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Analog Devices Inc./Maxim Integrated MAX6950CEE+
- Part No.:
- MAX6950CEE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Display Drivers
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX6950CEE+.pdf
- Description:
- IC DRVR 7 SEGMNT 5 DIGIT 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:645
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Product details
Overview
The MAX6950CEE+ from Maxim Integrated is a 5-digit, common-cathode LED display driver IC with SPI/QSPI/MICROWIRE-compatible serial interface, +2.7V to +5.5V operation, 26MHz max interface clock, 40mA segment source current, and integrated hexadecimal decoder for 7-segment numeric digits - used in panel meters and industrial instrumentation displays.
For engineers reviewing the MAX6950CEE+ datasheet, MAX6950CEE+ pinout, MAX6950CEE+ application, or MAX6950CEE+ equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternatives, and supply-ready procurement details - all grounded in Maxim's official documentation for the MAX6950CEE+ variant.
Technical Context
The MAX6950CEE+ implements a multiplexed common-cathode LED drive architecture with dual-plane digit RAM (P0/P1) enabling synchronized blinking across digits. It uses an internal RC oscillator (4MHz typical, set via RSET/CSET on pins 7/9) or accepts external 1–8MHz clock on OSC (pin 9) to control scan rate (625Hz at 8-digit mode, 1kHz at 5-digit mode).
Its 16-bit SPI interface operates with CS-active-low framing, rising-edge CLK sampling, and supports individual digit updates without full display rewrite. The device integrates digital brightness control (16-step PWM), slew-rate-limited segment drivers (35mA/µs), and shutdown mode retaining RAM data while drawing only 75µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Display Capacity | Drives up to five 7-segment digits (40 segments total) - defines maximum LED count per device without external buffering. |
| Supply Voltage Range | +2.7V to +5.5V - enables direct compatibility with 3.3V and 5V logic systems without level-shifting. |
| Segment Source Current | −40mA (typical at V+ = 3.3V, VLED = 2.4V) - sets peak current capability per segment line for brightness control. |
| Interface Speed | 26MHz max SPI clock - supports high-throughput display updates in fast-changing UI applications. |
| Scan Rate (5-digit) | ~1kHz (at fOSC = 4MHz) - ensures flicker-free visibility with >60Hz effective refresh per digit. |
| Shutdown Current | 75µA (typical, data retained) - enables low-power standby in battery-backed instrumentation. |
| Brightness Control | 16-step digital PWM (intensity register) - allows precise luminance tuning without analog components. |
Pinout & Package
MAX6950CEE+ is housed in a 16-pin QSOP-EP (exposed pad) package with 0.635mm pitch, thermal pad connected to GND for enhanced power dissipation in continuous LED drive operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DIN (Pin 1) | Serial data input | Accepts 16-bit command/data words (D15–D0); sampled on CLK rising edge when CS is low. |
| CLK (Pin 2) | Serial clock input | Edge-triggered clock for shift register; idle state (high/low) is flexible; inactive when CS is high. |
| DIG0–DIG4 / SEG0–SEG7 (Pins 3–6, 10–14) | Multiplexed digit sink / segment source | Shared pins support both digit cathode sinking and segment anode sourcing - requires specific wiring per Table 1 for correct 5-digit operation. |
| ISET (Pin 7) | Current and oscillator setting | Connects to GND via RSET (e.g., 56kΩ) to set segment current and internal OSC frequency jointly with CSET. |
| GND (Pin 8) | Ground reference | Primary return path for LED currents and logic; exposed pad must be soldered to PCB ground plane. |
| OSC (Pin 9) | Multiplex clock input/output | Configurable as RC oscillator node (with CSET to GND) or external 1–8MHz clock input - determines scan and blink timing. |
| CS (Pin 15) | Chip-select input | Active-low enable for serial interface; latches 16-bit word on rising edge; required for all register writes. |
| V+ (Pin 16) | Positive supply | +2.7V to +5.5V input; requires local 0.1µF ceramic bypass capacitor to GND for stable operation. |
Key Features
| Feature | Design Value |
|---|---|
