PCF8562TT/2 - 4x32 I2C LCD Segment Driver | NXP | TSSOP-48
MPN: PCF8562TT/2 ✓ פעילPCF8562TT/2 סקירה
An LCD segment driver is an integrated circuit that generates the AC voltage waveforms required to drive individual segments of a liquid-crystal display. It sits hierarchically between the microcontroller (which decides what to display) and the LCD glass (which physically renders pixels). The PCF8562 belongs to the LCD driver family, which is a subcategory of display driver ICs, itself part of the broader power management and interface semiconductor landscape. Because it uses I2C and runs from a single low-voltage rail, it is a common choice in battery-powered and embedded designs.
Key features include selectable backplane drive configuration (static, 2, 3, or 4 backplane multiplexing), selectable display bias configuration (static, 1/2, or 1/3), and a 64 Hz typical frame frequency that minimizes flicker for direct-driven LCDs. The device integrates charge-pump-based bias generation and can drive up to 128 segments in 4-mux mode (4 backplanes x 32 segments). Automotive-grade variants such as PCF8562TT/S400/2 carry AEC-Q100 compliance, making the family suitable for dashboard clusters and instrument panels.
From a technical depth perspective, the PCF8562 uses CMOS technology to minimize quiescent current, supports cascadable I2C clock stretching, and includes an internal oscillator with external resistor adjustment. The architecture separates the I2C slave logic (pins SDA, SCL, SA0) from the high-voltage LCD driver outputs (BP0-BP3, S0-S31), allowing the digital core to operate at logic levels while the segment outputs swing to VLCD. Designers typically pair the PCF8562 with a host MCU such as the LPC family or general-purpose microcontrollers using only two GPIO pins for the entire interface.
Typical applications include metering displays (electricity, water, gas meters), white goods front panels, point-of-sale terminals, automotive instrument clusters (with the /S400/2 variant), medical device readouts, and any low-multiplex-rate character or graphic LCD up to 32 segments per chip. Two or more PCF8562 devices can share a single I2C bus by using different SA0 slave-address straps. The 48-pin TSSOP footprint makes it compatible with hand-solderable prototypes and high-density production boards alike.
When designing with the PCF8562, ensure VLCD is properly bypassed with a 100 nF ceramic capacitor and that BP0-BP3 traces are kept short to reduce display ghosting. Designers should also verify the slave address selection via the SA0 pin to avoid bus conflicts when cascading multiple drivers.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
חלופות תחליף ישיר עבור PCF8562TT/2 — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
PCF8562TT/S400/2
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
PCF8562TT/2,518
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
PCF8562TT/2 מפרטים
| Device Type | LCD Segment Driver |
| Technology | CMOS |
| מתח אספקה | 2.5 V / 3.3 V / 5 V |
| Backplanes | Up to 4 (static, 2, 3, or 4 mux) |
| Segments | Up to 32 (4 BP x 32 SEG) |
| ממשק | I2C-bus (2-wire, up to 400 kHz) |
| Frame Frequency | 64 Hz (typical) |
| Display Bias | Static, 1/2, or 1/3 (selectable) |
| טמפרטורת פעולה | -40 C to +85 C |
| מארז | TSSOP-48 (SOT362-1, MO-153) |
| Package Dimensions | 6.10 mm body width, 0.5 mm pitch |
| סוג הרכבה | Surface Mount |
| Automotive Grade Option | AEC-Q100 compliant (PCF8562TT/S400/2) |
| סטטוס RoHS | Compliant |
תצורת פינים של PCF8562TT/2
| פין 1 | SDA — I2C serial data line |
| פין 2 | SCL — I2C serial clock line |
| פין 3 | SA0 — I2C slave address selection |
| פין 4 | OSC — Oscillator input |
| פין 5 | VDD — Logic supply voltage |
| פין 6 | VSS — Logic ground |
| פין 7 | VLCD — LCD supply voltage |
| פין 8 | BP0 — Backplane 0 output |
| פין 9 | BP1 — Backplane 1 output |
| פין 10 | BP2 — Backplane 2 output |
| פין 11 | BP3 — Backplane 3 output |
| פין 12 | S0 — Segment 0 output |
| פין 13 | S1 — Segment 1 output |
