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NXP Semiconductors PCA8537AH/Q900/1,5
- Part No.:
- PCA8537AH/Q900/1,5
- Manufacturer:
- NXP Semiconductors
- Category:
- Display Drivers
- Package:
- 64-TQFP
- Datasheet:
-
PCA8537AH/Q900/1,5.pdf
- Description:
- IC DRVR 7 SEGMENT 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,183
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Product details
Overview
PCA8537AH/Q900/1 from NXP Semiconductors is an AEC-Q100 qualified automotive 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 - deployed in instrument clusters, car radios, and climate control units.
For engineers reviewing the PCA8537AH/Q900/1 datasheet, PCA8537AH/Q900/1 pinout, PCA8537AH/Q900/1 application, or PCA8537AH/Q900/1 equivalent, key selection criteria include I²C-bus interface (400 kHz), TQFP64 package, 352-bit display RAM, factory-calibrated frame frequency (60–300 Hz), and integrated temperature sensor with readout capability.
Technical Context
The PCA8537AH/Q900/1 implements a dual-domain timing architecture: internal oscillator (factory-calibrated, software-programmable frame frequency) or external clock input via CLK pin, with configurable duty cycle per frame rate. Its LCD drive logic supports static, 1:2, 1:4, 1:6, and 1:8 multiplex modes, selectable bias (1/2, 1/3, 1/4), and line/frame inversion schemes to suppress DC voltage buildup.
It integrates a digitally controlled charge pump (2× or 3× VDD2 multiplication), VLCD temperature compensation using four user-programmable coefficient regions (SLA–SLD), and dual-bank RAM switching for seamless display updates - all managed via I²C-bus commands including Set-MUX-mode, Temp-comp, Charge-pump-ctrl, and Frame-frequency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Interface | I²C-bus, 400 kHz maximum data rate; supports standard and fast-mode protocols |
| LCD Drive Capacity | Up to 352 elements: 46 segments × 8 backplanes (1:8), or 44 segments × 1 backplane (static) |
| Frame Frequency Range | 60 Hz to 300 Hz in 10 Hz steps; factory-calibrated ±15% accuracy |
| LCD Supply (VLCD) | Internally generated up to 9.0 V (via 2× or 3× charge pump); externally supplied range 2.5–9.0 V |
| Digital Supply (VDD1/VDD2) | VDD1: 1.8–5.5 V (logic domain); VDD2: 1.8–5.5 V (charge pump reference) |
| Temperature Compensation | Four programmable regions (SFA–SFD); coefficients SLA–SLD set via Temp-comp command |
| Display Memory | 352-bit RAM with bank-select capability for static/duplex/quadruplex modes |
Pinout & Package
TQFP64 (SOT357-1) package: plastic thin quad flat package, 10 mm × 10 mm × 1.0 mm body, 64 leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–32 (S31–S0) | LCD segment outputs | Drive up to 46 segments; pins S43–S32 and S45/S44 repurposed as BP6/BP7 in 1:8 mode |
| 33 (RESET) | Active-low reset input | Asynchronous hardware reset; preserves RAM content but restores all registers to default state |
| 34 (SDA) | I²C-bus bidirectional data | Open-drain, requires external pull-up; supports standard/fast-mode I²C communication |
| 35 (SCL) | I²C-bus clock input | Drives internal timing; synchronizes command/data transfers on rising edge |
| 36 (A0) | I²C slave address select | Configures LSB of 7-bit slave address (0x70 or 0x71) for multi-device bus operation |
| 41 (VSS) | Ground reference | Common return path for digital, analog, and LCD domains; must be low-impedance |
| 42 (VDD1) | Digital supply | Powers logic core, I²C interface, and RAM; 1.8–5.5 V operation |
| 43 (VDD2) | Charge pump supply | Reference voltage for internal VLCD generation; same range as VDD1 |
| 44 (VLCD) | LCD supply terminal | Output when charge pump enabled; input when external VLCD used (requires CPE = 0) |
| 45–50 (BP0–BP5) | LCD backplane outputs | Drive up to 8 backplanes; BP6/BP7 mapped to S45/S44 in 1:8 mode |
| 51–52 (S45/BP6, S44/BP7) | Multiplex-configurable terminals | In 1:6 mode: segment outputs; in 1:8 mode: additional backplane outputs |
| 53–64 (S43–S32) | LCD segment outputs | Completes full 46-segment support; functional only in non-static drive modes |
