD or VSS (no R/C network), and connect BP1 to VSS. Segment outputs S1–S32 then behave as static CMOS outputs capable of sinking up to 0.3 mA each at VOL = 0.8 V (VDD = 5 V). This mode bypasses display timing but retains I²C addressability and register-based control.
What precautions are necessary to avoid LCD display artifacts with the PCF8577CP/F3,112?
To prevent unwanted LCD artifacts, VLCD and VDD must be powered on and off simultaneously - voltage sequencing (e.g., VLCD on while VDD is off) causes static charge buildup across the liquid crystal layer. Additionally, the IC must be shielded from ambient light exposure on all sides, as photogenerated carriers can disrupt internal logic. All SCL/SDA lines require proper pull-up resistors (typically 4.7 kΩ to VDD), and VSS must remain common between the driver and LCD glass.
PCF8577CP/F3,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 40-DIP (0.600", 15.24mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Display Type:
- LCD
- Configuration:
- 32 Segment
- Interface:
- I2C
- Digits or Characters:
- -
- Current - Supply:
- -
- Voltage - Supply:
- 2.5V ~ 6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 40-DIP
PCF8577CP/F3,112 FAQ
1.How can I place an order for PCF8577CP/F3,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCF8577CP/F3,112 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 PCF8577CP/F3,112 reliable?
The price and inventory of PCF8577CP/F3,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCF8577CP/F3,112 is usually 5 days.
3.What payment methods are accepted for PCF8577CP/F3,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCF8577CP/F3,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCF8577CP/F3,112?
PCF8577CP/F3,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCF8577CP/F3,112 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 PCF8577CP/F3,112?
For technical support, including PCF8577CP/F3,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCF8577CP/F3,112 requirements.
6.How does Aetrix verify that PCF8577CP/F3,112 is sourced from the original manufacturer or authorized distributors?
All PCF8577CP/F3,112 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 PCF8577CP/F3,112 meets industry standards.
7.What is the process for return or replacement of PCF8577CP/F3,112?
All PCF8577CP/F3,112 units undergo pre-shipment inspection (PSI). If there is an issue with PCF8577CP/F3,112, 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 PCF8577CP/F3,112 part is unused and in its original packaging.
Return procedure for PCF8577CP/F3,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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