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Analog Devices Inc./Maxim Integrated MAX6959BAEE+
- Part No.:
- MAX6959BAEE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Display Drivers
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX6959BAEE+.pdf
- Description:
- IC DRVR 7 SEGMNT 4 DIGIT 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,922
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Product details
Overview
MAX6959BAEE+ from Maxim Integrated is a 2-wire SMBus/I²C-compatible LED display driver IC designed to interface microprocessors with common-cathode 7-segment displays and discrete LEDs. It drives up to four 7-segment digits (each with nine segments including decimal point), supports 64-step digital brightness control, delivers 23mA peak segment current, and integrates key-scan functionality for up to eight switches - used in industrial panel meters and vending machine front panels.
For engineers reviewing the MAX6959BAEE+ datasheet, MAX6959BAEE+ pinout, MAX6959BAEE+ application, or MAX6959BAEE+ equivalent, this page provides verified functional specifications, validated pin roles, confirmed automotive-grade (-40°C to +125°C) operation, and real-world keyscan debounce timing (41ms typ), enabling rapid integration into LED-driven HMI systems without design iteration.
Technical Context
The MAX6959BAEE+ implements a multiplexed common-cathode LED drive architecture with integrated anode/cathode drivers, static RAM digit storage, and hexadecimal font decoding logic. Its 2-wire interface uses fixed 0.8V/2.1V logic thresholds for guaranteed compatibility across 2.5V–5.5V host systems, even when powered at 5V.
It features dual configurable input ports (INPUT1/INPUT2) supporting either general-purpose logic input or automatic n-key rollover keyscan with hardware debouncing (30.3–63ms programmable window), plus IRQ/SEG9 pin configurable as open-drain interrupt output or 9th segment driver - all controlled via I²C register map including dedicated GPIO, key status, and configuration registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3V to 5.5V - enables direct interfacing with 3.3V microcontrollers while driving 5V LED anodes without level shifters. |
| LED Segment Drive | 23mA constant-current source - ensures consistent brightness across segments independent of VLED variation. |
| Brightness Control | 64-step digital adjustment - allows precise luminance tuning in embedded UIs without external PWM circuitry. |
| Display Capacity | 4 digits × 9 segments + 4 discrete LEDs (or 8 discrete LEDs if DP unused) - supports full alphanumeric numeric displays with status indicators. |
| Keyscan Capability | Up to 8 switches with automatic debounce and IRQ assertion - eliminates software polling overhead and firmware debounce logic. |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive, industrial control cabinets, and white goods environments. |
| I²C Speed | 400kbps - supports fast update rates for dynamic displays (e.g., real-time sensor readouts). |
Pinout & Package
MAX6959BAEE+ is housed in a 16-pin QSOP package (package code E16-1), measuring 10.0mm × 3.9mm × 1.4mm, with standard 0.65mm lead pitch and exposed pad for thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: SDA | Serial Data I/O | Open-drain bidirectional bus line - requires external pullup; handles command/data transfer and ACK/NACK handshaking per I²C protocol. |
| 2: SCL | Serial Clock Input | Asynchronous clock input - synchronizes all data transfers; logic high threshold fixed at 2.1V for mixed-voltage system robustness. |
| 3: IRQ/SEG9 | Configurable Output | Either open-drain interrupt (asserted on key event) or 9th segment driver - selected via CONFIG register bit; eliminates need for external IRQ routing logic. |
| 4–7, 11–15: DIG0/SEG0–DIG3/SEG3 | Dual-Function Digit/Segment Drivers | Sink cathode current (DIG mode) or source anode current (SEG mode) - enables flexible wiring for single/dual-digit or bicolor displays without external transistors. |
| 8: GND | Ground Reference | Primary return path for LED sink currents and logic - must be low-impedance to minimize EMI from slew-rate-limited segment switching. |
| 9: INPUT1 | Configurable Key/Logic Input | Internal 26.5µA pullup; supports keyscan matrix row/column scanning or GPIO read - no external biasing required. |
