MAX3341E 查看數據表（PDF） - Maxim Integrated
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MAX3341E Datasheet PDF : 15 Pages
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±15kV ESD-Protected USB Level Translator in
UCSP with USB Detect
PIN
TSSOP UCSP
1
D2
2
D1
3
C2
4
C1
5
B1
6
B2
7
A1
8
A2
9
B3
10
A3
11
A4
12
B4
13
C4
14
D4
15
D3
16
C3
Pin Description
NAME
FUNCTION
RCV
VPO
MODE
VMO
OE
SUSP
VPI
VMI
ENUM
VCC
GND
D-
D+
VTRM
VL
USB_DET
Receiver Output. Single-ended CMOS output. RCV responds to the differential input on D+
and D-.
ASIC Voltage Positive Output. Logic-level data into the MAX3341E.
Mode-Control Input. Selects differential (mode 1) or single-ended (mode 0) input for the
system side when converting logic-level signals to USB level signals. Force MODE high to
select mode 1. Force MODE low to select mode 0.
ASIC Voltage Minus Output. Logic-level data into the MAX3341E.
Output Enable. Drive OE low to enable data transmission on D+ and D-. Drive OE high to
disable data transmission or to receive data.
Suspend Input. Drive SUSP low for normal operation. Drive SUSP high for low-power state. In
low-power state, RCV is low, and VPI/VMI are active.
ASIC Voltage Positive Input. Logic-level data output from the MAX3341E.
ASIC Voltage Minus Input. Logic-level data output from the MAX3341E.
Enumerate. Drive ENUM high to connect the internal 1.5kΩ resistor from D+ to 3.3V. Drive
ENUM low to disconnect the internal 1.5kΩ resistor.
USB-Side Power-Supply Input. Connect VCC to the incoming USB power supply. Bypass VCC
to GND with a 1µF ceramic capacitor.
Ground
Negative USB Differential Data Input/Output. Connect to the USB’s D- signal through a 23.7Ω
±1% resistor.
Positive USB Differential Data Input/Output. Connect to the USB’s D+ signal through a 23.7Ω
±1% resistor.
Regulated Output Voltage. 3.3V output derived from the VCC input. Bypass VTRM to GND
with a 1µF (min) low-ESR capacitor such as ceramic or plastic film types.
System-Side Power-Supply Input. Connect to the system’s logic-level power supply, 1.8V to
3.6V.
USB Detector Output. A high at USB_DET signals to the ASIC that VCC is present. A low at
USB_DET indicates that VCC is not present.
Detailed Description
The MAX3341E is a bidirectional level translator that
converts single-ended or differential logic-level signals
to differential USB signals, and converts differential
USB signals to single-ended or differential logic-level
signals. The MAX3341E includes an internal 1.5kΩ
pullup resistor that connects and disconnects D+ to
VTRM (Functional Diagram). The MAX3341E is tolerant
to power sequencing with either VCC > VL or VL > VCC.
Additionally, the USB I/O, D+ and D-, and VCC are ESD
protected to ±15kV. The MAX3341E can receive USB
power (VCC) directly from the USB connection, and
operates with logic supplies (VL) down to 1.8V while still
meeting the USB physical layer specifications. The
MAX3341E supports full-speed (12Mbps) USB specifi-
cation 2.0 operation.
The MAX3341E has a unique enumerate feature that
functions when power is applied. Driving ENUM low
disconnects the internal 1.5kΩ termination resistor from
D+ enumerating the USB. This is useful if changes in
communication protocol are required while power is
applied, and while the USB cable is connected.
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