MAX4737 Maxim, MAX4737 Datasheet - Page 9

• Manufacturer Part Number: MAX4737
• Description: The MAX4737/MAX4738/MAX4739 low-voltage, low on-resistance (RON), quad single-pole/single throw (SPST) analog switches operate from a single +1
• Manufacturer: Maxim

The MAX4737/MAX4738/MAX4739 quad SPST analog
switches operate from a single +1.8V to +5.5V supply.
The MAX4737/MAX4738/MAX4739 offer excellent AC
characteristics, <0.5nA leakage current, less than 1ns
differential skew, and 15pF on-channel capacitance. All
of these devices are CMOS-logic compatible with V+ to
GND signal handling capability.
The MAX4737/MAX4738/MAX4739 are USB-complaint
switches that provide 4.5Ω (max) on-resistance and
15pF on-channel capacitance to maintain signal integri-
ty. At 12Mbps (USB full-speed data rate specification),
the MAX4737/MAX4738/MAX4739 introduce less than
2ns propagation delay between input and output sig-
nals and less than 0.5ns change in skew for the output
signals (see Figure 4).
The MAX4737 has four normally open (NO) switches, the
MAX4738 has four normally closed (NC) switches, and
the MAX4739 has two NO switches and two NC switches.
The MAX4737/MAX4738/MAX4739 logic inputs accept
up to +5.5V regardless of supply voltage. For example,
with a +3.3V supply, IN_ can be driven low to GND and
high to +5.5V allowing for mixing of logic levels in a
system. Driving the control logic inputs rail-to-rail mini-
mizes power consumption. For a +1.8V supply voltage,
the logic thresholds are 0.5V (low) and 1.4V (high); for
a +5V supply voltage, the logic thresholds are 0.8V
(low) and 2.0V (high).
UCSP
C4
D4
D3
C2
—
—
MAX4737
TSSOP
11
12
13
14
—
—
4.5 Ω Quad SPST Analog Switches in UCSP
Applications Information
_______________________________________________________________________________________
THIN
8, 16
QFN
11
12
13
14
—
Detailed Description
UCSP TSSOP
Digital Control Inputs
C4
D4
D3
C2
—
—
MAX4738
PIN
11
12
13
14
—
—
THIN
8, 16
QFN
11
12
13
14
—
UCSP TSSOP
C4
D4
D3
C2
—
—
MAX4739
11
12
13
14
—
—
Analog signals that range over the entire supply voltage
(V+ to GND) are passed with very little change in on-resis-
tance (see Typical Operating Characteristics). The switch-
es are bidirectional, so the NO_, NC_, and COM_ pins can
be either inputs or outputs.
Power-supply bypassing improves noise margin and
prevents switching noise from propagating from the V+
supply to other components. A 0.1µF capacitor connect-
ed from V+ to GND is adequate for most applications.
For the latest application details on UCSP construction,
dimensions, tape carrier information, PC board tech-
niques, bump-pad layout, and recommended reflow
temperature profile, as well as the latest information on
reliability testing results, refer to the Application Note:
UCSP—A Wafer-Level Chip-Scale Package on Maxim’s
web site at www.maxim-ic.com/ucsp.
8, 16
THIN
QFN
UCSP Applications Information
11
12
13
14
—
Pin Description (continued)
NAME
NO4
NC4
N.C.
IN4
IN1
V+
Analog-Switch Normally Open
Terminal
Analog-Switch Normally Closed
Terminal
Logic-Control Digital Input
Logic-Control Digital Input
Positive Analog Supply
No Connection. Not internally
connected.
Power-Supply Bypassing
Analog Signal Levels
FUNCTION
9