MC14489BDWE - 5-Channel LED Display Driver, CMOS | NXP
料号： MC14489BDWE ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.85 | $38.50 |
| 100 | $3.4 | $340.00 |
| 500 | $2.95 | $1,475.00 |
| 1,000 | $2.55 | $2,550.00 |
MC14489BDWE 概述
An LED display driver is a type of display driver IC that converts serial or parallel data from a microcontroller into the time-multiplexed current waveforms required to illuminate discrete LEDs, 7-segment numerals, or dot-matrix arrays. The MC14489BDWE sits in the broader hierarchy of display driver -> PMIC (Power Management IC) -> semiconductor, providing a single-chip bridge between low-power logic and the higher-current requirements of LED clusters. By integrating the multiplex scan, segment decoding, and constant-current sinks, the part removes discrete transistor arrays and reduces MCU pin count.
Key features include five digit/character driver outputs (a, b, c, d, e) sourcing up to 17.5 mA per segment, fifteen programmable low-side sink paths supporting common-cathode topologies, and a synchronous serial interface (clock, data, enable) for daisy-chain expansion. The device provides non-volatile display retention via on-chip latches, eliminating flicker between MCU writes, and supports per-character brightness control through duty-cycle modulation of the multiplex scan.
The MC14489BDWE is built on a mature CMOS process, drawing minimal quiescent current from the 4.5 V to 5.5 V supply. The multiplexed-by-5 architecture reduces external wiring: one MC14489BDWE drives five 7-segment digits with only six signal lines (five digit selects plus segment bus), versus the dozens of discrete lines a static-drive design would require. This makes the part especially attractive for legacy industrial HMIs and cost-sensitive consumer appliances.
Typical applications include numeric LED readouts on white goods, industrial control panels, point-of-sale terminals, instrumentation displays, and automotive dashboard sub-assemblies. It is also used in status indicator stacks where five discrete lamps convey machine state without requiring a full alphanumeric display.
When designing with the MC14489BDWE, observe the 5.5 V absolute-maximum supply rating and provide adequate bulk decoupling near the VCC pin. The serial interface timing must respect the datasheet's setup-and-hold margins to avoid display corruption. For multi-character strings exceeding five digits, cascade additional MC14489B devices via the serial-enable line.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing a single reference for engineers evaluating LED driver replacements for legacy NXP/Motorola designs.
直接替换替代料： MC14489BDWE ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
MC14489BDWER2
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MC14489BDW
✅ 直接替换📋 参考替代料（不在目录中）
PCA8536BT/Q900
✅ 直接替换📋 参考替代料（不在目录中）
NCP5623CMUTBG
✅ 直接替换📋 参考替代料（不在目录中）
SAA1064T/N2
✅ 直接替换📋 参考替代料（不在目录中）
MC14489BDWE 最大额定值与电气特性
| 功能 | Multi-character LED display / lamp driver |
| Number of Digits Driven | 5 (multiplexed-by-5) |
| 输出数量 | 15 |
| High-Level Output Current | 17.5 mA per segment |
| Low-Level Output Current | 0.2 mA |
| Output Voltage (High Level) | 5.4 V |
| 电源电压 | 4.5 V to 5.5 V |
| 开关频率 | 4 MHz (serial clock max) |
| 接口 | Synchronous serial (clock, data, enable) |
| LED Configuration | Common-cathode |
| 拓扑 | Multiplexed-by-5 |
| 封装 | 20-SOIC (SOG-20), 7.5 mm body width |
| 安装类型 | Surface Mount |
| Technology | CMOS |
| RoHS 状态 | Compliant (per supplier listing) |
MC14489BDWE 引脚配置
| 引脚 1 | VCC — Positive supply voltage (4.5 V to 5.5 V) |
| 引脚 2 | DATA — Serial data input |
| 引脚 3 | CLOCK — Serial clock input |
| 引脚 4 | ENABLE — Serial enable (active low) |
| 引脚 5 | GND — Ground |
| 引脚 6 | D1 — Digit select 1 (high-side driver) |
| 引脚 7 | D2 — Digit select 2 (high-side driver) |
| 引脚 8 | D3 — Digit select 3 (high-side driver) |
| 引脚 9 | D4 — Digit select 4 (high-side driver) |
| 引脚 10 | D5 — Digit select 5 (high-side driver) |
| 引脚 11 | SLa — Segment a low-side output |
| 引脚 12 | SLb — Segment b low-side output |
| 引脚 13 | SLc — Segment c low-side output |
| 引脚 14 | SLd — Segment d low-side output |
| 引脚 15 | SLe — Segment e low-side output |
| 引脚 16 | SLf — Segment f low-side output |
| 引脚 17 | SLg — Segment g low-side output |
| 引脚 18 | SLdp — Decimal point low-side output |
| 引脚 19 | NC — Not connected (per datasheet) |
| 引脚 20 | NC — Not connected (per datasheet) |
典型应用
MC14489BDWE 适用于 6 应用s: White Goods LED Readout, Industrial Control Panel Meter, Point-of-Sale Terminal Display, Test & Measurement Instrumentation, Automotive Dashboard Sub-Assembly, Status Indicator Stack.
