My Inquiry
My Account
NXP Semiconductors PCF8576T,118
- Part No.:
- PCF8576T,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Display Drivers
- Package:
- 56-BSOP (0.435", 11.05mm Width)
- Datasheet:
-
PCF8576T,118.pdf
- Description:
- IC DRVR 8 SEGMENT 56VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,159
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PCF8576T,118 from NXP Semiconductors (formerly Philips) is a universal LCD controller/driver IC designed for low-multiplex-rate liquid crystal displays. It supports static or 2/3/4-backplane multiplexing, delivers up to 40 segment outputs and 4 backplane outputs, features an integrated I²C-bus interface, internal LCD bias generation, and operates across a wide 2 V to 9 V supply range - enabling use in battery-powered instrumentation, automotive dashboard displays, and industrial control panels.
For engineers reviewing the PCF8576T,118 datasheet, PCF8576T,118 pinout, PCF8576T,118 application, or PCF8576T,118 equivalent, key selection considerations include its 56-pin VSO56 package, 40 × 4-bit display RAM, selectable LCD drive modes (static, 1:2, 1:3, 1:4), power-saving mode for ultra-low current draw, and cascading capability with PCF8566 for large-panel systems.
Technical Context
The PCF8576T,118 implements a fully integrated LCD drive architecture with hardware-controlled multiplex timing, auto-incremented display RAM addressing, and synchronized output bank selection. Its I²C-bus controller handles slave address decoding (via SA0–A2 pins), command interpretation (MODE SET, BLINK, LOAD DATA POINTER), and display data loading without CPU intervention during frame updates.
Internal bias generation uses a three-resistor divider between VDD and VLCD, with programmable 1/2 or 1/3 bias levels matched to selected multiplex configuration. The oscillator supports both internal (ROSC-based) and external clock sources, with frame frequency derived as fCLK/2880 (normal mode) or fCLK/480 (power-saving mode).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Display Drive Capability | Up to 40 segments and 4 backplanes; supports static, 1:2, 1:3, or 1:4 multiplexing - enables 20× 7-segment digits or 10× 15-segment alphanumeric characters. |
| Interface Protocol | I²C-bus compliant (100 kHz max); uses SDA/SCL pins with hardware subaddressing (A0–A2) and slave address input (SA0) - allows up to 8 devices on same bus. |
| Display Memory | 40 × 4-bit static RAM; bit-to-backplane mapping enables time-multiplexed segment activation - eliminates need for external memory or microcontroller bit-banging. |
| Supply Voltage Range | VDD = 2 V to 9 V; VLCD independently configurable - supports low-threshold (2 V) and high-threshold (automotive TN) LCDs without external level shifters. |
| Power-Saving Mode | Reduces internal clock division ratio by 6×; lowers supply current significantly - extends battery life in portable meters and telephony handsets. |
| Cascading Support | Synchronous cascade via SYNC pin; CLK output drives downstream PCF8566 devices - scales to 2560 segments using multiple PCF8576T,118 units. |
Pinout & Package
PCF8576T,118 is housed in a space-saving 56-lead plastic Very Small Outline (VSO56) package (SOT190-1), optimized for plane wiring in single- and multi-device LCD modules. Pin pitch is 0.5 mm; body dimensions are 13.6 mm × 5.7 mm × 1.8 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDA (Pin 1) | I²C serial data bidirectional line | Open-drain interface requiring external pull-up; handles command/data transfer and ACK/NACK signaling per I²C protocol. |
| SCL (Pin 2) | I²C serial clock input | Master-generated clock synchronizes all data transfers; device samples SDA on rising edge and drives SDA on falling edge. |
| SYNC (Pin 3) | Cascade synchronization I/O | Outputs frame sync pulse when master; inputs sync signal when slave - ensures phase-aligned LCD updates across daisy-chained devices. |
| CLK (Pin 4) | External clock input / internal clock output | Configurable: connects to VDD for external clock mode; connects to VSS + Rosc for internal oscillator - provides clock to downstream PCF8566 in cascade. |
| VDD (Pin 5) | Logic supply voltage | Powers internal logic, I²C interface, and RAM; independent from VLCD - enables mixed-voltage system design. |
| OSC (Pin 6) | Oscillator connection | Connect to VSS to enable internal RC oscillator; connect to VDD to select external clock source - determines timing reference for all LCD waveforms. |
| A0–A2 (Pins 7–9) | I²C subaddress inputs | Hardware-configured 3-bit address extension; selects one of eight subaddress blocks within display RAM - enables efficient partial updates. |
| SA0 (Pin 10) | Slave address bit 0 | Combines with fixed 7-bit I²C address (0x70) to form full 8-bit address - allows two PCF8576T,118 devices on same bus with different SA0 states. |
| VSS (Pin 11) | Logic ground reference | Common return for digital circuitry; must be isolated from analog LCD ground if noise-sensitive applications require separate grounding. |
