4.5 Ohm Quad SPST Analog Switches in UCSP

The MAX4737/MAX4738/MAX4739 low-voltage, low on-resistance (RON), quad single-pole/single throw (SPST) analog switches operate from a single +1.8V to +5.5V supply. These devices are designed for USB 1.1 and audio switching applications.

The MAX4737/MAX4738/MAX4739 feature 4.5Ω RON (max) with 1.2Ω flatness and 0.4Ω matching between channels. These new switches feature guaranteed operation from +1.8V to +5.5V and are fully specified at 3V and 5V. These switches offer break-before-make switching (1ns) with tON <80ns and tOFF <40ns at +2.7V. The digital logic inputs are +1.8V logic compatible with a +2.7V to +3.6V supply.

These switches are packaged in a chip-scale package (UCSP™), significantly reducing the required PC board area. The chip occupies only a 2mm x 2mm area and has a 4 x 4 bump array with a bump pitch of 0.5mm. These switches are also available in a 14-pin TSSOP package.

Applications

* Audio/Video Signal Routing * Battery-Operated Equipment * Communications Circuits * Data Acquisition Systems * Low-Voltage Data-Acquisition Systems * Sample-and-Hold Circuits

* USB 1.1 Signal Switching

* 2ns (max) Differential Skew

* -3dB Bandwidth: >300MHz

* Low 20pF On-Channel Capacitance

* Low RON

* 4.5Ω (max) (+3V Supply)

* 3Ω (max) (+5V Supply)

* 0.4Ω (max) RON Match (+3V Supply)

* 1.2Ω (max) RON Flatness (+3V Supply)

* <0.5nA Leakage Current at +25°C

* High Off-Isolation: -55dB (10MHz)

* Low Crosstalk: -80dB (10MHz)

* Low Distortion: 0.03%

* +1.8V CMOS-Logic Compatible

* Single-Supply Operation from +1.8V to +5.5V

* Rail-to-Rail Signal Handling