General Description
The MAX4684/MAX4685 low on-resistance (R
ON
), low-
voltage, dual single-pole/double-throw (SPDT) analog
switches operate from a 1.8V to +5.5V supply.
The MAX4684 features a 0.5
Ω
(max) R
ON
for its NC
switch and a 0.8
Ω
(max) R
ON
for its NO switch at a
+2.7V supply. The MAX4685 features a 0.8
Ω
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.
________________________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
Features
♦
12-Bump, 0.5mm-Pitch UCSP
♦
NC Switch R
ON
0.5
Ω
max (+2.7V Supply) (MAX4684)
0.8
Ω
max (+2.7V Supply) (MAX4685)
♦
NO Switch R
ON
0.8
Ω
max (+2.7V Supply)
♦
R
ON
Match Between Channels
0.06
Ω
(max)
♦
R
ON
Flatness Over Signal Range
0.15
Ω
(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
MAX4684/MAX4685
0.5
Ω
/0.8
Ω
Low-Voltage, Dual SPDT
Analog Switches in UCSP
________________________________________________________________ Maxim Integrated Products
1
19-1977; Rev 3; 2/03
COM2
COM1
NO2
NO1
NC2
IN2
IN1
NC1
GND
V+
TOP VIEW
IN_
0
1
NO_
MAX4684/MAX4685
OFF
ON
NC_
ON
SWITCHES SHOWN FOR LOGIC "0" INPUT
OFF
UCSP
MAX4684/MAX4685
MAX4684/MAX4685
NC2
IN1
GND
NC1
2
3
9
8
COM2
IN2
COM1
NO1
1
10
NO2
V+
4
5
7
6
µMAX
C1
C2
C3
C4
B4
A4
A3
A2
A1
B1
Pin Configurations/Functional Diagrams/Truth Table
UCSP is a trademark of Maxim Integrated Products, Inc.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
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.
Continued at end of data sheet.
*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.
Note:
Requires special solder temperature profile describing
the Absolute Maximum Ratings section.
Ordering Information
PART
TEMP RANGE
PIN/BUMP-
PACKAGE
TOP
MARK
MAX4684
EBC
-40
°
C to +85
°
C
12 UCSP*
AAF
MAX4684ETB
-40
°
C to +85
°
C
10 Thi n Q FN
( 3
✕
3)
AAG
MAX4684EUB
-40
°
C to +85
°
C
10 µMAX
—
MAX4685
EBC
-40
°
C to +85
°
C
12 UCSP*
AAG
MAX4685ETB
-40
°
C to +85
°
C
10 Thi n Q FN
( 3
✕
3)
AAH
MAX4685EUB
-40
°
C to +85
°
C
10 µMAX
—
