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NXP Semiconductors PCF85176T/1,118
- Part No.:
- PCF85176T/1,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Display Drivers
- Package:
- 56-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
PCF85176T/1,118.pdf
- Description:
- IC DRVR 40 SEGMENT 56TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,716
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Product details
Overview
PCF85176T/1,118 from NXP Semiconductors is a 40 × 4 universal LCD driver IC for low-multiplex-rate displays, supporting static, 2-, 3-, or 4-backplane configurations with selectable 1/2 or 1/3 bias. It integrates I²C-bus interface (400 kHz), 40 × 4-bit display RAM, internal LCD bias generation, and operates from 1.8 V to 5.5 V logic supply and up to 6.5 V VLCD. It drives up to 160-segment LCDs in industrial instrumentation panels.
For engineers reviewing the PCF85176T/1,118 datasheet, PCF85176T/1,118 pinout, PCF85176T/1,118 application, or PCF85176T/1,118 equivalent, key selection criteria include multiplex mode flexibility (static to 1:4), dual-supply capability (independent VDD/VLCD), auto-incremented RAM addressing, bank-switching for blinking control, and TSSOP56 package compatibility with space-constrained embedded UI designs.
Technical Context
The PCF85176T/1,118 implements a dedicated LCD controller core with hardware subaddressing and display memory bank switching for static and duplex drive modes. Its I²C interface uses continuation-bit command framing (C-bit) to distinguish control bytes from display data, minimizing bus overhead during RAM writes.
It features an internal oscillator enabled via OSC–VSS connection, with CLK output usable for cascading multiple devices. The LCD voltage selector dynamically configures backplane waveforms per selected drive mode (e.g., 1:4 multiplex with 1/3 bias yields Von(RMS) = 0.577 × VLCD and Voff(RMS) = 0.333 × VLCD), while the bias generator uses a switched impedance divider for 1/2 or 1/3 fractional biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Display Drive Capability | Up to 40 segments × 4 backplanes = 160 elements; supports static, 1:2, 1:3, or 1:4 multiplex LCDs |
| I²C Interface Speed | 400 kHz maximum - enables fast display updates without MCU resource contention |
| Logic Supply Range | 1.8 V to 5.5 V - compatible with modern low-voltage microcontrollers and mixed-voltage systems |
| LCD Supply Range (VLCD) | 2.5 V to 6.5 V - supports low-threshold, guest-host, and high-threshold twisted nematic LCDs |
| Display RAM | 40 × 4-bit static RAM - stores full segment state per backplane row; enables flicker-free static/duplex operation |
| Bias Configuration | Selectable 1/2 or 1/3 bias (static mode excludes bias selection) - matches LCD module electro-optical requirements |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial and automotive cabin environments |
Pinout & Package
PCF85176T/1,118 is housed in a plastic thin shrink small outline package (TSSOP56) with 56 leads, body width 6.1 mm (SOT364-1). Pin pitch is 0.5 mm; exposed pad optional per manufacturer mechanical drawings.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDA (Pin 44) | I²C serial data line | Open-drain bidirectional interface; requires external pull-up; handles command/data transfers with C-bit protocol |
| SCL (Pin 45) | I²C serial clock input | Master-generated clock up to 400 kHz; synchronizes all I²C transactions including auto-incremented RAM writes |
| BP0–BP3 (Pins 56, 1, 2, 3) | LCD backplane outputs | Drive complementary waveforms per selected multiplex mode; BP0–BP3 may be paralleled in static mode for higher current |
| S0–S39 (Pins 4–43) | LCD segment outputs | 40 dedicated CMOS drivers; each maps directly to one column of 40 × 4-bit display RAM |
| VLCD (Pin 55) | LCD supply voltage | Independent analog rail (2.5–6.5 V); powers internal bias generator and segment/backplane output stages |
| OSC (Pin 49) | Oscillator enable | Tied to VSS to enable internal RC oscillator; tied to VDD to accept external clock on CLK pin |
| SYNC (Pin 46) | Cascade synchronization | Input/output for timing alignment across multiple PCF85176 devices in large-display systems |