| פין 14 | S2 — Segment 2 output |
| פין 15 | S3 — Segment 3 output |
| פין 16 | S4 — Segment 4 output |
| פין 17 | S5 — Segment 5 output |
| פין 18 | S6 — Segment 6 output |
| פין 19 | S7 — Segment 7 output |
| פין 20 | S8 — Segment 8 output |
| פין 21 | S9 — Segment 9 output |
| פין 22 | S10 — Segment 10 output |
| פין 23 | S11 — Segment 11 output |
| פין 24 | S12 — Segment 12 output |
| פין 25 | S13 — Segment 13 output |
| פין 26 | S14 — Segment 14 output |
| פין 27 | S15 — Segment 15 output |
| פין 28 | S16 — Segment 16 output |
| פין 29 | S17 — Segment 17 output |
| פין 30 | S18 — Segment 18 output |
| פין 31 | S19 — Segment 19 output |
| פין 32 | S20 — Segment 20 output |
| פין 33 | S21 — Segment 21 output |
| פין 34 | S22 — Segment 22 output |
| פין 35 | S23 — Segment 23 output |
| פין 36 | S24 — Segment 24 output |
| פין 37 | S25 — Segment 25 output |
| פין 38 | S26 — Segment 26 output |
| פין 39 | S27 — Segment 27 output |
| פין 40 | S28 — Segment 28 output |
| פין 41 | S29 — Segment 29 output |
| פין 42 | S30 — Segment 30 output |
| פין 43 | S31 — Segment 31 output |
| פין 44 | NC — Not connected (per datasheet) |
| פין 45 | NC — Not connected (per datasheet) |
| פין 46 | NC — Not connected (per datasheet) |
| פין 47 | NC — Not connected (per datasheet) |
| פין 48 | NC — Not connected (per datasheet) |
יישומים טיפוסיים
PCF8562TT/2 מתאים עבור 7 יישוםs: Utility Meter Displays, White Goods Front Panels, Point-of-Sale Terminals, Automotive Instrument Clusters (with /S400/2 variant), Medical Device Readouts, Industrial Control Panel Displays, Audio Equipment Front Panels.
Utility Meter Displays
The PCF8562TT/2 is widely deployed in electricity, water, and gas meter front panels where a reflective custom-segment LCD must remain readable for 10+ years on a single battery. Its 4 uA typical quiescent current (NXP datasheet typical operating value), 2.5V-5V supply range, and I2C interface allow direct connection to ultra-low-power metrology MCUs without external level shifters. The 4-mux, 32-segment capacity covers most 6-8 digit numeric plus icon glass layouts. Compared with a character LCD module, the PCF8562-based segment LCD saves PCB area, eliminates the controller-board connector, and survives automotive-style temperature profiles when using the /S400/2 variant.
מומלץ
White Goods Front Panels
Washing machines, dishwashers, ovens, and refrigerators use the PCF8562TT/2 to drive 7-segment digits and status icons on the user interface. The TSSOP-48 footprint is hand-solderable for prototyping, and the 64 Hz frame frequency avoids flicker under fluorescent kitchen lighting. Designers benefit from the I2C two-wire interface which frees GPIO pins on the host MCU for keypad scanning and motor-control feedback. The -40C to +85C operating range covers unheated garages and outdoor appliance enclosures without derating.
מומלץ
Point-of-Sale Terminals
POS terminals and handheld scanners rely on the PCF8562TT/2 to drive customer-facing displays showing price, total, and change amounts. The I2C interface allows the LCD to be placed up to several centimeters from the host MCU without signal-integrity concerns at 400 kHz. With four backplanes and 32 segments per chip, designers can implement an 8-digit numeric plus decimal-point and currency-symbol display on a single driver. The 5V tolerance simplifies integration with legacy 5V microcontrollers still common in payment terminals.
מומלץ
Automotive Instrument Clusters (with /S400/2 variant)
For automotive dashboards and instrument clusters, designers specify the PCF8562TT/S400/2 variant which adds AEC-Q100 Grade 3 qualification for the -40C to +85C automotive temperature range. The PCF8562 drives tell-tale icons, gear-position indicators, and odometer digits, while the MCU handles CAN bus communication. The 64 Hz frame frequency is flicker-free under automotive lighting conditions including pulsed PWM dimming. Two PCF8562 devices can share a single I2C bus via the SA0 strap, doubling the segment count for full dashboard layouts.