| VLCD (Pin 12) | LCD supply voltage | Reference for internal bias generator; sets Vop = VDD − VLCD - adjustable to optimize contrast across temperature and LCD type. |
| BP0–BP3 (Pins 13–16) | LCD backplane outputs | Drive complementary waveforms to LCD backplanes; outputs can be paralleled (e.g., BP0/BP2 in 1:2 mode) to increase current drive capability. |
| S0–S39 (Pins 17–56) | LCD segment outputs | Direct-drive outputs for LCD segments; open-circuit unused pins - no external drivers required for standard LCD loads. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LCD bias generator | Three-resistor divider with switchable center resistor enables precise 1/2 or 1/3 bias voltage selection - eliminates external bias network and trimming components. |
| Auto-incremented RAM addressing | Data pointer advances by 8 (static), 4 (1:2), or 2 (1:4) addresses per byte - simplifies firmware by removing manual address calculation during bulk display updates. |
| Bank-selectable display memory | Separate input/output bank selectors allow dual-buffer operation in static and 1:2 modes - enables flicker-free display transitions via RAM bank swap at blink rate. |
| Versatile blinking control | Global blink at 0.5/1/2 Hz or arbitrary segment blink via RAM bank switching - reduces MCU interrupt load and eliminates software-based blink timing loops. |
| Chip-on-glass compatibility | Optimized pinout and low external component count (max one Rosc resistor) - supports direct integration into COG LCD modules with minimal PCB area. |
Applications
| Industrial Panel Meters | Automotive Instrument Clusters |
|---|---|
Use Scenario: Digital panel meter displaying voltage, current, or temperature readings in factory automation cabinets. IC Role / Device Role / Timing Role: Primary LCD controller/driver handling 16-digit numeric display with static or 1:2 multiplexing; manages display RAM updates via I²C from host MCU. Use Value: Eliminates need for discrete bias resistors and segment drivers; 2–9 V VDD range accommodates 3.3 V or 5 V system rails while supporting high-contrast automotive-grade LCDs. | Use Scenario: Analog-style speedometer and fuel gauge with segmented bar indicators in vehicle dashboards. IC Role / Device Role / Timing Role: Dual-role driver for both static indicator symbols and 1:4 multiplexed numeric fields; uses power-saving mode during ignition-off to minimize battery drain. Use Value: Internal 1/3-bias generation and temperature-compensated VLCD input ensure stable contrast across −40°C to +85°C operating range without external compensation circuitry. |
| Portable Medical Devices | Telecom Handsets & Modems |
Use Scenario: Blood glucose monitor or pulse oximeter with alphanumeric LCD showing measurement results and status icons. IC Role / Device Role / Timing Role: Interface between low-power ARM Cortex-M0+ MCU and 10-character 14-segment display; leverages I²C auto-addressing to reduce firmware overhead. Use Value: 40 × 4-bit RAM stores full display state; power-saving mode cuts supply current below 1 µA - extends coin-cell battery life beyond 12 months. | Use Scenario: DSL modem or VoIP phone with 2-line character LCD showing connection status, IP address, and caller ID. IC Role / Device Role / Timing Role: Cascaded LCD driver (with second PCF8576T,118) driving 40-segment top line and 40-segment bottom line - synchronized via SYNC pin. Use Value: Hardware subaddressing (A0–A2) allows independent update of each line without MCU intervention; reduces I²C bus traffic by 50% versus discrete drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD controller/driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCF8566T,118 | 24-segment, 4-backplane driver; shares identical I²C protocol, pinout compatibility, and cascade interface - but lower segment count. | Targeted for smaller displays (e.g., 12-digit numeric); lacks 40-segment capacity and 1:3/1:4 multiplex support of PCF8576T,118. | Select when display size is ≤12 digits and board space constraints favor smaller VSO44 package (44-pin vs. 56-pin). |
| HD44780U | Parallel 8-bit interface (no I²C); requires 11 control/data lines vs. 2-wire I²C; no internal bias generator - needs external resistor network. | Designed for character-based LCDs only (e.g., 2×16 text); no graphics or arbitrary segment control; incompatible with PCF8576T,118's RAM mapping or blink features. | Choose only for legacy 8-bit MCU designs where I²C is unavailable and display is strictly alphanumeric text. |
Compared with PCF8576T,118, PCF8566T,118 offers reduced segment count but identical cascade and I²C behavior - making it suitable for cost-optimized smaller displays. HD44780U requires more MCU GPIOs, external biasing, and lacks power-saving or bank-switching features - limiting its use to basic text-only applications without advanced display control needs.