| 39 (CLK) | Oscillator I/O | 3-state output for internal clock; becomes input when external oscillator selected (OSC = 1) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 2 qualification | Validated for automotive ambient temperature range (−40 °C to +105 °C) and reliability stress testing |
| Integrated temperature sensor | On-die sensor with digital readout (Temp-read command); enables closed-loop VLCD compensation |
| Programmable frame inversion | Reduces power consumption vs. line inversion; selectable via Invmode_ctrl (LF bit) for flicker-sensitive applications |
| OTP-based factory calibration | One-time programmable cells calibrate VLCD accuracy, frame frequency, and temperature measurement at production |
| Dual-bank RAM addressing | Enables background RAM update while displaying from alternate bank - critical for glitch-free UI transitions |
| External VLCD disable option | Charge pump can be disabled (CPE = 0) to use external high-precision VLCD source without internal regulation |
Applications
| Instrument Cluster | Car Radio Display |
|---|---|
Use Scenario: Driving information display with speed, RPM, fuel level, warning icons, and trip data in modern automotive dashboards. IC Role / Device Role / Timing Role: Primary LCD controller/driver managing multiplexed VA panel with real-time temperature-compensated contrast. Use Value: Ensures consistent legibility across −40 °C to +105 °C ambient; eliminates manual contrast adjustment and reduces MCU firmware overhead. |
Use Scenario: Multi-function audio head unit display showing station ID, track name, equalizer settings, and menu navigation. IC Role / Device Role / Timing Role: Standalone segment driver handling alphanumeric and custom symbol rendering via 352-bit RAM and bank-switching. Use Value: Supports dynamic UI updates without display flicker; built-in frame frequency tuning avoids visible beat frequencies with PWM lighting. |
| Climate Control Panel | Driver Information Center |
Use Scenario: HVAC interface with temperature digits, fan speed bars, air direction icons, and mode indicators in center console. IC Role / Device Role / Timing Role: Low-power LCD driver operating from vehicle battery; manages static + multiplexed segments simultaneously. Use Value: Reduces system-level power draw via frame inversion and optimized charge pump efficiency; meets automotive sleep-mode current targets. |
Use Scenario: Configurable driver information display behind steering wheel showing ADAS status, navigation prompts, and connectivity alerts. IC Role / Device Role / Timing Role: High-reliability display controller with AEC-Q100 compliance and OTP-traceable calibration data. Use Value: Guarantees display functionality under EMI stress and thermal cycling; simplifies OEM validation by providing certified timing and bias stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCA8537BH/Q900/1 | SPI-bus interface (5 MHz) instead of I²C; identical pinout, RAM, charge pump, and temperature features | Better suited for systems with SPI-native MCUs or where I²C bus loading is constrained | Select PCA8537BH/Q900/1 when SPI infrastructure exists and deterministic timing is prioritized over bus sharing capability |
| PCF8576DT/1,118 | Lower element count (144 segments), no integrated temperature sensor or programmable VLCD compensation; I²C interface only | Targeted at cost-sensitive non-automotive displays with fixed-temperature operation and simpler bias requirements | Choose PCF8576DT/1,118 only for non-automotive consumer panels where AEC-Q100, 352-element capacity, and closed-loop contrast control are unnecessary |
Compared with PCA8537BH/Q900/1, the PCA8537AH/Q900/1 offers superior bus flexibility in mixed-protocol systems but lacks SPI's deterministic latency; versus PCF8576DT/1,118, it delivers automotive-grade reliability, higher resolution, and adaptive contrast - at higher BOM cost and design complexity.
Availability
PCA8537AH/Q900/1 is available at Aetrix Electronics and suitable for instrument cluster, car radio, and climate control unit designs requiring stable component supply, long-term automotive lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for PCA8537AH/Q900/1 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 automotive microcontrollers and display interfaces.
