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Analog Devices Inc./Maxim Integrated MAX1603EAI
- Part No.:
- MAX1603EAI
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Unclassified
- Package:
- Datasheet:
-
MAX1603EAI.pdf
- Description:
- IC CARDBUS DUAL & PCMCIA 28-SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:53,098
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Product details
Overview
MAX1603EAI from Maxim Integrated is a dual-channel CardBus/PCMCIA VCC/VPP power-switching IC with 28-pin SSOP package, -40°C to +85°C operating range, 0.14Ω max on-resistance for VY (3.3V) switches, 4A VCC output current capability, and integrated thermal shutdown, overcurrent fault flag, and soft-switching control. It delivers selectable 3.3V/5V VCC and 12V VPP to two PC Card sockets in notebook docking stations.
For engineers reviewing the MAX1603EAI datasheet, MAX1603EAI pinout, MAX1603EAI application, or MAX1603EAI equivalent, this page provides verified technical context, confirmed pin functions, real-world timing and protection behavior, and validated alternative options for PCMCIA power management designs requiring compliance with PCMCIA 3V/5V switching specifications.
Technical Context
The MAX1603EAI integrates two independent power-switching channels-each with separate VCC (VCCA/VCCB) and VPP (VPPA/VPPB) outputs-controlled via eight TTL/CMOS-compatible logic inputs (A0VCC–B1VPP) and a three-level CODE pin supporting Intel/Cirrus/Databook interface protocols. Its internal architecture includes regulating charge pumps enabling full 3.3V VCC switching even when +5V/+12V supplies are off.
It implements break-before-make switching, guaranteed 100µs VCC rise time (1µF load), 1ms VPP rise time (0.1µF load), undervoltage lockout (1.4V–2.9V threshold), and open-drain FAULT output asserting during overcurrent, thermal overload (>150°C), or UVLO events. Standby supply current is 1µA max with all control inputs at GND or high-Z.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VY On-Resistance | 0.14Ω max - enables 1A continuous 3.3V VCC delivery per channel with ≤140mV dropout |
| VX On-Resistance | 0.08Ω max - supports 1A 5V VCC loads with ≤80mV dropout under typical conditions |
| VCC Output Current | 4A max - internally current-limited to protect against sustained short-circuit faults |
| VPP Output Current | 250mA max - sufficient for PCMCIA card programming voltage (12V) with built-in foldback |
| Thermal Shutdown | +150°C trigger / +130°C recovery - prevents permanent damage during overload or poor heatsinking |
| Standby Supply Current | 1µA max - achieved when all control inputs are GND or high-Z, enabling ultra-low-power host sleep states |
| FAULT Output Type | Open-drain - requires external pull-up; asserts low during overcurrent, UVLO, or thermal fault |
| Operating Temperature | -40°C to +85°C - qualified for industrial and mobile computing environments including docking stations |
Pinout & Package
MAX1603EAI uses a 28-pin SSOP (0.2 inch / 5mm wide) package with exposed pad not electrically connected. Pin numbering follows standard SSOP top-view convention (pin 1 at top-left corner).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Power ground reference | Common return path for all internal switches and logic; must be low-impedance connection |
| A0VCC (Pin 27) | Channel A VCC control input | Logic-selects VCCA output source (VX or VY); part of 2-bit VCC address for socket A |
| A1VCC (Pin 26) | Channel A VCC control input | Completes 2-bit VCC address for socket A; determines whether VCCA outputs 3.3V or 5V |
| CODE (Pin 25) | Interface protocol selector | Configures logic decoder for Intel (GND), Cirrus (VL), or Databook (VL/2) controller compatibility |
| VCCA (Pins 7,22,24) | Channel A VCC output | Three parallel pins deliver low-impedance 3.3V/5V to CardBus socket A; total 4A capability |
| VY (Pins 19,21,23) | 3.3V supply input | Primary input for 3.3V VCC switching; must be ≥3.0V for proper operation; tied together externally |
| VCCB (Pins 9,18,20) | Channel B VCC output | Three parallel pins deliver low-impedance 3.3V/5V to CardBus socket B; shares same specs as VCCA |
| FAULT (Pin 17) | Fault status indicator | Open-drain output pulled low during overcurrent, thermal shutdown, or undervoltage lockout |
| B1VCC (Pin 16) | Channel B VCC control input | Second bit of 2-bit VCC address for socket B; used with B0VCC to select VCC source |
| B0VCC (Pin 15) | Channel B VCC control input | First bit of 2-bit VCC address for socket B; determines VCCB output voltage selection |
| A1VPP (Pin 2) | Channel A VPP control input | Selects VPPA output state (0V, 12V, or high-Z); part of 2-bit VPP address for socket A |
| A0VPP (Pin 3) | Channel A VPP control input | Completes 2-bit VPP address for socket A; controls 12V programming voltage delivery to socket A |
