19-2632; Rev 0; 10/02
4.5
Ω
Dual SPST Analog Switches in UCSP
General Description
The MAX4721/MAX4722/MAX4723 low-voltage, low on-
resistance (R
ON
), dual 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 MAX4721/MAX4722/MAX4723 feature 4.5Ω R
ON
(max) with 1.2Ω flatness and 0.3Ω 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 t
ON
<80ns and t
OFF
<40ns at
+2.7V. The digital logic inputs are +1.8V logic compati-
ble 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 1.52mm
✕
1.52mm area
and has a 3
✕
3 bump array with a bump pitch of
0.5mm. These switches are also available in an 8-pin
µMAX package.
o
o
o
o
o
o
o
o
o
o
o
o
o
o
USB 1.1 Signal Switching
<2ns Differential Skew
-3dB Bandwidth: >300MHz
Low 15pF On-Channel Capacitance
Low R
ON
(max) Switches
4.5Ω (max) (+3V Supply)
3Ω (max) (+5V Supply)
0.3Ω (max) R
ON
Match (+3V Supply)
1.2Ω (max) R
ON
Flatness (+3V Supply)
<0.5nA Leakage Current at T
A
= +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
Features
MAX4721/MAX4722/MAX4723
Applications
Battery-Operated Equipment
Audio/Video-Signal Routing
Low-Voltage Data-Acquisition Systems
Sample-and-Hold Circuits
Communications Circuits
PART
MAX4721EUA
MAX4721EBL-T*
MAX4722EUA
MAX4722EBL-T*
MAX4723EUA
MAX4723EBL-T*
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
8 µMAX
9 UCSP-9
8 µMAX
9 UCSP-9
8 µMAX
9 UCSP-9
TOP
MARK
—
ABP
—
ABQ
—
ABR
Note:
UCSP package requires special solder temperature pro-
file described in the Absolute Maximum Ratings section.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
UCSP is a trademark of Maxim Integrated Products, Inc.
*UCSP
reliability is integrally linked to the user’s assembly meth-
ods, circuit board material, and environment. See the UCSP reli-
ability notice in the UCSP Reliability section of this data sheet for
more information.
Pin Configurations/Functional Diagrams/Truth Tables
MAX4721
TOP VIEW
(BUMP SIDE DOWN)
A
IN2
B
COM1
C
NO1
V+
IN1
COM2
C
NC1
V+
IN1
GND
NO2
B
COM1
COM2
C
NO1
V+
IN1
A
IN2
GND
NC2
B
COM1
COM2
A
IN2
GND
NC2
IN_
LOW
HIGH
NO_
OFF
ON
NC_
ON
OFF
1
2
3
1
MAX4722
2
3
1
MAX4723
2
3
UCSP
UCSP
UCSP
1
________________________________________________________________
Maxim Integrated Products
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.
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