| 10: INPUT2 | Configurable Key/Logic Input | Identical function to INPUT1; enables full 8-switch matrix when both inputs assigned to keyscan mode. |
| 16: V+ | Positive Supply | 3V–5.5V power input - powers internal logic, drivers, and pullups; regulates internal current sources independently of VLED. |
Key Features
| Feature | Design Value |
|---|---|
| Slew-rate-limited segment drivers | 11mA/µs max dI/dt - reduces electromagnetic interference during multiplexed LED switching, easing EMC compliance in industrial enclosures. |
| Hexadecimal decode/no-decode per digit | Independent decode-mode bits for each digit - enables mixed display formats (e.g., hex addresses + decimal values) without host CPU intervention. |
| 20µA shutdown current with data retention | Preserves digit/segment register contents during sleep - allows instant display restore after wake-up, critical for battery-backed HMIs. |
| Scan-limit register (1–4 digits) | Adjusts multiplex ratio dynamically - maintains consistent per-digit brightness regardless of active digit count, avoiding visual flicker or dimming. |
| Factory-trimmed segment current matching | ±4% matching across all segments - ensures uniform luminance across multi-digit displays without per-segment calibration. |
Applications
| Industrial Panel Meters | Vending Machine UI |
|---|---|
|
Use Scenario: Real-time display of voltage, current, or flow rate in DIN-rail mounted instrumentation. IC Role / Device Role / Timing Role: Primary LED driver controlling 4-digit numeric display with decimal point and status LEDs; manages scan timing at 780Hz typical. Use Value: Integrated brightness control and shutdown mode enable adaptive display visibility under varying ambient light and low-power standby states. |
Use Scenario: Front-panel display showing product selection codes, price, and credit balance in coin- or card-operated dispensers. IC Role / Device Role / Timing Role: Dual-role controller - drives 4-digit price display while scanning 8 keypad buttons with hardware debounce and IRQ notification. Use Value: Eliminates need for separate keyscan MCU peripheral or external debounce RC networks, reducing BOM count and firmware complexity. |
| Audio/Video Equipment | White Goods Control Panels |
|
Use Scenario: Channel, volume, or timer display on AV receivers and soundbars with tactile button feedback. IC Role / Device Role / Timing Role: Display driver with integrated keyscan handling momentary button presses for menu navigation and parameter entry. Use Value: IRQ output enables immediate microcontroller response to user input without polling, improving perceived responsiveness. |
Use Scenario: Cycle status, temperature, and time display on washing machines, dishwashers, and ovens with membrane keypad interface. IC Role / Device Role / Timing Role: Single-chip solution managing both LED segment outputs and 8-key matrix scanning in thermally demanding environments. Use Value: Automotive-grade temperature rating (-40°C to +125°C) ensures reliable operation inside appliance control boards near heating elements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED display driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6958AAEE+ | Lacks INPUT1/INPUT2 pins and IRQ/SEG9 configurability; no keyscan capability; SEG9 fixed as segment output. | Suitable only for display-only applications without user input; cannot replace MAX6959BAEE+ in keyscan designs. | Select MAX6958AAEE+ only when keyscan is unnecessary and cost reduction is prioritized over feature flexibility. |
| TLC59282DBQR | 16-channel constant-current sink driver; no integrated keyscan, no I²C address auto-increment, no decode mode; requires external microcontroller for digit multiplexing. | Used in discrete LED arrays or bar graphs - not optimized for 7-segment numeric displays or HMI front panels. | Choose TLC59282DBQR for high-channel-count indicator banks where segment-level control is needed but digit decoding and keyscan are handled externally. |
Compared with MAX6958AAEE+, MAX6959BAEE+ adds hardware keyscan and IRQ signaling at identical display performance; versus TLC59282DBQR, it integrates display formatting, multiplex timing, and input scanning - reducing host MCU load and PCB footprint in HMI applications.
