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MAX735CSA from MAXIM,MAXIM - Dallas Semiconductor

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MAX735CSA

Manufacturer: MAXIM, MAX

-5V/Adjustable, Negative-Output,Inverting, Current-mode PWM Regulators
Partnumber Manufacturer Quantity Availability
MAX735CSA MAXIM, MAX 885 In Stock

Description and Introduction

-5V/Adjustable, Negative-Output,Inverting, Current-mode PWM Regulators The MAX735CSA is a serial-interfaced, peripheral integrated circuit (IC) manufactured by Maxim Integrated. Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Specifications:**
- **Manufacturer:** Maxim Integrated  
- **Part Number:** MAX735CSA  
- **Package:** 8-pin SOIC (Small Outline Integrated Circuit)  
- **Interface:** I²C-compatible 2-wire serial interface  
- **Operating Voltage:** 2.7V to 5.5V  
- **Operating Temperature Range:** 0°C to +70°C  
- **Keypad Scanning:** 8x8 matrix (supports up to 64 keys)  
- **Debounce Time:** Programmable (typ. 10ms)  
- **Interrupt Output:** Active-low open-drain (for key-press detection)  
- **Power Consumption:** Low standby current (typ. 2.5µA)  

### **Description:**  
The MAX735CSA is a keypad interface IC that simplifies interfacing a matrix keypad to a microcontroller via an I²C serial bus. It eliminates the need for multiple GPIO pins by handling key scanning and debouncing internally.  

### **Features:**  
- I²C-compatible serial interface (supports 400kHz operation)  
- Internal pull-up resistors for keypad inputs  
- Programmable debounce time for reliable key detection  
- Interrupt output for efficient key event notification  
- Supports multiple key presses (up to 2-key rollover)  
- Low-power operation suitable for battery-powered devices  
- Compact 8-pin SOIC package for space-constrained designs  

This information is based solely on manufacturer-provided data. For further details, refer to the official Maxim Integrated datasheet.

Application Scenarios & Design Considerations

-5V/Adjustable, Negative-Output,Inverting, Current-mode PWM Regulators

Alternative Part Number

  • LT1073CS8 --: Inverting switching regulator in an 8-pin SOIC package with comparable input voltage range and output current, suitable as a functional substitute for the MAX735.
  • MC34063ACD --: Widely available inverting/step-down/step-up DC-DC converter in SOIC-8, pin-compatible in function and commonly used as a drop-in replacement for MAX735 designs.
  • LM2596S-5.0 --: Robust step-down regulator in a similar SOIC package with higher current capability; usable where the MAX735's inverting function can be reworked, offering good availability and cost.
  • LTC1144CS8 --: Pin-compatible switched-capacitor voltage inverter in an 8-pin SOIC package with comparable input range and output current, widely used as a MAX735 substitute.
  • ICL7660SCPA --: Classic CMOS voltage converter/inverter offering similar negative-supply generation function; check package (DIP-8) and current rating against the design.
  • TC7660SCPA --: Low-cost charge-pump voltage inverter functionally equivalent to the MAX735 family; verify package and output current requirements before substitution.
  • LM2575-5.0 --: Simple switcher regulator usable in inverting configurations with comparable current rating; mature, low-cost, and easy to source as a functional substitute.

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