DIO1568 Dual Sim Card Analoge Switch, for 2FF USIM, FPC Cable support

Description

The DIO1568 Evaluation Board (EVB) lets you quickly evaluate and prototype with the DIO1568 low-power, dual-SIM analog switch. The DIO1568 is a quad SPDT analog switch optimized for dual-SIM card multiplexing, operating from a single 1.65 V to 5.5 V supply. It offers ultra-low on-resistance (0.85 Ω on the SIM path) and fast, break-before-make switching thanks to sub-micron CMOS fabrication. The device also maintains very low quiescent current even when control voltage is below VCC, enabling direct interfacing with baseband processor GPIOs in mobile handsets. Two compact QFN package options are available: QFN1.8×2.6-16 and QFN3×3-16.

Features

• Switch type: Quad SPDT (4×)
• Supply voltage: 1.65 V to 5.5 V
• Low on-resistance: 0.85 Ω (SIM path); 2.7 Ω (other paths)
• Capacitance: 20 pF CON at DAT/CLK/RST path
• Low quiescent power consumption (suitable for battery-powered devices)
• Package options: 16‑lead QFN 1.8×2.6 mm and 16‑lead QFN 3×3 mm

Specifications

• Topology: 4× SPDT analog switch
• Operating voltage range: 1.65–5.5 V
• On-resistance: 0.85 Ω (SIM path) / 2.7 Ω (other paths)
• Input/output capacitance: ~20 pF on DAT/CLK/RST lines
• Control: Designed for break-before-make operation
• Quiescent current: Very low, remains low when control voltage < VCC
• Packages: QFN1.8×2.6-16, QFN3×3-16

Applications

• Cell phones and PDAs (dual-SIM designs)
• Set-top boxes
• Digital cameras
• Notebooks and laptops
• TV / LCD monitors

Development Board Configuration

The detailed assignment of the peripheral interfaces on the Development board is as follows:

DB Pionut

Pin Describtion

For switching between two SIM cards, you can connect the Select pin (pin header P3) to ground or VCC manually with a jumper, or you can control this pin using a microcontroller to set it high or low.

Connections

Dimentions

How the EVB Helps — Faster, Easier Design

• Rapid evaluation of electrical performance (on-resistance, switching, leakage) without PCB redesign.
• Reference layout and footprint for the QFN packages remove guesswork and speed board bring-up.
• Breakout connections for SIM DAT/CLK/RST and control pins allow quick functional tests and firmware integration.
• Pre-routed decoupling and recommended component placements reduce signal issues and shorten debug time.
• Demonstrates low-power behavior and direct GPIO interfacing to confirm compatibility with target baseband processors.

Use the DIO1568 EVB to accelerate prototyping, validate performance in your target system, and shorten the path from concept to final design.

Getting Started Preparation

• Step 1: Connect the board power
• Step 2: Place the SIM cards in the SIM card case
• Step 3: Switch between SIM cards by High and Low the select pin
• Step 4: Connect the board to your microcontroller with the FPC connector or the header pin(P2)

Downloads

• switch simcard DB schematic
• DIO1568 Datasheet