The PCA8537 product line was engineered specifically for automotive LCD instrumentation - delivering integrated timing, temperature-aware contrast control, and robust multiplexed drive capability in a single chip to replace discrete controller+driver+regulator combinations.
FAQ
What interface protocol does the PCA8537AH/Q900/1 support?
The PCA8537AH/Q900/1 supports only the I²C-bus interface at up to 400 kHz, as confirmed by its type number suffix "AH" and datasheet Table 1. It does not support SPI - that variant is the PCA8537BH/Q900/1. The I²C implementation includes standard and fast-mode compatibility, 7-bit slave addressing with A0 pin selection, and open-drain SDA/SCL with required external pull-ups.
Does the PCA8537AH/Q900/1 require external capacitors for its charge pump?
Yes, the PCA8537AH/Q900/1 requires external capacitors on the VLCD pin when using the internal charge pump. Although internal capacitors are present, the datasheet specifies that stabilization time (5–15 ms) depends on the external capacitor value - typically 100 nF - placed between VLCD and VSS. These capacitors are mandatory for stable VLCD voltage ramp-up and avoidance of display artifacts during startup.
How is temperature compensation implemented in the PCA8537AH/Q900/1?
The PCA8537AH/Q900/1 implements four-region programmable temperature compensation using coefficients SLA, SLB, SLC, and SLD - each loaded via dedicated Temp-comp commands. These coefficients adjust VLCD based on readings from its integrated on-die temperature sensor. Compensation is enabled by setting TCE = 1 in the Temp-msr-ctrl command, and the sensor output is readable via the Temp-read command (TD[7:0]).
What is the maximum LCD element count supported by the PCA8537AH/Q900/1?
The PCA8537AH/Q900/1 supports up to 352 LCD elements, achieved through configurable multiplexing: 46 segments × 8 backplanes (1:8 mode), 44 segments × 6 backplanes (1:6), or 44 segments × 1 backplane (static). This capacity enables driving up to 44 seven-segment characters or 22 fourteen-segment alphanumeric displays - verified in Section 2 "Features and benefits" and Table 14 (Set-MUX-mode).
Is the PCA8537AH/Q900/1 pin-compatible with other members of the PCA8537 family?
Yes, the PCA8537AH/Q900/1 is pin-compatible with the PCA8537BH/Q900/1 - both use the identical TQFP64 (SOT357-1) package and share identical pin functions except for interface-specific pins: SDA/SCL (AH) versus CE/SCL/SDIO (BH). Pin-for-pin replacement is possible with only firmware and PCB routing changes to accommodate the different bus protocol signals.
PCA8537AH/Q900/1,5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 64-TQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Last Time Buy
- Display Type:
- LCD
- Configuration:
- 7 Segment + DP, 14 Segment + DP + AP, Dot Matrix
- Interface:
- I2S
- Digits or Characters:
- 22 Characters, 44 Characters, 352 Elements
- Current - Supply:
- 200 µA
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 95°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-TQFP (10x10)
PCA8537AH/Q900/1,5 FAQ
1.How can I place an order for PCA8537AH/Q900/1,5 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA8537AH/Q900/1,5 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 PCA8537AH/Q900/1,5 reliable?
The price and inventory of PCA8537AH/Q900/1,5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA8537AH/Q900/1,5 is usually 5 days.
3.What payment methods are accepted for PCA8537AH/Q900/1,5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA8537AH/Q900/1,5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA8537AH/Q900/1,5?
PCA8537AH/Q900/1,5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA8537AH/Q900/1,5 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 PCA8537AH/Q900/1,5?
For technical support, including PCA8537AH/Q900/1,5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA8537AH/Q900/1,5 requirements.
6.How does Aetrix verify that PCA8537AH/Q900/1,5 is sourced from the original manufacturer or authorized distributors?
All PCA8537AH/Q900/1,5 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 PCA8537AH/Q900/1,5 meets industry standards.
7.What is the process for return or replacement of PCA8537AH/Q900/1,5?
All PCA8537AH/Q900/1,5 units undergo pre-shipment inspection (PSI). If there is an issue with PCA8537AH/Q900/1,5, 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 PCA8537AH/Q900/1,5 part is unused and in its original packaging.
Return procedure for PCA8537AH/Q900/1,5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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