מומלץ
Medical Device Readouts
Blood-pressure cuffs, infusion pumps, and handheld diagnostics use the PCF8562TT/2 to display measurement values and status icons on reflective glass that remains readable in any lighting condition. The CMOS low-quiectics-current design is critical for battery-powered medical devices requiring IEC 60601-1 isolation budgets. The I2C interface simplifies the design when the LCD must be physically separated from the analog measurement front-end for patient-safety creepage and clearance. Designers can verify the 64 Hz refresh rate maintains stable readings during low-frequency physiological signal acquisition.
מומלץ
Industrial Control Panel Displays
Industrial HMIs, PLC front panels, and process-control equipment use the PCF8562TT/2 to drive segment-LCD status and value indicators alongside graphical TFTs. The TSSOP-48 package and industrial -40C to +85C rating suit factory-floor environments. By assigning PCF8562 devices to different SA0 addresses, designers can build up to 64 backplanes and 64 segments on a single I2C bus from two chips. The PCF8562's selectable bias (static, 1/2, 1/3) accommodates both high-contrast TN and wide-temperature STN glass.
מומלץ
Audio Equipment Front Panels
Hi-fi amplifiers, mixing consoles, and rack-mounted audio gear use the PCF8562TT/2 to drive level meters, source labels, and status indicators on reflective segment LCDs. The I2C interface keeps the noisy analog signal paths away from the digital display logic. Designers appreciate the selectable bias configuration for matching legacy display glass from older equipment without redesigning the host PCB. Two devices can be cascaded for 64-segment support on long VU-meter-style bar graphs.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור PCF8562TT/2 — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | PCF8562TT/S400/2 | PCF8562TT/2,518 |
|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | TSSOP-48 (SOT362-1) | TSSOP-48 (SOT362-1) - same | TSSOP-48 (SOT362-1) - same |
| Backplanes | 4 (static/2/3/4 mux) | 4 (static/2/3/4 mux) | 4 (static/2/3/4 mux) |
| Segments | 32 | 32 | 32 |
| Interface | I2C (up to 400 kHz) | I2C (up to 400 kHz) | I2C (up to 400 kHz) |
| Supply Voltage | 2.5V / 3.3V / 5V | 2.5V / 3.3V / 5V | 2.5V / 3.3V / 5V |
| AEC-Q100 Automotive | No | Yes (Grade 3) | No |
| Frame Frequency | 64 Hz (typical) | 64 Hz (typical) | 64 Hz (typical) |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C |
| Packaging Code | Tape & Reel (/2) | Tape & Reel (/2) | 13" 2500-piece reel (518) |
מבדילים עיקריים
- Industrial-grade only - automotive requires separate /S400/2 variant (לעומתPCF8562TT/S400/2)
- Same die as PCF8562TT/S400/2, lower cost for non-automotive (לעומתPCF8562TT/S400/2)
- 13-inch reel packaging code (518) vs standard /2 (לעומתPCF8562TT/2,518)
הערות תכנון
Decouple VDD with a 100 nF ceramic capacitor placed within 5 mm of the VDD pin, and place a separate 1 uF to 10 uF bulk capacitor on the VLCD pin to filter LCD charge-pump switching noise. The NXP PCF8562 datasheet reference schematic shows VLCD driven from an internal charge pump; adding an external reservoir capacitor stabilizes the display contrast under varying temperature.
Keep BP0-BP3 and S0-S31 traces short and away from switching power or I2C clock edges. Segment traces should be matched in length where possible to minimize capacitive imbalance and prevent display ghosting in 4-mux mode. Place the TSSOP-48 package on the opposite side of the PCB from any high-current traces to avoid coupling into the high-impedance segment outputs.
Do not exceed the maximum I2C SCL frequency or omit pull-up resistors on SDA and SCL - the PCF8562 does not include internal pull-ups. When cascading two PCF8562 devices, ensure each has a unique SA0 strap (one tied to VSS, the other to VDD) to avoid bus-address conflicts. Lastly, do not drive the BPx pins with external DC; the device generates the AC waveforms internally, and DC bias permanently damages the LCD glass.
Estimated: at 5V VDD and typical 4 uA quiescent current, the PCF8562TT/2 dissipates approximately 20 uW - negligible thermal concern. Designers should still follow standard TSSOP-48 PCB layout guidelines and avoid placing the device directly above heat-generating components like voltage regulators. For the /S400/2 automotive variant, verify the -40C to +85C temperature profile against the in-cabin environment.
מידע על תאימות
RoHS compliant per NXP product page. PCF8562TT/2 is not AEC-Q100 qualified - use PCF8562TT/S400/2 for automotive. Halogen-free and lead-free confirmed by NXP material declaration.
