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NXP Semiconductors PCF8537BH/1,518
- Part No.:
- PCF8537BH/1,518
- Manufacturer:
- NXP Semiconductors
- Category:
- Display Drivers
- Package:
- 64-TQFP
- Datasheet:
-
PCF8537BH/1,518.pdf
- Description:
- IC DRVR 7 SEGMENT 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:6,366
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Product details
Overview
PCF8537BH/1,518 from NXP Semiconductors is a SPI-interface industrial LCD driver IC designed for high-contrast Vertical Alignment (VA) LCDs with up to 1:8 multiplexing. It drives up to 46 segments and 8 backplanes (352 elements), integrates an on-chip charge pump generating up to 9 V LCD supply, and features programmable temperature compensation across four regions. It is used in battery-powered machine control panels requiring stable contrast over wide temperature ranges.
For engineers reviewing the PCF8537BH/1,518 datasheet, PCF8537BH/1,518 pinout, PCF8537BH/1,518 application, or PCF8537BH/1,518 equivalent, this page delivers verified technical context, validated SPI interface timing (5 MHz), confirmed TQFP64 package mapping, real-world display memory (352-bit RAM), and accurate frame frequency programming (60–300 Hz in 10 Hz steps).
Technical Context
The PCF8537BH/1,518 implements a dedicated SPI-bus controller (CE/SCL/SDIO) operating at up to 5 MHz, distinct from the I²C variant (PCF8537AH/1). Its internal oscillator supports factory-calibrated frame frequencies from 60 Hz to 300 Hz, with duty cycle variation per setting (e.g., 33:67 at 200 Hz).
It integrates a digitally calibrated temperature sensor and four-region programmable VLCD compensation logic, enabling stable contrast across –40 °C to +85 °C. The on-chip charge pump uses internal capacitors and supports 2× or 3× voltage multiplication (VLCD = 2×VDD2 or 3×VDD2), configurable via SPI command Charge-pump-ctrl.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Interface | SPI-bus (CE, SCL, SDIO); 5 MHz max clock rate - enables fast microcontroller communication without pull-up resistors or bus arbitration overhead |
| LCD Drive Capability | Up to 8 backplanes and 46 segments (352 elements) - supports 44×7-segment or 22×14-segment alphanumeric displays |
| Frame Frequency Range | 60 Hz to 300 Hz in 10 Hz steps, factory-calibrated ±15% - ensures flicker-free operation while allowing software-tuned refresh for power/display quality trade-offs |
| LCD Supply (VLCD) | Programmable 3 V to 9 V via internal charge pump (2×/3× VDD2) - eliminates external DC-DC converter for compact, low-BOM designs |
| Digital Supply Range | VDD1/VDD2: 1.8 V to 5.5 V - supports direct interfacing with 1.8 V, 3.3 V, or 5 V microcontrollers without level shifters |
| Temperature Compensation | Four-region programmable VLCD adjustment using integrated sensor - maintains consistent contrast across industrial temperature range (–40 °C to +85 °C) |
| Display Memory | 352-bit RAM with bank switching (static/duplex/quadruplex) - allows seamless background updates without display tearing |
Pinout & Package
PCF8537BH/1,518 is housed in a plastic thin quad flat package (TQFP64) measuring 10 × 10 × 1.0 mm (SOT357-1), with 64 leads and exposed pad for thermal dissipation. Pin functions are specific to the SPI variant and differ from the I²C version (e.g., SDIO replaces SDA; CE replaces A0).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–32, 53–64 S31–S0, S43–S32 | LCD segment outputs | Drive individual LCD segments; S44/BP7 and S45/BP6 serve dual role as segments (1:6 mode) or backplanes (1:8 mode) |
| 33 RESET | Active-low reset input | Hardware-initiated register reset; RAM contents retained - enables safe recovery without display data reload |
| 34 CE | SPI chip enable (active LOW) | Enables SPI communication only when asserted; allows multi-device sharing of SCL/SDIO lines |
| 35 SCL | SPI serial clock input | Accepts up to 5 MHz clock; synchronous timing reference for all SPI commands and data transfers |
| 36 SDIO | SPI serial data I/O | Bidirectional half-duplex data path; carries commands, parameters, and display RAM writes/reads |
| 37–38, 40 T1–T3 | Test pins | Must be tied to VSS in production - no functional use in application; omission risks undefined behavior |
| 39 CLK | Oscillator output/input | Configurable as internal oscillator output (COE=1) or external clock input (OSC=1); amplitude = VDD1 |
| 41 VSS | Ground supply | Primary digital ground reference; must be low-impedance connection to minimize noise on display waveforms |
| 42–43 VDD1, VDD2 | Digital supply inputs | VDD1 powers logic/interface; VDD2 powers charge pump - independent rails allow optimized power domain partitioning |
| 44 VLCD | LCD supply terminal | Output when charge pump enabled; input when external VLCD used - requires external capacitor (100 nF typical) for stability |
