19-1977; Rev 3; 2/03
0.5
Ω
/0.8
Ω
Low-Voltage, Dual SPDT
Analog Switches in UCSP
MAX4684/MAX4685
General Description
The MAX4684/MAX4685 low on-resistance (R
ON
), low-
voltage, dual single-pole/double-throw (SPDT) analog
switches operate from a single +1.8V to +5.5V supply.
The MAX4684 features a 0.5Ω (max) R
ON
for its NC
switch and a 0.8Ω (max) R
ON
for its NO switch at a
+2.7V supply. The MAX4685 features a 0.8Ω max on-
resistance for both NO and NC switches at a +2.7V
supply.
Both parts feature break-before-make switching action
(2ns) with t
ON
= 50ns and t
OFF
= 40ns at +3V. The digi-
tal logic inputs are 1.8V logic-compatible with a +2.7V to
+3.3V supply.
The MAX4684/MAX4685 are packaged in the chipscale
package (UCSP)™, significantly reducing the required
PC board area. The chip occupies only a 2.0mm
✕
1.50mm area. The 4
✕
3 array of solder bumps are
spaced with a 0.5mm bump pitch.
Features
♦
12-Bump, 0.5mm-Pitch UCSP
♦
NC Switch R
ON
0.5Ω max (+2.7V Supply) (MAX4684)
0.8Ω max (+2.7V Supply) (MAX4685)
♦
NO Switch R
ON
0.8Ω max (+2.7V Supply)
♦
R
ON
Match Between Channels
0.06Ω (max)
♦
R
ON
Flatness Over Signal Range
0.15Ω (max)
♦
+1.8V to +5.5V Single-Supply Operation
♦
Rail-to-Rail
®
Signal Handling
♦
1.8V Logic Compatibility
♦
Low Crosstalk: -68dB (100kHz)
♦
High Off-Isolation: -64dB (100kHz)
♦
THD: 0.03%
♦
50nA (max) Supply Current
♦
Low Leakage Currents
1nA (max) at T
A
= +25°C
________________________Applications
Speaker Headset Switching
MP3 Players
Power Routing
Battery-Operated Equipment
Relay Replacement
Audio and Video Signal Routing
Communications Circuits
PCMCIA Cards
Cellular Phones
Modems
UCSP is a trademark of Maxim Integrated Products, Inc.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
MAX4685ETB
MAX4685EUB
PART
MAX4684EBC
MAX4684ETB
MAX4684EUB
MAX4685EBC
Ordering Information
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN/BUMP-
PACKAGE
12 UCSP*
10 Thin QFN
(3
✕
3)
10 µMAX
12 UCSP*
10 Thin QFN
(3
✕
3)
10 µMAX
TOP
MARK
AAF
AAG
—
AAG
AAH
—
Note:
Requires special solder temperature profile describing
the Absolute Maximum Ratings section.
*UCSP reliability is integrally linked to the user’s assembly
methods, circuit board material, and environment. Refer to the
UCSP Reliability Notice in the UCSP Reliability section of this
data sheet for more information.
Pin Configurations/Functional Diagrams/Truth Table
TOP VIEW
MAX4684/MAX4685
GND
NC1
IN1
COM1
NO1
C1
C2
C3
B1
A1
A2
A3
NC2
IN2
MAX4684/MAX4685
COM2
NO2
IN_
0
C4
B4
V+
UCSP
A4
1
NO_
OFF
ON
NC_
ON
OFF
IN1
4
NC1
5
µMAX
7
6
NC2
GND
V+
1
NO1
2
COM1
3
MAX4684/MAX4685
10
NO2
9
8
COM2
IN2
Continued at end of data sheet.
SWITCHES SHOWN FOR LOGIC "0" INPUT
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