Availability
MAX6959BAEE+ is available at Aetrix Electronics and suitable for industrial panel meters, vending machine UIs, and white goods control panels requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6959BAEE+ 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 semiconductor company specializing in precision analog, mixed-signal, and power management ICs for industrial, automotive, and communications applications.
The MAX6958/MAX6959 product line was engineered specifically for space-constrained, low-software-overhead human-machine interfaces - integrating LED drive, display formatting, and keyscan in a single 16-pin package to simplify front-panel design.
FAQ
What is the primary function of the MAX6959BAEE+ in an LED display system?
The MAX6959BAEE+ serves as a compact, I²C-controlled LED display driver that manages multiplexed common-cathode 7-segment digits and discrete LEDs while simultaneously scanning up to eight mechanical key switches. It offloads display formatting, brightness control, and key debouncing from the host microcontroller - making it ideal for front-panel HMIs where firmware resources are constrained.
Does the MAX6959BAEE+ support both hexadecimal decoding and raw segment control?
Yes, the MAX6959BAEE+ supports per-digit hexadecimal decode/no-decode selection via its decode-mode register. When enabled, it maps 4-bit hex values (0–F) to standard 7-segment patterns; when disabled, all 8 bits of each digit register directly control individual segments (a–g, DP), enabling custom symbols or bar-graph indicators - all without changing the MAX6959BAEE+ hardware configuration.
How does the keyscan functionality of the MAX6959BAEE+ reduce firmware development effort?
The MAX6959BAEE+ performs automatic matrix scanning and hardware debouncing of up to eight switches, reporting results via dedicated status registers (0x08 and 0x0C) or asserting IRQ/SEG9. This eliminates the need for time-critical polling loops, timer-based debounce routines, or external RC filters - significantly simplifying host firmware and improving reliability in noisy industrial environments.
What is the significance of the 23mA segment current specification for the MAX6959BAEE+?
The 23mA peak segment current is a factory-trimmed, internally regulated source current that ensures consistent LED brightness across all segments and supply voltages (3V–5.5V). This eliminates external current-setting resistors, reduces thermal variance between segments, and guarantees uniform luminance in multi-digit displays - a critical requirement for professional-grade instrumentation using the MAX6959BAEE+.
Can the MAX6959BAEE+ operate reliably in automotive under-hood applications?
Yes, the MAX6959BAEE+ is fully specified over -40°C to +125°C and qualified for automotive temperature ranges. Its robust 2-wire interface with fixed 0.8V/2.1V logic thresholds, slew-rate-limited drivers, and internal current regulation ensure stable operation in thermally aggressive environments - such as engine control modules or infotainment front panels where the MAX6959BAEE+ may be deployed.
MAX6959BAEE+ 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 + 2 Annunciators
- Interface:
- SMBus (2-Wire/I2C)
- Digits or Characters:
- 4 Digits
- Current - Supply:
- 5.9 mA
- Voltage - Supply:
- 3V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QSOP
MAX6959BAEE+ FAQ
1.How can I place an order for MAX6959BAEE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6959BAEE+ 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 MAX6959BAEE+ reliable?
The price and inventory of MAX6959BAEE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6959BAEE+ is usually 5 days.
3.What payment methods are accepted for MAX6959BAEE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6959BAEE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6959BAEE+?
MAX6959BAEE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6959BAEE+ 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 MAX6959BAEE+?
For technical support, including MAX6959BAEE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6959BAEE+ requirements.
6.How does Aetrix verify that MAX6959BAEE+ is sourced from the original manufacturer or authorized distributors?
All MAX6959BAEE+ 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 MAX6959BAEE+ meets industry standards.
7.What is the process for return or replacement of MAX6959BAEE+?
All MAX6959BAEE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6959BAEE+, 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 MAX6959BAEE+ part is unused and in its original packaging.
Return procedure for MAX6959BAEE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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