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Analog Devices Inc./Maxim Integrated MAX6959BAEE+T
- Part No.:
- MAX6959BAEE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Display Drivers
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX6959BAEE+T.pdf
- Description:
- IC DRVR 7 SEGMNT 4 DIGIT 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,366
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Product details
Overview
MAX6959BAEE+T from Maxim Integrated is a 2-wire SMBus/I²C-compatible LED display driver IC for common-cathode 7-segment displays, supporting up to four 9-segment digits plus eight discrete LEDs or 36 discrete LEDs. It integrates key-scan functionality with two configurable input ports (INPUT1/INPUT2), 64-step digital brightness control, and 23mA constant-current segment drive. It targets front-panel user interfaces in industrial controls and vending machines.
For engineers reviewing the MAX6959BAEE+T datasheet, MAX6959BAEE+T pinout, MAX6959BAEE+T application, or MAX6959BAEE+T equivalent, this page delivers verified electrical parameters, validated key-scan debounce timing (41ms typ), confirmed IRQ/SEG9 dual-mode operation, and precise package mapping to 16-pin QSOP (E16-1).
Technical Context
The MAX6959BAEE+T implements a multiplexed common-cathode LED driver architecture with integrated hexadecimal font decode, static RAM digit storage, and slew-rate-limited segment drivers to suppress EMI. Its 2-wire interface uses fixed 0.8V/2.1V logic thresholds for robust 2.5V/3.3V system compatibility while powered from 3V–5.5V.
Unlike the MAX6958, the MAX6959BAEE+T includes two dedicated input ports supporting n-key rollover key matrix scanning (up to 8 switches) with automatic hardware debouncing and interrupt generation via IRQ/SEG9. Its configuration register bit D distinguishes it from MAX6958 and enables host software detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3V to 5.5V - supports direct integration into mixed-voltage systems without level shifters. |
| LED Segment Drive | 23mA constant current - ensures consistent brightness across segments and temperature (-40°C to +125°C). |
| Brightness Control | 64-step digital adjustment - enables fine-grained intensity tuning without external PWM circuitry. |
| Scan Rate | 510–1050Hz - eliminates visible flicker while maintaining low average power consumption. |
| Keyscan Debounce | 30.3–63ms (41ms typ) - hardware-accelerated filtering eliminates need for firmware debounce routines. |
| I²C/SMBus Speed | 400kbps - enables fast display updates and key status polling in real-time UI applications. |
| Shutdown Current | 20µA - retains RAM data and enables rapid wake-up for battery-sensitive designs. |
Pinout & Package
MAX6959BAEE+T is housed in a 16-pin QSOP package (package code E16-1), measuring 4.0mm × 5.0mm with 0.635mm pitch, rated for -40°C to +125°C automotive operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SDA | Serial Data I/O | Open-drain bidirectional bus line - requires external pullup; compatible with SMBus timeout and arbitration. |
| 2 SCL | Serial Clock Input | CMOS input with fixed 0.8V/2.1V thresholds - ensures reliable timing across 2.5V/3.3V masters. |
| 3 IRQ/SEG9 | Configurable Output | Either open-drain interrupt (key event) or 9th segment source driver - selected via configuration register. |
| 4–7, 11–15 DIG0/SEG0–DIG3/SEG3 | Dual-Function Terminals | Sink cathodes of 4 digits (DIGx) or source anodes of 8 discrete LEDs (SEGx) - shared pins reduce PCB routing. |
| 8 GND | Ground Reference | Primary return path for all LED sink currents and logic - must be low-impedance for EMI control. |
| 9 INPUT1 | Keyscan/Logic Input | Internal 26.5µA pullup - configured as keyscan port (4 switches) or general-purpose input via register. |
| 10 INPUT2 | Keyscan/Logic Input | Identical to INPUT1 - enables full 8-switch matrix when both inputs are assigned to keyscan mode. |
| 16 V+ | Positive Supply | 3V–5.5V input powering all analog/digital blocks - decoupling capacitor required per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Keyscan Engine | Scans and debounces up to 8 switches with n-key rollover - offloads MCU and guarantees deterministic response. |
| IRQ/SEG9 Dual-Mode Pin | Configurable interrupt output or 9th segment driver - maximizes flexibility without adding pins or external logic. |
| Slew-Rate-Limited Drivers | 11mA/µs segment current transition - reduces radiated emissions to meet Class B EMC requirements. |
| Hexadecimal Font Decode | On-chip mapping for 0–9, A–F characters - eliminates host-side font tables and simplifies firmware. |
| Automotive Temperature Range | -40°C to +125°C operation - qualified for under-hood and industrial panel meter environments. |
Applications
| Industrial Panel Meters | Vending Machine UI |
|---|---|
Use Scenario: Real-time display of weight, pressure, or flow rate with tactile keypad entry. IC Role / Device Role / Timing Role: LED driver and keyscan controller - manages 4-digit numeric display and 8-button matrix simultaneously. Use Value: Single-chip solution reduces BOM count and eliminates separate keyscan IC, lowering system cost and board area. |
Use Scenario: Product selection display and payment keypad on beverage dispensers. IC Role / Device Role / Timing Role: Display driver with interrupt-driven key detection - wakes MCU only on valid keypress after 41ms hardware debounce. Use Value: 20µA shutdown current extends battery life in backup-power configurations during idle periods. |
| White Goods Control Panels | Audio/Video Equipment Front Panels |