Key Features
| Feature | Design Value |
|---|---|
| Hardware subaddressing | 3-bit A[2:0] inputs allow up to 8 device-select subaddresses per I²C address, simplifying multi-driver system configuration |
| Display memory bank switching | Enables seamless static/duplex blinking by toggling between RAM banks at blink frequency - no host intervention required |
| Versatile blinking modes | Supports full-display blink (via E-bit toggle) or selective segment blink (via bank swap) in static/1:2 modes; configurable blink frequencies derived from fCLK |
| No external components required | Integrated bias generator, oscillator, and level-shifting eliminate need for resistors, capacitors, or external clocks in basic configurations |
| Cascadable architecture | SYNC and CLK pins enable synchronous chaining of up to 64 devices (2,560 segments), maintaining frame timing integrity across large displays |
Applications
| Industrial Control Panel | Medical Device Display |
|---|---|
Use Scenario: Front-panel LCD in programmable logic controller (PLC) housing with 4-digit numeric readout and status icons. IC Role / Device Role / Timing Role: Primary LCD driver managing 16-character alphanumeric display using 1:4 multiplex mode and 1/3 bias. Use Value: Reduces MCU GPIO and timing overhead via I²C interface and auto-incremented RAM writes; independent VLCD rail ensures stable contrast across temperature. |
Use Scenario: Battery-powered portable blood glucose meter with 14-segment alphanumeric display and low-power sleep mode. IC Role / Device Role / Timing Role: Low-quiescent-current LCD driver operating from 3.3 V logic and 5.0 V VLCD, configured for static drive with 20-segment layout. Use Value: 1.8 V minimum VDD enables direct connection to Li-ion battery (3.0–4.2 V); internal bias generator eliminates external resistor network, saving board area and BOM cost. |
| Automotive HVAC Interface | Smart Energy Meter Display |
Use Scenario: Dashboard-mounted climate control unit with segmented temperature, fan speed, and mode indicators. IC Role / Device Role / Timing Role: Cascaded LCD driver (2× PCF85176T/1,118) driving 80-segment display using SYNC-synchronized 1:2 multiplex mode. Use Value: SYNC pin ensures frame-aligned updates across both devices, eliminating visual tearing; −40 °C to +85 °C rating meets automotive ambient requirements. |
Use Scenario: DIN-rail mounted electricity meter with 7-segment numeric display and tariff indicator LEDs driven via segment outputs. IC Role / Device Role / Timing Role: Static-mode LCD driver providing constant-on segment drive for 5-digit kWh counter with independent VLCD regulation. Use Value: Static drive mode delivers highest RMS on-voltage (Von(RMS) = VLCD), maximizing contrast for readability in variable lighting; no external clock needed due to integrated oscillator. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCF85176T/1Y | Identical functionality and pinout; dry-pack packaging vs. non-dry-pack for PCF85176T/1,118 | Same electrical and thermal specs; preferred for moisture-sensitive assembly processes requiring MSL1 handling | Select PCF85176T/1Y when JEDEC J-STD-020 compliance and extended floor life are required |
| PCF85176H/1,518 | TQFP64 package (10 × 10 mm) vs. TSSOP56 (6.1 mm width); identical die and electrical behavior | Higher pin count allows easier probing and thermal relief; less suitable for ultra-compact layouts | Choose PCF85176H/1,518 for prototyping, test fixtures, or applications needing enhanced thermal dissipation |
Compared with PCF85176T/1,118, PCF85176T/1Y offers identical performance in a moisture-safe dry pack, while PCF85176H/1,518 provides the same functionality in a larger TQFP package better suited for manual assembly and thermal management - neither requires PCB redesign.
Availability
PCF85176T/1,118 is available at Aetrix Electronics and suitable for industrial control panels, medical device displays, automotive HVAC interfaces, and smart energy meter applications requiring stable component supply across extended product lifecycles.
Supply support for PCF85176T/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 display driver technologies.
