19-2843; Rev 1; 11/03
±15kV ESD-Protected USB Transceivers
General Description
The MAX3450E/MAX3451E/MAX3452E USB-compliant
transceivers interface low-voltage ASICs with USB
devices. The devices fully comply with USB 1.1 and
USB 2.0 when operating at full (12Mbps) and low
(1.5Mbps) speeds. The MAX3450E/MAX3451E/
MAX3452E operate with V
L
as low as +1.65V, ensuring
compatibility with low-voltage ASICs.
The MAX3450E/MAX3451E/MAX3452E feature a logic-
selectable suspend mode that reduces current con-
sumption to less than 40µA. Integrated
±15kV
ESD
protection protects the USB D+ and D- bidirectional
bus connections. The MAX3450E is pin compatible with
Micrel’s MIC2550A. The MAX3451E features an internal
1.5kΩ USB pullup resistor and an enumeration function
that allows devices to logically disconnect while
plugged in. The MAX3452E provides a push-pull bus-
detect (BD) output that asserts high when V
BUS
is
greater than +4.0V.
The MAX3450E/MAX3451E/MAX3452E operate over the
-40°C to +85°C extended temperature range and are
available in 14-pin TSSOP and 3mm x 3mm 16-pin thin
QFN packages.
o
±15kV
ESD Protection on D+ and D-
o
Combined VP and VM Inputs/Outputs
o
+1.65V to +3.6V V
L
Logic Supply Input for
Interfacing with Low-Voltage ASICs
o
Enumerate Input Function (MAX3451E)
o
Powered from Li+ Battery as Low as +3.1V
(MAX3450E and MAX3451E)
o
V
BUS
Detection (MAX3452E)
o
Pin Compatible with Micrel MIC2550A (MAX3450E)
o
Internal D+ or D- Pullup Resistor (MAX3451E)
o
No Power-Supply Sequencing Required
Features
MAX3450E/MAX3451E/MAX3452E
Ordering Information
PART
MAX3450EEUD
MAX3450EETE
MAX3451EEUD
MAX3451EETE
MAX3452EEUD
MAX3452EETE
TEMP RANGE
-40
o
C to +85
o
C
-40 C to +85 C
-40 C to +85 C
-40
o
C to +85
o
C
-40 C to +85 C
-40 C to +85 C
o
o
o
o
o
o
o
o
Applications
PDAs
PC Peripherals
Cellular Telephones
Data Cradles
MP3 Players
Typical Operating Circuit appears at end of data sheet.
PIN-PACKAGE
14 TSSOP
16 Thin QFN
14 TSSOP
16 Thin QFN
14 TSSOP
16 Thin QFN
Pin Configurations
V
BUS
14
N.C.
TOP VIEW
V
L
1
SPD
2
RCV
3
VP 4
VM
5
N.C.
6
GND
7
14
V
BUS
13
N.C. *(ENUM) **(BD)
12
V
TRM
RCV
2
3
SPD
1
16
15
13
MAX3450E
MAX3451E
MAX3452E
11
D+
10
D-
9
OE
8
SUS
VP
VM
MAX3450E
MAX3451E
MAX3452E
***EXPOSED PADDLE
N.C.
*(ENUM)
**(BD)
12
V
TRM
11
D+
10
D-
9
OE
8
N.C.
4
5
N.C.
6
GND
7
SUS
TSSOP
*MAX3451E ONLY
**MAX3452E ONLY
***CONNECT EXPOSED PADDLE TO GND OR LEAVE FLOATING
3mm x 3mm
THIN QFN
________________________________________________________________
Maxim Integrated Products
V
L
1
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.