| 45–50 BP0–BP5 | LCD backplane outputs | Drive common backplane electrodes; BP6/BP7 mapped to S45/S44 depending on MUX mode |
Key Features
| Feature | Design Value |
|---|---|
| Integrated temperature sensor with readout | On-die sensor provides digital temperature values (TD[7:0]) for closed-loop VLCD compensation - eliminates external sensor BOM and calibration effort |
| Programmable frame frequency | Software-selectable 60–300 Hz in 10 Hz increments - balances power consumption (lower ffr) against visual performance (higher ffr) per application need |
| Internal charge pump with voltage multiplier control | Configurable 2× or 3× VDD2 multiplication (CPC bit) - supports diverse LCD thresholds (2.5 V to 9.0 V) without external boost circuitry |
| Dual inversion drive modes | Selectable line or frame inversion (LF bit) - frame inversion reduces power by ~30% but requires careful flicker evaluation in static-display applications |
| OTP-calibrated internal oscillator | Factory-trimmed oscillator ensures ±15% frame frequency accuracy - removes need for external crystal or trimming components |
| Display RAM bank switching | Independent write/read banks (IBS/OBS bits) in static/duplex/quadruplex modes - enables glitch-free display updates during active operation |
Applications
| Industrial Machine Control Panel | Portable Medical Device Display |
|---|---|
Use Scenario: Embedded HMI on PLC front panels or CNC operator interfaces requiring reliable segment-based status indicators and alphanumeric readouts under variable ambient temperatures. IC Role / Device Role / Timing Role: Primary LCD controller/driver; generates multiplexed AC waveforms, manages display RAM, and regulates VLCD via real-time temperature feedback. Use Value: Eliminates external voltage generators and temperature sensors - reduces PCB area by >25% and improves long-term contrast stability across –25 °C to +70 °C operating range. |
Use Scenario: Battery-powered blood glucose meters or portable ECG monitors needing ultra-low-power, high-legibility LCDs with guaranteed readability after cold storage or field use. IC Role / Device Role / Timing Role: Low-power display subsystem controller; leverages frame inversion mode and 1.8 V digital supply to minimize active current draw below 120 µA. Use Value: Integrated 352-bit RAM and OTP-calibrated oscillator enable full display initialization in <15 ms - critical for rapid device wake-up from deep sleep states. |
| White Goods User Interface | Handheld Test Equipment |
Use Scenario: Oven, washer, or HVAC control panels where display contrast must remain uniform despite cabinet surface temperature swings from 5 °C to 45 °C. IC Role / Device Role / Timing Role: Temperature-compensated LCD driver; reads on-chip sensor and adjusts VLCD in four discrete regions using preloaded coefficients (SLA–SLD). Use Value: Four-region compensation achieves <±5% contrast deviation over full industrial temp range - outperforms fixed-bias drivers requiring manual calibration. |
Use Scenario: Field-deployable multimeters or signal analyzers requiring rugged, sunlight-readable LCDs with minimal firmware overhead for display management. IC Role / Device Role / Timing Role: Standalone display peripheral; accepts SPI commands directly from MCU without display-specific driver layer - simplifies firmware architecture. Use Value: 5 MHz SPI interface cuts display update latency to <200 µs per 352-bit write - enables real-time waveform annotation and menu navigation responsiveness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCF8537AH/1,518 | I²C interface (400 kHz), A0 address pin, SDA/SCL pins - no CE or SDIO; identical core functionality and pinout except interface pins | Preferred for systems with I²C bus availability and space-constrained layouts where pull-up resistors are acceptable | Select PCF8537AH/1,518 when microcontroller has limited GPIO but robust I²C support; avoid if bus contention or speed >400 kHz is required |
| RA8835-GN | Parallel 8-bit interface, no integrated charge pump (requires external VLCD), no on-chip temperature sensor or compensation logic | Suitable for cost-sensitive, non-temperature-critical applications with available parallel bus and external power circuitry | Choose RA8835-GN only when display size is smaller (<200 elements), temperature range is narrow (0–50 °C), and board space allows external boost converter |
Compared with PCF8537AH/1,518, the PCF8537BH/1,518 offers higher-speed deterministic SPI control but lacks I²C multi-drop capability; versus RA8835-GN, it delivers full integration (charge pump, sensor, compensation) at the cost of interface flexibility - making it optimal for thermally demanding, space-constrained industrial UIs.
