MM5451YN - 35-Output LED Display Driver DIP-40 | Microchip
MPN: MM5451YN ✓ Hoạt độngMM5451YN Tóm tắt
An LED display driver is a dedicated power-management interface IC that sits between a digital controller (microcontroller, FPGA, or logic) and an LED load. In the display-driver hierarchy, the MM5451YN belongs to the non-multiplexed, directly driven class of LED drivers: each output sinks current continuously, so no multiplexing timing is required from the host and no external driver transistors are needed for typical segment loads.
The MM5451YN is fabricated in an N-channel, metal-gate MOS process producing low-threshold enhancement-mode and ion-implanted depletion-mode devices. Its headline features are 35 open-drain-style current-sinking outputs, a serial data interface requiring only clock and data lines, and a single-pin brightness control: one external variable resistor from the brightness pin to the supply sets a reference current that scales all 35 outputs simultaneously.
Because the part is non-multiplexed, each output runs at continuous duty cycle, giving maximum instantaneous brightness per segment and eliminating multiplex flicker. The 500 kHz-class serial clock rate allows a full 35-bit shift-register update in well under 100 microseconds, fast enough for animation on large bar-graph and status panels. Output capability is specified around 1.8V output voltage at 2.7 mA per output per FindIC's summary of the Micrel datasheet; for higher-current operation the datasheet output ratings should be consulted.
Typical applications include industrial panel meters, instrumentation annunciator and bar-graph displays, appliance and white-goods LED indicators, elevator and HVAC status boards, and vending or kiosk front panels - anywhere a static LED array of up to 35 points must be driven from a small microcontroller with minimal pin count.
A key design consideration: because the MM5451YN is not multiplexed, total package power dissipation scales directly with the number of lit segments and the per-segment current set by the brightness resistor, so thermal budgeting on the DIP-40 package is essential at high duty cycles.
This page adds value beyond the datasheet by synthesizing distributor pricing, drop-in alternative analysis against the MM5450 and ST M5451 families, and practical design notes in one place.
Bộ thay thế dễ dàng lắp đặt cho MM5451YN — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MM5451YN (cùng hình factor và footprint) — khác nhau ở Brightness Control, Interface, Package.
MM5451BN
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MM5450YN
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MM5450BN
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
M5451B7
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MM5451YN Tỷ lệ tối đa & tính chất điện
| Chức năng | LED Display Driver |
| Output Channels | 35 |
| Supply Voltage Range | 4.75 V to 11 V |
| Giao diện | Serial (clock + data) |
| Display Type | LED, non-multiplexed direct drive |
| Điện áp đầu ra | 1.8 V |
| Output Current | 2.7 mA |
| Tần số chuyển đổi | 500 kHz |
| Brightness Control | Single-pin, external variable resistor sets reference current |
| Process Technology | N-channel metal-gate MOS |
| Hộp | 40-DIP (0.600 in, 15.24 mm) |
| Kiểu lắp đặt | Through Hole |
Hướng dẫn cấu hình chân MM5451YN 40-dip (0.600 in, 15.24 mm)
Cấu hình chân cho MM5451YN (40-dip (0.600 in, 15.24 mm) gói). Động cơ điện này có chân cổng, nguồn và đầu ra. Đối với các gói không phân極, tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết hướng dẫn chính xác của chân 1 và chi tiết về vân footprint. Các ứng dụng phổ biến bao gồm thiết kế nguồn cung cấp điện, điều khiển động cơ và chuyển đổi tải.
Không có dữ liệu chân cụ thể sẵn có cho MM5451YN.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
MM5451YN phù hợp cho 6 Áp dụngs: Industrial Panel Meters and Annunciators, Bar-Graph Level Indicators, Appliance and White-Goods Front Panels, Elevator and HVAC Status Boards, Vending Machines and Kiosk Front Panels, Test and Measurement Front-Panel Indicators.
Industrial Panel Meters and Annunciators
The MM5451YN fits industrial panel instrumentation because its 4.75V to 11V supply range absorbs rail variation common on control panels, while its two-wire serial interface lets a small microcontroller drive up to 35 indicators without port expansion. The non-multiplexed outputs hold constant current through every lit segment, giving steady, flicker-free annunciation that is easy to read at distance and on camera. With 35 channels, a single device covers a 4-digit 7-segment readout plus decimal points and alarm flags. Designers should budget package dissipation from the number of simultaneously lit segments and the current set by the single brightness resistor, since continuous-duty static drive dissipates more power than multiplexed schemes at the same perceived brightness.
Được đề xuất
Bar-Graph Level Indicators
A 35-output, non-multiplexed driver is a natural fit for bar-graph level displays - audio VU meters, tank-level indicators, and process loop bargraphs - because each of the 35 segments maps to one driver output with continuous duty cycle, producing uniform segment brightness with no scan artifacts. The single-pin brightness control sets the reference current for all outputs at once, so a front-panel potentiometer gives calibrated, flicker-free dimming across the whole bar without firmware changes or PWM timing. Updates via the serial interface complete a full 35-bit frame quickly at the part's clock capability, supporting smooth animated level indication. Because all segments below the level point may be lit simultaneously, verify total package power dissipation on the DIP-40 through-hole package and provide adequate copper or airflow for full-scale indications.
