MAX4901 Datasheet, PDF (1/13 Pages) Maxim Integrated Products – Low-RON, Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability

19-3775; Rev 2; 5/06
Low-R_ON, Dual-SPST/Single-SPDT Clickless
Switches with Negative Rail Capability
General Description
The MAX4901–MAX4905 switches feature negative
signal capability that allows signals below ground to pass
through without distortion. The MAX4901/MAX4902 are a
dual SPST (single-pole/single-throw) and the MAX4903/
MAX4904/MAX4905 are a single SPDT (single-
pole/double-throw) configuration. These analog switches
operate from a single +1.8V to +5.5V supply and have
low 0.6Ω on-resistance, making them ideal for switching
audio signals.
The MAX4905 includes a comparator that can be used
for headphone detection or mute/send key function. The
MAX4902/MAX4904/MAX4905 have internal shunt resis-
tors to automatically discharge any capacitance at the
NO_ and NC connection points. This reduces click-and-
pop sounds that occur when switching audio signals
between pre-charged points. A break-before-make fea-
ture and auto-discharge also help to reduce popping.
These SPST and SPDT switches are available in
space-saving 8-pin TDFN and 9-bump UCSP™ pack-
ages and operate over the -40°C to +85°C extended
temperature range.
Applications
Cell Phones
Notebook Computers
PDAs and Handheld Devices MP3 Players
UCSP is a trademark of Maxim Integrated Products, Inc.
Features
♦ Distortion-Free Signal Throughput Down
to V_CC - 5.5V
♦ Comparator for Headphone or
Mute Detection (MAX4905)
♦ Clickless Switches with Internal Shunt Resistors
(MAX4902/MAX4904/MAX4905)
♦ 0.6Ω (typ) Low On-Resistance (R_ON)
♦ 0.25Ω On-Resistance Flatness
♦ +1.8V to +5.5V Supply Voltage
♦ 0.04% THD
Pin Configurations
TOP VIEW
BUMPS ON BOTTOM
MAX4901/MAX4902
1
2
3
MAX4903/MAX4904/MAX4905
1
2
3
A
COM1
NO1
IN1
B
V_CC
C
N.C.
GND
COM2
NO2
IN2
A
V_CC
NO
IN
B
COM N.C. (CMPO) GND
C
N.C.
NC N.C. (CMP-)
3 x 3 UCSP
3 x 3 UCSP
( ) MAX4905 ONLY
Pin Configurations continued at end of data sheet.
Ordering Information/Selector Guide
PART
PIN-PACKAGE
TOP MARK CONFIGURATION
MAX4901EBL-T 1.5mm x 1.5mm 9 UCSP-9
MAX4901ETA-T
8 TDFN-8
AEU
AOW
2 x SPST
2 x SPST
MAX4902EBL-T 1.5mm x 1.5mm 9 UCSP-9
MAX4902ETA-T
8 TDFN-8
AEV
AOX
2 x SPST
2 x SPST
MAX4903EBL-T 1.5mm x 1.5mm 9 UCSP-9
AEY
1 x SPDT
MAX4903ETA-T
8 TDFN-8
AOY
1 x SPDT
MAX4904EBL-T 1.5mm x 1.5mm 9 UCSP-9
AEW
1 x SPDT
MAX4904ETA-T
8 TDFN-8
AOZ
1 x SPDT
MAX4905EBL-T 1.5mm x 1.5mm 9 UCSP-9
AEX
1 x SPDT
MAX4905ETA-T
8 TDFN-8
APA
1 x SPDT
Note: All devices operate over the -40°C to +85°C operating temperature range.
COMPARATOR
No
No
No
No
No
No
No
No
Yes
Yes
SHUNT
No
No
Yes
Yes
No
No
Yes
Yes
Yes
Yes
PKG CODE
B9-1
T833-2
B9-1
T833-2
B9-1
T833-2
B9-1
T833-2
B9-1
T833-2
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