Availability
PCF8576T,118 is available at Aetrix Electronics and suitable for industrial panel meters, automotive instrument clusters, portable medical devices, and telecom handsets requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for PCF8576T,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 focused on secure connectivity solutions for automotive, industrial, and IoT applications. Formerly Philips Semiconductors, it maintains legacy product lines with full technical documentation and long-term support commitments.
The PCF8576T,118 belongs to NXP's legacy LCD peripheral family, engineered specifically for low-multiplex-rate character and segment-based displays in resource-constrained embedded systems - emphasizing minimal external components, ultra-low power, and seamless I²C integration.
FAQ
What is the maximum LCD segment count supported by the PCF8576T,118?
The PCF8576T,118 supports up to 40 segment outputs (S0–S39) and 4 backplane outputs (BP0–BP3), enabling configurations such as 20× 7-segment digits, 10× 15-segment alphanumeric characters, or 160-element graphic displays. When cascaded with additional PCF8576T,118 or PCF8566T,118 devices, total segment count scales to 2560 - verified in Philips Application Note AN10322.
Does the PCF8576T,118 require external bias resistors for LCD operation?
No, the PCF8576T,118 includes an integrated LCD bias generator with a three-resistor divider between VDD and VLCD. It supports selectable 1/2 or 1/3 bias levels via internal switching - eliminating external resistors. Only one external resistor (ROSC) is needed for internal oscillator configuration, even in multi-device systems.
Can the PCF8576T,118 drive both static and multiplexed LCDs?
Yes, the PCF8576T,118 natively supports static (1-backplane), 1:2, 1:3, and 1:4 multiplexed LCD configurations. Drive mode is selected via MODE SET commands over I²C, and corresponding bias levels (1/2 or 1/3) are automatically applied. Waveform generation, RAM mapping, and bank selection adapt dynamically to the chosen mode.
How does the power-saving mode affect the PCF8576T,118's performance?
In power-saving mode, the PCF8576T,118 reduces its internal clock division ratio by 6×, lowering supply current significantly - critical for battery-operated devices. This decreases frame frequency (e.g., from fCLK/2880 to fCLK/480) and increases I²C data transmission latency, but preserves full functionality including blinking and RAM access.
Is the PCF8576T,118 pin-compatible with other members of the PCF85xx family?
The PCF8576T,118 shares functional pin compatibility (SDA, SCL, VDD, VSS, VLCD, BPx, Sx) with PCF8566T,118, but differs in package (56-pin VSO56 vs. 44-pin VSO44) and segment count. It is not pin-compatible with PCF8574 or PCF8575 - those are I/O expanders without LCD drive circuitry. Cascade signals (SYNC, CLK) are electrically compatible across PCF8576/PCF8566 devices.
PCF8576T,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 56-BSOP (0.435", 11.05mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Display Type:
- LCD
- Configuration:
- 8 Segment, 15 Segment, 160 Element
- Interface:
- I2C
- Digits or Characters:
- 10 Characters, 20 Characters, 160 Elements
- Current - Supply:
- 180 µA
- Voltage - Supply:
- 2V ~ 9V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-VSO
PCF8576T,118 FAQ
1.How can I place an order for PCF8576T,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCF8576T,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 PCF8576T,118 reliable?
The price and inventory of PCF8576T,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCF8576T,118 is usually 5 days.
3.What payment methods are accepted for PCF8576T,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCF8576T,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCF8576T,118?
PCF8576T,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCF8576T,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 PCF8576T,118?
For technical support, including PCF8576T,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCF8576T,118 requirements.
6.How does Aetrix verify that PCF8576T,118 is sourced from the original manufacturer or authorized distributors?
All PCF8576T,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 PCF8576T,118 meets industry standards.
7.What is the process for return or replacement of PCF8576T,118?
All PCF8576T,118 units undergo pre-shipment inspection (PSI). If there is an issue with PCF8576T,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 PCF8576T,118 part is unused and in its original packaging.
Return procedure for PCF8576T,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCF8576T,118 Tags
-
PCA8561AHN/AY
NXP Semiconductors
-
SN74LS47N
Texas Instruments
-
PCF85176T/1Y
NXP Semiconductors
-
PCF85176H/1,518
NXP Semiconductors
-
BU9796AMUV-E2
Rohm Semiconductor
-
PCA85176H/Q900/1,5
NXP Semiconductors
-
PCF8537AH/1,518
NXP Semiconductors
-
LM3914VX/NOPB
Texas Instruments
-
PCF85134HL/1,118
NXP Semiconductors
-
AS1115-BSST
ams-OSRAM USA INC.
-
PCA8534AH/Q900/1,5
NXP Semiconductors
-
LM3914V/NOPB
Texas Instruments
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…