Được đề xuất
Appliance and White-Goods Front Panels
Appliance control boards - ovens, washing machines, refrigerators - need many status LEDs and a few numeric digits driven from a low-cost microcontroller. The MM5451YN serves this role with 35 outputs and only clock and data lines to the host, minimizing connector and harness cost between the user-interface board and the main controller. Its supply range of 4.75V to 11V tolerates unregulated or loosely regulated appliance supplies, and the analog single-pin brightness control supports the soft-dim night-mode behavior consumers expect, with no PWM flicker that could show up in product photography or video reviews. The through-hole DIP-40 package suits wave-soldered, serviceable consumer appliance PCBs where field repair and long mechanical part lives are design requirements.
Được đề xuất
Elevator and HVAC Status Boards
Floor-indicator and HVAC status displays often require dozens of discrete LED points - floor numbers, arrow indicators, and fault flags - driven reliably for decades. The MM5451YN addresses this with 35 static outputs, eliminating multiplex timing from the host and removing the flicker and uneven-brightness artifacts of scanned displays, which matters in continuously operating building equipment viewed from a distance. The 4.75V to 11V supply tolerance copes with building control supply variation, and continuous-duty drive gives each lit point maximum instantaneous brightness without peak-current stress on the LEDs. The serial interface allows one controller to update the board over simple wiring, and the DIP-40 through-hole package supports the high-reliability, repairable construction typical of elevator and building-automation hardware.
Được đề xuất
Vending Machines and Kiosk Front Panels
Unattended retail equipment uses arrays of LEDs for selection buttons, price displays, and service flags. The MM5451YN drives 35 points from a single serial-interface driver, so a low-pin-count controller can illuminate an entire selection-panel matrix without charlieplexing complexity or multiplex firmware. Static drive means every lit selection LED shows constant brightness regardless of how many others are active - a visible quality advantage over scanned designs on glossy kiosk fascias. Brightness is adjusted globally with one resistor, letting operators tune panel visibility for brightly lit store environments versus dim lobbies. Designers should derate total lit-segment current against the DIP-40 package thermal capability, and the 4.75V to 11V input range accepts the loosely regulated internal supplies typical of vending electronics.
Được đề xuất
Test and Measurement Front-Panel Indicators
Bench instruments and rack equipment need dependable status and range indication that never flickers during acquisition - exactly what the MM5451YN's non-multiplexed, continuously driven 35 outputs deliver. Range LEDs, limit flags, and a small numeric readout fit within one device, addressed over a simple serial link from the instrument's microcontroller. The analog single-pin brightness scheme produces no PWM switching artifacts that could radiate into sensitive analog front ends, an advantage over PWM-dimmed LED drivers in precision measurement products. The 4.75V to 11V supply range integrates with classic instrument rails, and the through-hole DIP-40 package suits the serviceable, long-lifecycle construction expected of laboratory equipment. Total dissipation scales with lit segments, so check package power at worst-case full-panel indication.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MM5451YN — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | MM5451BN | MM5450YN | MM5450BN | M5451B7 |
|---|---|---|---|---|---|
| Package | 40-DIP (0.600, 15.24mm) | 40-DIP - same footprint | 40-DIP (0.600, 15.24mm) - same footprint | 40-DIP - same footprint | 40-DIP - same footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | STMicroelectronics |
| Output Channels | 35 | 35 | 34 | 34 | 35 |
| Interface | Serial | Serial | Serial | Serial | Serial |
| Brightness Control | Single-pin resistor | Single-pin resistor | Single-pin resistor | Single-pin resistor | Single-pin resistor |
| Drive Type | Non-multiplexed, continuous | Non-multiplexed, continuous | Non-multiplexed, continuous | Non-multiplexed, continuous | Non-multiplexed, continuous |
| Process Technology | N-channel metal-gate MOS | N-channel metal-gate MOS | N-channel metal-gate MOS | N-channel metal-gate MOS | N-channel silicon-gate MOS |
Bảo phân biệt quan trọng
- Full 35-output channel count (vsMM5450YN)
- True drop-in cross-brand equivalent exists (vsM5451B7)
- Analog single-pin dimming with zero flicker (vsMM5451BN)
Ghi chú thiết kế
Estimated: because the MM5451YN is non-multiplexed, package dissipation equals the sum of (output headroom voltage x set current) over all lit segments. With, for example, 20 segments lit at 2.7 mA and roughly 1.8 V output headroom, dissipation is about 20 x 2.7 mA x 1.8 V = 97 mW - modest, but at higher per-output currents or more lit segments the DIP-40 through-hole thermal resistance becomes the limiting factor. Compute worst-case dissipation from your actual segment count and brightness resistor setting before finalizing the layout.
Set the per-channel current with the single external variable resistor from the brightness pin to the supply - this one component scales all 35 outputs, so use a stable, low-tempco resistor (or a fixed resistor plus trimmer) for repeatable brightness. Do not exceed the 11V maximum supply. When substituting the MM5450YN, remember it has only 34 outputs: the 35th segment will be unaddressable. Verify LED string voltage plus output headroom stays within supply budget so sinks remain in regulation.
For the through-hole DIP-40, provide a solid ground path to the LED return network and keep the serial clock and data traces short and away from LED current loops to avoid clock glitches that would corrupt the shift register. Place a 0.1 uF ceramic decoupling capacitor close to the supply pin. If the panel is large, consider a small ground plane section under the driver to reduce ground bounce between LED return currents and the logic interface.
Thông tin tuân thủ
Compliance status was not stated in the provided web data. Confirm RoHS/REACH status on the Microchip product page or distributor listing before procurement.