| Hexadecimal decode/no-decode per digit | Enables mixed-mode displays - e.g., digits 0–3 decoded (0–9, A–F), digits 4–4 no-decode for bar-graph or custom symbols. |
| Slew-rate limited segment drivers | 35mA/µs dI/dt limits EMI emissions during segment switching - reduces need for external filtering in EMC-sensitive designs. |
| Synchronized blinking across multiple drivers | Global blink timing sync (via T bit in config register) ensures uniform blink phase across cascaded MAX6950CEE+ units in multi-display systems. |
| Individual digit addressability | Direct write to any digit register (e.g., 0x20–0x24 for P0 digits 0–4) enables partial updates - avoids full 5-digit rewrite for single-digit changes. |
| Power-up blanking & shutdown retention | Display blanks on POR; shutdown mode retains digit RAM and config registers while drawing <100µA - critical for fail-safe UI behavior. |
Applications
| Panel Meters | Industrial Controllers |
|---|---|
Use Scenario: Front-panel numeric readout in programmable logic controller (PLC) I/O modules showing process variables like temperature or pressure. IC Role / Device Role / Timing Role: LED display driver handling multiplexed 5-digit common-cathode digits with real-time update via SPI from microcontroller. Use Value: Eliminates discrete transistor arrays and timing logic; reduces BOM count by integrating decoder, RAM, and current drivers in one 16-pin IC. | Use Scenario: Operator interface on factory-floor HMI panels requiring reliable, low-EMI numeric feedback under electromagnetic noise. IC Role / Device Role / Timing Role: Segment driver with slew-rate control and shutdown mode - manages LED current and minimizes conducted emissions during scan cycles. Use Value: Meets EN 61000-6-3 Class A radiated emission limits without added ferrites or shielding due to controlled dI/dt. |
| Set-Top Boxes | Medical Equipment |
Use Scenario: Channel or timer display on legacy cable/satellite STB front panels using discrete 7-segment LEDs. IC Role / Device Role / Timing Role: Serially interfaced display controller decoding hex values and managing intensity via software-configurable PWM. Use Value: Enables firmware-driven brightness adjustment and blinking indicators (e.g., recording status) without hardware modification. | Use Scenario: Vital sign monitor displaying heart rate or SpO₂ with guaranteed readability and fail-safe blanking on power loss. IC Role / Device Role / Timing Role: Display driver with power-up blanking and RAM-retentive shutdown - ensures display remains off until initialized. Use Value: Prevents misleading "ghost" digits during boot or brownout, supporting IEC 62304 safety requirements for medical UIs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED display driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6951CEE+ | 8-digit capacity (vs. 5-digit), identical pinout and interface; adds three extra digit drivers (DIG5–DIG7) - otherwise functionally identical register map and timing. | Supports larger displays (e.g., 6–8 digit readouts); not drop-in for 5-digit-only layouts where unused DIG5–DIG7 pins may float or require termination. | Select MAX6951CEE+ only if 6–8 digits are needed; MAX6950CEE+ saves cost and layout space for ≤5-digit applications. |
| TM1650 | I²C interface (not SPI), 4-digit + 4-key scan, no external RSET/CSET - integrated oscillator, lower segment current (15mA), no blink sync across devices. | Suited for compact consumer UIs with key scanning; lacks synchronized blinking, slew-rate control, and high-current drive for industrial LEDs. | Choose TM1650 for cost-sensitive, space-constrained I²C systems; MAX6950CEE+ preferred for SPI-based industrial designs needing EMI control and robust LED drive. |
Compared with MAX6951CEE+, the MAX6950CEE+ offers optimized cost and footprint for 5-digit applications without redundant drivers; versus TM1650, it provides higher segment current, SPI flexibility, and system-level EMI mitigation - making it the engineering choice for demanding industrial LED interfaces.
Availability
MAX6950CEE+ is available at Aetrix Electronics and suitable for panel meters, industrial controllers, and medical equipment requiring stable component supply, long-term lifecycle support, and guaranteed authentic Maxim Integrated product traceability.