| 12INA (Pin 4) | Channel A 12V supply input | Input for 12V VPP switching on socket A; connects internally to VPPA switch; tie to VPPA if unused |
| VPPA (Pin 5) | Channel A VPP output | Delivers regulated 12V to CardBus socket A; 250mA max output with internal current limiting |
| VX (Pins 6,8,10) | 5V supply input | Primary input for 5V VCC switching; range 3.0V–5.5V; tied together externally for low impedance |
| VPPB (Pin 11) | Channel B VPP output | Delivers regulated 12V to CardBus socket B; identical specs and protection to VPPA |
| 12INB (Pin 12) | Channel B 12V supply input | Input for 12V VPP switching on socket B; connects internally to VPPB switch; tie to VPPB if unused |
| B0VPP (Pin 13) | Channel B VPP control input | First bit of 2-bit VPP address for socket B; selects VPPB output state (0V, 12V, or high-Z) |
| B1VPP (Pin 14) | Channel B VPP control input | Second bit of 2-bit VPP address for socket B; completes VPPB programming voltage control |
| VL (Pin 28) | Logic supply / shutdown input | 3.3V/5V logic rail input; pulling VL ≤2.3V forces full shutdown with 1µA supply current |
Key Features
| Feature | Design Value |
|---|---|
| Independent charge pumps | Enable full 3.3V VCC switching without requiring +5V/+12V supplies - critical for low-power CardBus modes |
| Soft-switching action | Guaranteed 100µs VCC rise time (1µF load) and 1ms VPP rise time (0.1µF load) limits inrush surge current |
| Break-before-make switching | Prevents VCC/VPP supply contention during voltage transitions - ensures safe hot-plug operation |
| Overcurrent/thermal fault flag | Single open-drain FAULT pin signals all protection events (overcurrent, UVLO, thermal shutdown) |
| Three-code interface compatibility | Hardware-selectable CODE pin supports Intel 82365SL, Cirrus CL-PD67XX, and Databook DB86184 controllers |
| Ultra-low standby current | 1µA max supply current in standby mode eliminates need for external enable sequencing |
Applications
| CardBus Docking Station Power Management | Notebook PCMCIA Slot Controller |
|---|---|
|
Use Scenario: Dual-socket docking station supplying power to simultaneous CardBus Ethernet and flash memory cards. IC Role / Device Role / Timing Role: Dual-channel VCC/VPP switch delivering 3.3V/5V to socket A and 12V to socket B with synchronized soft-start. Use Value: Enables concurrent high-current (1A) 3.3V operation and 12V programming without cross-talk or inrush-induced system reset. |
Use Scenario: Embedded notebook design integrating PCMCIA support with minimal BOM count and footprint. IC Role / Device Role / Timing Role: Single-chip replacement for discrete MOSFET + logic arrays; handles all VCC/VPP switching and fault reporting. Use Value: Reduces PCB area by >60% vs. discrete solution while guaranteeing PCMCIA-compliant rise/fall times and fault response. |
| Industrial Data Logger with Hot-Swappable Memory | Handheld Terminal with Dual PC Card Slots |
|
Use Scenario: Ruggedized data logger accepting SRAM and modem PC Cards in field-deployed units. IC Role / Device Role / Timing Role: Provides isolated, thermally protected 3.3V/12V switching with automatic fault latching via FAULT pin to host MCU. Use Value: Ensures reliable hot-insertion across -40°C to +85°C range with no external current-sense or thermal monitoring required. |
Use Scenario: Portable handheld terminal supporting both 3.3V Wi-Fi and 5V GPS PC Cards in compact form factor. IC Role / Device Role / Timing Role: Dual-voltage VCC selector (VX/VY) plus independent VPP control per socket enables mixed-card operation. Use Value: Eliminates need for separate 3.3V/5V regulators and manual card-detection logic; CODE pin auto-adapts to host controller. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel PCMCIA power-switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1600EAI | Identical pinout and logic interface; VY switch on-resistance is 0.08Ω max (vs. 0.14Ω for MAX1603EAI) | Better suited for high-current 3.3V-only CardBus systems where lower VCC dropout is critical | Select MAX1600EAI when 3.3V load currents exceed 800mA and <100mV dropout is required |
| TPS2300IPW | Single-channel, 3.3V/5V only (no VPP), 20-pin TSSOP, 0.07Ω max RDS(on), no integrated charge pump | Lacks 12V VPP support and dual-socket coordination; requires external 12V switching and sequencing logic | Choose only for simplified single-socket 3.3V/5V applications where VPP is handled separately |
Compared with MAX1600EAI, the MAX1603EAI trades lower 3.3V switch conduction loss for higher integration of VPP control and charge-pump autonomy; versus TPS2300IPW, it provides complete dual-socket CardBus power management in one device but with larger package and higher pin count.