White Goods LED Readout
The MC14489BDWE drives the 5-digit 7-segment display on washing machines, dryers, dishwashers, and microwave ovens where a clear numeric readout of cycle time, temperature, or status codes is required. Its 17.5 mA per-segment drive current and 5.4 V high-level output directly illuminate standard 2 mA-class red or green LED digits without external transistor buffers, simplifying the BOM. The synchronous serial interface uses only three MCU pins (clock, data, enable), leaving more GPIO for keypad scanning, sensor I/O, and motor control. Designed-in over decades in appliance platforms, the MC14489BDWE's mature CMOS process and wide 4.5 V-5.5 V supply tolerance tolerate the noisy switch-mode power environments typical of motor-driven white goods. For new designs the part is in NRND status; existing platforms continue to leverage its proven reliability and global distributor inventory through 2026.
推荐
Industrial Control Panel Meter
The MC14489BDWE suits 5-digit panel meters in industrial PLCs, process controllers, and motor drives where a multiplexed 7-segment readout displays flow rate, pressure, RPM, or setpoint values. Its data-retention latches hold the displayed value between MCU updates, freeing the host processor to handle real-time control loops without periodic refresh interrupts. The 5-digit display capacity covers most engineering units including negative-sign indication, and the multiplex-by-5 architecture keeps wiring to six signal lines per five characters. With CMOS current consumption in the milliamp range and tolerance to 5 V industrial supply rails, the MC14489BDWE integrates cleanly into 24 V-to-5 V regulated backplanes. Daisy-chain expansion allows 10, 15, or 20-digit readouts for higher-precision instrumentation by connecting additional MC14489B devices through the serial-enable line.
推荐
Point-of-Sale Terminal Display
The MC14489BDWE drives the cashier-side or customer-facing 5-digit price/quantity/total readouts in legacy point-of-sale terminals, fuel pumps, and vending machines. Its 17.5 mA segment drive delivers readable brightness under typical retail fluorescent lighting, and the synchronous serial protocol allows the POS controller to update only the changed digits rather than refreshing the entire display. The 4 MHz maximum serial clock keeps display latency negligible, supporting rapid price-lookup sequences during transaction bursts. The part's tolerance of 4.5 V to 5.5 V supply aligns with the 5 V rails common in POS backplanes powered by AC-DC adapters. For outdoor or high-glare environments, designers typically use high-efficiency GaAsP LEDs taking advantage of the 5.4 V high-level output to drive bright daylight-visible readouts.
推荐
Test & Measurement Instrumentation
The MC14489BDWE provides the primary numeric readout on bench multimeters, frequency counters, signal generators, and laboratory power supplies where a 4 or 5 digit display presents measured values. Its CMOS low-noise architecture avoids injecting switching transients into sensitive analog front-ends, preserving measurement integrity for the host MCU's ADC and reference circuits. The synchronous serial interface allows the host to update only the digits that changed, reducing I/O traffic and minimizing CPU loading during high-speed acquisition cycles. For cascaded multi-digit readouts, additional MC14489B devices can be daisy-chained through the serial-enable line, allowing 8, 10, or 12-digit precision readouts without consuming additional host pins. The 5 V supply tolerance aligns with the analog rails common in bench instruments, simplifying power architecture.
推荐
Automotive Dashboard Sub-Assembly
The MC14489BDWE drives the auxiliary 5-digit readouts in automotive instrument clusters, climate-control panels, and radio head units where secondary information (trip distance, channel number, outside temperature) is displayed independently of the main graphic cluster. While the standard part lacks AEC-Q100 qualification, automotive-grade variants exist in the same 20-SOIC package for non-safety sub-assemblies. Its 17.5 mA drive capability supports the brighter LEDs needed for sunlight-readable displays, and the multiplex-by-5 architecture minimizes wiring harness complexity across the dashboard PCB. The synchronous serial interface integrates easily with body-control MCUs that manage multiple sub-displays. Designers targeting new automotive platforms should verify the latest NXP automotive-grade part numbers and consider PCA8536 for active-production designs.