Supply support for MAX6950CEE+ 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
Maxim Integrated (now part of Analog Devices) is a U.S.-based semiconductor company specializing in precision analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX6950CEE+ belongs to Maxim's serial LED display driver product line, designed specifically for microprocessor-controlled 7-segment displays in harsh environments where reliability, low EMI, and flexible digit configuration are critical.
FAQ
What is the maximum number of 7-segment digits the MAX6950CEE+ can drive?
The MAX6950CEE+ drives up to five 7-segment digits (40 individual LED segments). This is fixed by its internal architecture - unlike the pin-compatible MAX6951CEE+, it lacks digit drivers DIG5–DIG7. Attempting to connect more than five digits results in unlit segments for the unsupported positions, as confirmed in Maxim's datasheet section "Differences Between MAX6950 and MAX6951". The MAX6950CEE+ is optimized for compact 5-digit displays in panel meters and instrumentation.
Does the MAX6950CEE+ support both internal and external clock sources for display multiplexing?
Yes, the MAX6950CEE+ supports both clocking modes via its OSC pin (pin 9). With an external resistor (RSET) and capacitor (CSET) connected to GND, it uses an internal RC oscillator (typically 4MHz). Alternatively, OSC accepts an external 1–8MHz TTL/CMOS clock signal - enabling precise, system-synchronized scan and blink timing. This dual-mode flexibility is documented in the Electrical Characteristics table and "Multiplex Clock and OSC Oscillator" section of the MAX6950CEE+ datasheet.
How does the MAX6950CEE+ implement digital brightness control?
The MAX6950CEE+ implements digital brightness control via a 4-bit intensity register (address 0x02) that configures a 16-step PWM modulator. Each step scales the average segment current from 1/16 to 15/16 of the peak current set by ISET. This allows software-adjustable luminance without external DACs or potentiometers - a feature explicitly listed in the "Features" section and detailed in the "Intensity Register" subsection of the MAX6950CEE+ datasheet.
Can the MAX6950CEE+ drive common-anode LED displays?
No, the MAX6950CEE+ is designed exclusively for common-cathode LED configurations. Its DIGx pins sink current from digit cathodes, and SEGx pins source current to segment anodes - a topology incompatible with common-anode displays. Attempting to use it with common-anode LEDs would reverse bias the internal drivers and prevent proper operation. This limitation is stated in the "General Description" and reinforced in the "Detailed Description" section of the MAX6950CEE+ datasheet.
What happens to display data during power-up or shutdown of the MAX6950CEE+?
On power-up, the MAX6950CEE+ blanks the display and enters shutdown mode with all digit registers cleared and intensity set to minimum (1/16). In shutdown mode (S bit = 0), the scan oscillator halts, drivers go high-impedance, but digit and configuration register contents are fully retained - allowing immediate resumption of display after wake-up. This behavior is defined in Tables 4 (Initial Power-Up Register Status) and 6 (Shutdown Control) of the MAX6950CEE+ datasheet.
MAX6950CEE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Display Type:
- LED
- Configuration:
- 7 Segment
- Interface:
- 3-Wire Serial
- Digits or Characters:
- 5 Digits
- Current - Supply:
- 10 mA
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QSOP
MAX6950CEE+ FAQ
1.How can I place an order for MAX6950CEE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6950CEE+ 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 MAX6950CEE+ reliable?
The price and inventory of MAX6950CEE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6950CEE+ is usually 5 days.
3.What payment methods are accepted for MAX6950CEE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6950CEE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6950CEE+?
MAX6950CEE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6950CEE+ 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 MAX6950CEE+?
For technical support, including MAX6950CEE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6950CEE+ requirements.
6.How does Aetrix verify that MAX6950CEE+ is sourced from the original manufacturer or authorized distributors?
All MAX6950CEE+ 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 MAX6950CEE+ meets industry standards.
7.What is the process for return or replacement of MAX6950CEE+?
All MAX6950CEE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6950CEE+, 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 MAX6950CEE+ part is unused and in its original packaging.
Return procedure for MAX6950CEE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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