Availability
MAX1603EAI is available at Aetrix Electronics and suitable for notebook docking stations, industrial data loggers, handheld terminals, and PCMCIA read/write drives requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX1603EAI 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 computing, communications, and industrial applications.
The MAX1600/MAX1603 product line was designed specifically for CardBus and PCMCIA host controller interfaces, delivering fully integrated, PCMCIA-spec-compliant VCC/VPP switching with minimal external components and robust fault protection.
FAQ
What is the key functional difference between MAX1603EAI and MAX1600EAI?
The MAX1603EAI and MAX1600EAI share identical pinout, package, logic interface, and feature set, but differ in VY switch on-resistance: MAX1603EAI specifies 0.14Ω max, while MAX1600EAI specifies 0.08Ω max. This makes MAX1600EAI preferable for high-current 3.3V VCC applications where lower conduction loss is critical. Both parts are drop-in replacements except for this parameter.
Does MAX1603EAI support 12V VPP generation without external components?
Yes, MAX1603EAI integrates internal regulating charge pumps that generate the 12V VPP output directly from the 12IN_ input. No external boost circuitry is required. The device delivers up to 250mA at VPPA/VPPB with built-in current limiting and thermal protection, meeting PCMCIA VPP specification requirements.
How does the FAULT pin behave during overcurrent events on MAX1603EAI?
During an overcurrent event exceeding 4A on VCC or 200mA on VPP, the MAX1603EAI disables the affected switch and asserts the open-drain FAULT pin low within 1µs. FAULT is not latched - it remains low only while the fault condition persists. If the overload continues, thermal shutdown activates at +150°C, also pulling FAULT low.
Can MAX1603EAI operate with only a 3.3V supply and no +5V or +12V inputs?
Yes. MAX1603EAI's independent charge pumps allow full 3.3V VCC switching (via VY) even when VX (+5V) and 12IN_ (+12V) are disconnected or powered down. This enables true low-power CardBus operation. However, VPP outputs require 12IN_ to be active, and VL must remain ≥2.8V for proper function.
What is the purpose of the CODE pin on MAX1603EAI, and how is it used?
The CODE pin configures the MAX1603EAI's logic decoder to match one of three industry-standard PC Card controller protocols: Intel 82365SL (CODE = GND), Cirrus CL-PD67XX (CODE = VL), or Databook DB86184 (CODE = VL/2). This eliminates firmware changes when swapping host controllers and ensures correct interpretation of A0VCC–B1VPP control signals.
MAX1603EAI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
MAX1603EAI FAQ
1.How can I place an order for MAX1603EAI through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1603EAI 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 MAX1603EAI reliable?
The price and inventory of MAX1603EAI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1603EAI is usually 5 days.
3.What payment methods are accepted for MAX1603EAI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1603EAI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1603EAI?
MAX1603EAI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1603EAI 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 MAX1603EAI?
For technical support, including MAX1603EAI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1603EAI requirements.
6.How does Aetrix verify that MAX1603EAI is sourced from the original manufacturer or authorized distributors?
All MAX1603EAI 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 MAX1603EAI meets industry standards.
7.What is the process for return or replacement of MAX1603EAI?
All MAX1603EAI units undergo pre-shipment inspection (PSI). If there is an issue with MAX1603EAI, 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 MAX1603EAI part is unused and in its original packaging.
Return procedure for MAX1603EAI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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