Use Scenario: Oven timer and cycle status display with rotary encoder or pushbutton inputs. IC Role / Device Role / Timing Role: Common-cathode digit driver with brightness control - adjusts display intensity based on ambient light sensor input. Use Value: 64-step digital dimming avoids flicker-prone PWM and simplifies host MCU timing constraints. |
Use Scenario: Channel number and volume level display on AV receivers with menu navigation buttons. IC Role / Device Role / Timing Role: Multiplexed 4-digit driver with IRQ signaling - alerts host of keypress without continuous polling overhead. Use Value: 400kbps I²C interface enables sub-millisecond display updates during fast menu scrolling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED display driver with keyscan applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6959AAEE+ | Same functionality but slave address 0111000 (A0 = GND); MAX6959BAEE+T uses 0111001 (A0 = V+). | Requires different I²C address configuration in host firmware; identical pinout and electrical behavior. | Select MAX6959BAEE+T when bus requires second address slot or when A0 tied to V+ simplifies layout. |
| TCA6424AIPWR | I²C GPIO expander with no integrated LED drivers, no font decode, no keyscan engine, no brightness control. | Only suitable if external LED drivers and firmware-based keyscan are acceptable; adds design complexity. | Choose MAX6959BAEE+T when integrated display + keyscan functionality is required to minimize component count. |
Compared with MAX6959AAEE+, MAX6959BAEE+T offers identical performance but enables dual-device I²C bus sharing; versus TCA6424AIPWR, it delivers complete front-panel subsystem integration-eliminating external drivers, reducing firmware burden, and guaranteeing hardware-debounced key response.
Availability
MAX6959BAEE+T 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+T 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 high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX6958/MAX6959 product line was designed specifically for space-constrained front-panel interfaces requiring integrated LED driving, alphanumeric display control, and hardware-accelerated key scanning in harsh environments.
FAQ
What is the I²C slave address of MAX6959BAEE+T?
The MAX6959BAEE+T has a fixed 7-bit I²C slave address of 0111001 (0x39), determined by internal hardwiring of address bit A0 to V+. This differs from MAX6959AAEE+ (0111000 / 0x38), enabling two devices on the same bus. The R/W bit makes the full write address 0x72 and read address 0x73. Address verification is supported via the Option bit (D) in the configuration register.
How does the IRQ/SEG9 pin function on MAX6959BAEE+T?
The IRQ/SEG9 pin on MAX6959BAEE+T is configurable via the GPIO register: it operates either as an open-drain interrupt output (asserted on debounced key events) or as the 9th segment source driver. When used as IRQ, it requires an external pullup resistor; as SEG9, it sources up to 23mA. The mode is software-selectable and does not require hardware changes.
Can MAX6959BAEE+T drive bicolor LED digits?
Yes, MAX6959BAEE+T can drive bicolor single-digit displays by treating each color as a separate digit - connecting red anodes to SEG0–SEG7 and green anodes to SEG4–SEG7 (or using dual-digit wiring). Its multiplexing architecture supports independent control of each segment pair, and the scan-limit register accommodates the doubled digit count required for color separation.
What is the maximum number of switches supported by MAX6959BAEE+T keyscan?
MAX6959BAEE+T supports up to eight mechanical switches using its two input ports (INPUT1 and INPUT2), each configurable for four-key matrix scanning with n-key rollover. Debounce time is fixed at 41ms (typical) and cannot be adjusted in hardware; status is reported via IRQ or polled registers (0x08 and 0x0C), with no firmware debounce required.
Does MAX6959BAEE+T retain display data during shutdown mode?
Yes, MAX6959BAEE+T retains all digit and segment register data in static RAM during shutdown mode, drawing only 20µA. Display content remains intact and reappears immediately upon exit from shutdown (S bit cleared in configuration register), enabling instant UI restoration without host reinitialization or data reload.
MAX6959BAEE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX6959BAEE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6959BAEE+T 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+T reliable?
The price and inventory of MAX6959BAEE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6959BAEE+T is usually 5 days.
3.What payment methods are accepted for MAX6959BAEE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6959BAEE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6959BAEE+T?
MAX6959BAEE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6959BAEE+T 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+T?
For technical support, including MAX6959BAEE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6959BAEE+T requirements.
6.How does Aetrix verify that MAX6959BAEE+T is sourced from the original manufacturer or authorized distributors?
All MAX6959BAEE+T 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+T meets industry standards.
7.What is the process for return or replacement of MAX6959BAEE+T?
All MAX6959BAEE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6959BAEE+T, 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+T part is unused and in its original packaging.
Return procedure for MAX6959BAEE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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