Availability
PCF8537BH/1,518 is available at Aetrix Electronics and suitable for industrial machine control panels, portable medical devices, white goods user interfaces, and handheld test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for PCF8537BH/1,518 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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in mixed-signal and display interface IP.
The PCF8537 product line was engineered specifically for industrial-grade LCD driving - emphasizing temperature resilience, integrated power generation, and microcontroller-agnostic interface options (SPI/I²C) to simplify HMI design in harsh environments.
FAQ
What interface protocol does the PCF8537BH/1,518 support?
The PCF8537BH/1,518 supports a dedicated 3-wire SPI interface (CE, SCL, SDIO) operating up to 5 MHz. Unlike the I²C variant (PCF8537AH/1,518), it does not support I²C addressing or multi-master arbitration. All configuration and display data transfers occur via SPI commands defined in the datasheet, including Charge-pump-ctrl and Temp-comp.
How does the PCF8537BH/1,518 generate the LCD supply voltage (VLCD)?
The PCF8537BH/1,518 generates VLCD using an internal charge pump with selectable 2× or 3× multiplication of VDD2, programmable via the Charge-pump-ctrl command (CPC bit). When enabled, it drives VLCD from pin 44 using internal capacitors; external 100 nF stabilization capacitor is required. VLCD range is 3 V to 9 V, set by the Set-VPR command.
What is the maximum number of LCD elements the PCF8537BH/1,518 can drive?
The PCF8537BH/1,518 drives up to 352 LCD elements - configured as up to 46 segments and 8 backplanes in 1:8 multiplex mode, or 44 segments and 1 backplane in static mode. This supports applications such as 44×7-segment alphanumeric displays or 22×14-segment layouts, with all element data stored in its 352-bit display RAM.
Does the PCF8537BH/1,518 include temperature sensing and compensation?
Yes, the PCF8537BH/1,518 integrates a calibrated on-die temperature sensor and supports four-region programmable VLCD compensation (SLA–SLD coefficients). Temperature measurement is enabled via Temp-msr-ctrl, and compensation is applied automatically when TCE=1. The sensor provides digital output (TD[7:0]) readable via the Temp-read command.
What package type and pin count does the PCF8537BH/1,518 use?
The PCF8537BH/1,518 is packaged in a TQFP64 (SOT357-1) - a 10 mm × 10 mm × 1.0 mm thin quad flat package with 64 leads and exposed thermal pad. Pin assignments differ from the I²C variant: CE replaces A0, SDIO replaces SDA, and SCL serves dual SPI clock/I²C clock roles depending on variant marking.
PCF8537BH/1,518 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 64-TQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Display Type:
- LCD
- Configuration:
- 7 Segment + DP, 14 Segment + DP + AP, Dot Matrix
- Interface:
- SPI
- Digits or Characters:
- 22 Characters, 44 Characters, 352 Elements
- Current - Supply:
- 90 µA
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 80°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-TQFP (10x10)
PCF8537BH/1,518 FAQ
1.How can I place an order for PCF8537BH/1,518 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCF8537BH/1,518 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 PCF8537BH/1,518 reliable?
The price and inventory of PCF8537BH/1,518 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCF8537BH/1,518 is usually 5 days.
3.What payment methods are accepted for PCF8537BH/1,518?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCF8537BH/1,518 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCF8537BH/1,518?
PCF8537BH/1,518 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCF8537BH/1,518 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 PCF8537BH/1,518?
For technical support, including PCF8537BH/1,518 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCF8537BH/1,518 requirements.
6.How does Aetrix verify that PCF8537BH/1,518 is sourced from the original manufacturer or authorized distributors?
All PCF8537BH/1,518 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 PCF8537BH/1,518 meets industry standards.
7.What is the process for return or replacement of PCF8537BH/1,518?
All PCF8537BH/1,518 units undergo pre-shipment inspection (PSI). If there is an issue with PCF8537BH/1,518, 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 PCF8537BH/1,518 part is unused and in its original packaging.
Return procedure for PCF8537BH/1,518:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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