參數(shù)資料
型號(hào): MAX3454EETE+T
廠(chǎng)商: Maxim Integrated Products
文件頁(yè)數(shù): 2/19頁(yè)
文件大?。?/td> 0K
描述: IC TXRX USB ESD-PROT 16TQFN
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 2,500
類(lèi)型: 收發(fā)器
規(guī)程: USB 2.0
電源電壓: 1.65 V ~ 3.6 V
安裝類(lèi)型: 表面貼裝
封裝/外殼: 16-WFQFN 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝: 16-TQFN-EP(3x3)
包裝: 帶卷 (TR)
MAX3453E–MAX3456E
±15kV ESD-Protected USB Transceivers
10
______________________________________________________________________________________
Detailed Description
The MAX3453E–MAX3456E USB-compliant transceivers
convert single-ended or differential logic-level signals to
USB signals, and USB signals to single-ended or differ-
ential logic-level signals. The MAX3453E fully complies
with full-speed (12Mbps) operation under USB specifica-
tion 2.0. The MAX3454E–MAX3456E fully comply with
USB specification 1.1, and full-speed (12Mbps) and low-
speed (1.5Mbps) operation under USB specification 2.0.
The MAX3453E–MAX3456E operate with VL as low as
+1.65V, ensuring compatibility with low-voltage ASICs.
The MAX3453E–MAX3456E derive power from the USB
host (VBUS) or from a single-cell Li+ battery
(MAX3454E/MAX3456E) connected to VBUS or from a
+3.3V regulated supply connected to VBUS and VTRM.
The MAX3453E–MAX3456E meet the physical layer
specifications for logic-level supply voltages (VL) from
+1.65V to +3.6V. Integrated ±15kV ESD protection safe-
guards the D+ and D- USB I/O ports.
The MAX3453E/MAX3454E feature an enumerate func-
tion providing an internal 1.5k
pullup resistor from D+
(MAX3453E/MAX3454E) or D- (MAX3454E only) to
VTRM. The enumerate function disconnects the 1.5k
pullup resistor, allowing the MAX3453E/MAX3454E to
simulate a bus disconnect while powered and connect-
ed to the USB cable. The MAX3453E/MAX3455E fea-
ture a bus-detect output (BD) that asserts high if VBUS
> +4V. BD asserts low if VBUS < +3.6V. The
MAX3455E/MAX3456E require external pullup resistors
from either D+ or D- to VTRM to utilize the appropriate
bus speed. The MAX3456E is pin-for-pin compatible
with the Micrel MIC2550A.
Applications Information
Power-Supply Configurations
Normal Operating Mode
Connect VL and VBUS to system power supplies (Table 1).
Connect VL to a +1.65V to +3.6V supply. Connect VBUS
to a +4.0V to +5.5V supply. Alternatively, the MAX3454E/
MAX3456E can derive power from a single Li+ battery.
Connect the battery to VBUS.
Additionally, the MAX3454E/MAX3456E can derive
power from a +3.3V ±10% voltage regulator. Connect
VBUS and VTRM to an external +3.3V voltage regulator.
VBUS no longer consumes current to power the internal
linear regulator in this configuration.
Table 1. Power-Supply Configurations
VBUS (V)
VTRM (V)
VL (V)
CONFIGURATION
NOTES
4.0 to 5.5
3.0 to 3.6 output
1.65 to 3.6
Normal mode
3.1 to 4.5
3.0 to 3.6 output
1.65 to 3.6
Battery supply
MAX3454E/MAX3456E
3.0 to 3.6
3.0 to 3.6 input
1.65 to 3.6
Voltage regulator supply
MAX3454E/MAX3456E
GND or floating
High-Z
1.65 to 3.6
Sharing mode
Table 2
3.0 to 5.5
High-Z
GND or floating
Disable mode
Table 2
*High impedance or low.
**High or low.
INPUTS/OUTPUTS
DISABLE MODE
SHARING MODE
VBUS/VTRM
+3.0V to +5.5V / High Impedance
Floating or connected to GND
(MAX3453E/MAX3454E/MAX3456E) / High Impedance
< 3.6V (MAX3453E/MAX3455E) / High Impedance
VL
Floating or connected to GND
1.65V to 3.6V input
D+ and D-
High impedance
High impedance for OE = low
VP and VM
Invalid*
High for OE = high
RCV
Invalid*
Undefined**
SPD (MAX3454E–MAX3456E),
SUS, OE, ENUM
(MAX3453E/MAX3454E)
High impedance
BD (MAX3453E/MAX3455E)
Invalid*
Low
Table 2. Disable-Mode and Sharing-Mode Connections
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