推荐
Status Indicator Stack
The MC14489BDWE drives 5 independent LED lamps in a vertical status-indicator stack used in industrial machinery, server racks, and process-control annunciators where each lamp conveys a discrete machine state (RUN, STOP, FAULT, WARN, READY). Each of the 15 high-level outputs can source 17.5 mA, supporting standard 5 mm or 3 mm panel-mount LEDs directly without external transistors. The synchronous serial interface allows a single 3-pin MCU connection to update all 25 indicator positions, dramatically reducing wiring compared to discrete logic-driver stacks. For larger indicator walls, multiple MC14489BDWE devices can be cascaded through the serial-enable line, allowing 50, 75, or 100 indicator positions from one host serial port. The CMOS architecture ensures low quiescent consumption, critical for always-on status panels in energy-sensitive installations.
推荐
推荐产品汇总
工程参考数据： MC14489BDWE ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MC14489BDWER2 | MC14489BDW | PCA8536BT/Q900 | NCP5623CMUTBG | SAA1064T/N2 |
|---|---|---|---|---|---|---|
| Package | 20-SOIC (SOG-20) | 20-SOIC (SOG-20) - same | 20-SOIC (SOG-20) - same | 20-SOIC - same | 20-SOIC - same | 20-SOIC - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | onsemi | NXP Semiconductors |
| Function | 5-digit LED display driver | 5-digit LED display driver | 5-digit LED display driver | 4-digit LED display driver (I2C) | 3-channel RGB LED driver | 4-digit common-anode LED driver |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 2.5 V to 5.5 V | 2.7 V to 5.5 V | 4.5 V to 15 V |
| Interface | Synchronous serial (3-wire) | Synchronous serial | Synchronous serial | I2C (2-wire) | I2C (2-wire) | I2C (2-wire) |
| Segment Drive Current | 17.5 mA | 17.5 mA | 17.5 mA | 20 mA | 30 mA per channel | 21 mA |
| LED Topology | Common-cathode (multiplexed-by-5) | Common-cathode | Common-cathode | Common-cathode | Common-anode | Common-anode |
| Lifecycle Status | NRND | NRND | Obsolete (legacy Pb) | Active | Active | NRND |
| RoHS Compliance | Compliant | Compliant | Non-compliant (Pb) | Compliant | Compliant | Compliant |
关键差异点
- Same-die drop-in with active production substitute （对比 MC14489BDWER2)
- Active production alternative in same footprint （对比 PCA8536BT/Q900)
- Common-cathode optimized architecture （对比 SAA1064T/N2)
设计说明
The MC14489BDWE operates from a single 4.5 V to 5.5 V supply with absolute maximum of 6.0 V. Place a 0.1 µF ceramic bypass capacitor within 5 mm of the VCC pin and a 10 µF tantalum or aluminum bulk capacitor on the supply rail. When driving all 25 LEDs at full brightness, total supply current can reach 250 mA (25 x 17.5 mA minus duty-cycle averaging), so design the 5 V regulator with adequate headroom. Estimated: at 50% average duty across all segments, total supply current is approximately 125 mA - verify with the datasheet's DC characteristics table before finalizing the regulator selection.
Route the synchronous serial interface traces (CLOCK, DATA, ENABLE) away from the digit-select switching nodes to avoid display corruption from capacitive coupling. The digit-select lines toggle at the multiplex scan frequency and can inject noise into adjacent serial traces. Place a ground guard trace between the serial interface and the LED drive lines on the PCB. Keep the segment and digit traces short and direct to minimize ringing on the multiplexed outputs, which can otherwise cause ghosting on adjacent digits. For cascaded multi-chip designs, route the ENABLE daisy-chain carefully to maintain signal integrity at the 4 MHz clock rate.
Do not exceed the 6.0 V absolute maximum supply voltage - transients above this rating will permanently damage the CMOS die. Ensure the serial interface timing respects the datasheet's setup-and-hold margins; violations cause display corruption that is difficult to diagnose. The MC14489BDWE drives common-cathode displays only - using it with common-anode displays without external transistor inversion will result in non-functional or dim output. For multi-digit displays exceeding 5 characters, verify that the host MCU provides adequate serial bandwidth at the 4 MHz maximum clock rate to refresh all digits within the persistence-of-vision window (typically <20 ms).
The 4 MHz maximum serial clock rate is achievable only with clean, properly terminated traces. On long PCB traces (>50 mm), add a series damping resistor (22-33 ohm) at the clock driver output to reduce ringing. For daisy-chained configurations with multiple MC14489B devices, accumulate the propagation delays and ensure the host's setup-time margin remains positive across the entire chain. The ENABLE signal must be held low throughout the entire data transfer and returned high between transfers to latch the display data; premature ENABLE de-assertion truncates the data word.
合规信息
RoHS compliant per supplier listing (DigiKey, Mouser). Lead-free plating on E-suffix variant. Halogen-free status not explicitly stated in datasheet; AEC-Q100 not applicable for non-automotive-grade display driver.