The PCF85176T/1,118 belongs to NXP's legacy LCD peripheral driver family, designed specifically for cost-sensitive, low-power embedded systems requiring flexible, self-contained LCD interfacing without external biasing or timing components.
FAQ
What is the maximum number of LCD segments the PCF85176T/1,118 can drive?
The PCF85176T/1,118 drives up to 40 segments across 4 backplanes, supporting a total of 160 LCD elements. In static mode, it drives 40 segments with one backplane; in 1:4 multiplex mode, it drives 40 segments × 4 backplanes = 160 elements. Cascading multiple PCF85176T/1,118 devices extends this to 2,560 segments.
Does the PCF85176T/1,118 require external components for basic LCD operation?
No - the PCF85176T/1,118 requires no external components for core operation. Its integrated LCD bias generator, internal oscillator (enabled by OSC–VSS), and I²C interface eliminate the need for external resistors, capacitors, or clock sources. Only VDD, VSS, VLCD, SDA, SCL, and LCD connections are mandatory.
How does the PCF85176T/1,118 handle display blinking in static versus multiplexed modes?
In static and 1:2 multiplex modes, the PCF85176T/1,118 uses alternate RAM bank switching for true hardware blinking - no host CPU involvement. In 1:3 and 1:4 modes, blinking is implemented by software-controlled RAM updates at fixed intervals since no alternate banks are available. Blink frequency is derived from the system clock (fCLK).
Can the PCF85176T/1,118 operate with different supply voltages for logic and LCD sections?
Yes - the PCF85176T/1,118 supports independent supplies: VDD (1.8–5.5 V) for logic and I²C interface, and VLCD (2.5–6.5 V) for LCD bias and output stages. This allows optimization of contrast and power efficiency - e.g., 3.3 V VDD for MCU compatibility and 5.0 V VLCD for high-threshold TN LCDs.
What is the function of the SYNC pin on the PCF85176T/1,118?
The SYNC pin on the PCF85176T/1,118 provides cascade synchronization across multiple devices. When used as an input, it aligns frame timing between daisy-chained PCF85176T/1,118 units; when used as an output, it drives downstream devices' SYNC inputs. This ensures simultaneous LCD updates and eliminates visual artifacts in large-display systems.
PCF85176T/1,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 56-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Display Type:
- LCD
- Configuration:
- 40 Segment
- Interface:
- I2C
- Digits or Characters:
- -
- Current - Supply:
- 20 µA
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-TSSOP
PCF85176T/1,118 FAQ
1.How can I place an order for PCF85176T/1,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCF85176T/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 PCF85176T/1,118 reliable?
The price and inventory of PCF85176T/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 PCF85176T/1,118 is usually 5 days.
3.What payment methods are accepted for PCF85176T/1,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCF85176T/1,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCF85176T/1,118?
PCF85176T/1,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCF85176T/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 PCF85176T/1,118?
For technical support, including PCF85176T/1,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCF85176T/1,118 requirements.
6.How does Aetrix verify that PCF85176T/1,118 is sourced from the original manufacturer or authorized distributors?
All PCF85176T/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 PCF85176T/1,118 meets industry standards.
7.What is the process for return or replacement of PCF85176T/1,118?
All PCF85176T/1,118 units undergo pre-shipment inspection (PSI). If there is an issue with PCF85176T/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 PCF85176T/1,118 part is unused and in its original packaging.
Return procedure for PCF85176T/1,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCF85176T/1,118 Tags
-
PCA8561AHN/AY
NXP Semiconductors
-
SN74LS47N
Texas Instruments
-
PCF85176T/1Y
NXP Semiconductors
-
PCF85176H/1,518
NXP Semiconductors
-
BU9796AMUV-E2
Rohm Semiconductor
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PCA85176H/Q900/1,5
NXP Semiconductors
-
PCF8537AH/1,518
NXP Semiconductors
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LM3914VX/NOPB
Texas Instruments
-
PCF85134HL/1,118
NXP Semiconductors
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AS1115-BSST
ams-OSRAM USA INC.
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PCA8534AH/Q900/1,5
NXP Semiconductors
-
LM3914V/NOPB
Texas Instruments
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