±15kV ESD-Protected USB Transceivers
MAX3450E/MAX3451E/MAX3452E
ABSOLUTE MAXIMUM RATINGS
V
BUS
, V
L
, D+, D- to GND.......................................-0.3V to +6.0V
V
TRM
to GND ............................................-0.3V to (V
BUS
+ 0.3V)
VP, VM, SUS, SPD, ENUM,
RCV,
OE,
BD to GND ................................-0.3V to (V
L
+ 0.3V)
Current (into any pin) ........................................................±15mA
Short-Circuit Current (D+ and D-)...................................±150mA
Continuous Power Dissipation (T
A
= +70°C)
14-Pin TSSOP
(derate 9.1mW/°C above +70°C) .................................727mW
16-Pin Thin QFN 3mm x 3mm
(derate 14.7mW/°C above +70°C) .............................1176mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(V
BUS
= +4.0V to +5.5V or V
TRM
= +3.0V to +3.6V, V
L
= +1.65V to +3.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values
are at V
BUS
= +5.0V, V
L
= +2.5V, and T
A
= +25°C.) (Note 1)
PARAMETER
Regulated Supply Voltage
Output
Operating Supply Current
Operating V
L
Supply Current
Full-Speed Idle and SE0 Supply
Current
Static V
L
Supply Current
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
SUPPLY INPUTS (V
BUS
, V
TRM
, V
L
)
V
TRM
I
VBUS
I
VL
I
VBUS(IDLE)
Internal regulator
Full-speed transmitting/receiving at 12Mbps,
C
L
= 50pF on D+ and D- (Note 2)
Full-speed transmitting/receiving at 12Mbps
(Note 2)
Full-speed idle: V
D+
> 2.7V, V
D-
< 0.3V
SE0: V
D+
< 0.3V, V
D-
< 0.3V
Full-speed idle,
SE0, or suspend
mode
MAX3450E,
MAX3451E
MAX3452E
MAX3450E,
MAX3451E
(ENUM = low)
MAX3452E
Disable-Mode Supply Current
Sharing-Mode V
L
Supply
Current
I
VBUS(DIS)
V
L
= GND or open
MAX3450E,
MAX3451E
MAX3452E
250
250
3.0
3.3
3.6
10
2.5
350
350
5
15
35
40
20
5
µA
20
20
5
µA
µA
µA
V
mA
mA
µA
I
VL(STATIC)
µA
Suspend Supply Current
I
VBUS(SUSP)
VM = VP = open,
SUS =
OE
= high
µA
V
BUS
= GND or open,
OE
= low, VP = low or
I
VL(SHARING)
high, VM = low or
high, SUS = high
D+/D- Sharing-Mode
Load Current
D+/D- Disable-Mode
Load Current
I
D_(SHARING)
V
BUS
= GND or open, V
D_
= 0 or +5.5V
I
D_(DIS)
V
L
= GND or open, V
D_
= 0 or +5.5V
2
_______________________________________________________________________________________
±15kV ESD-Protected USB Transceivers
DC ELECTRICAL CHARACTERISTICS (continued)
(V
BUS
= +4.0V to +5.5V or V
TRM
= +3.0V to +3.6V, V
L
= +1.65V to +3.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values
are at V
BUS
= +5.0V, V
L
= +2.5V, and T
A
= +25°C.) (Note 1)
PARAMETER
USB Power-Supply Detection
Threshold
SYMBOL
CONDITIONS
MAX3450E/MAX3451E, supply lost
V
TH_VBUS
MAX3450E/MAX3451E, supply present (Note 3)
MAX3452E, supply lost
MAX3452E, supply present
USB Power-Supply Detection
Hysteresis
V
L
Power-Supply Detection
Threshold
Input Voltage Low
Input Voltage High
Output Voltage Low
Output Voltage High
Input Leakage Current
Input Capacitance
ANALOG INPUTS/OUTPUTS (D+, D-)
Differential Input Sensitivity
Differential Common-Mode
Voltage
Single-Ended Input Low Voltage
Single-Ended Input High Voltage
Hysteresis
Output Voltage Low
Output Voltage High
Off-State Leakage Current
Transceiver Capacitance
Driver Output Impedance
Input Impedance
Internal Pullup Resistance
ESD PROTECTION (D+, D-)
Human Body Model
IEC 1000-4-2 Contact Discharge
±15
±8
kV
kV
V
ID
V
CM
V
ILSE
V
IHSE
V
HYST
V
OLD
V
OHD
I
LZ
C
IND
Z
DRV
Z
IN
R
PULLUP
Measured from D_ to GND
Steady-state drive
Driver off
I
LOAD
= 500µA (MAX3451E) (Note 4)
4.0
10
1.425
1.575
R
L
= 1.5kΩ to +3.6V
R
L
= 15kΩ to GND
2.8
-1
20
15.5
2.0
250
0.3
3.6
+1
|V
D+
- V
D-
|
Includes V
ID
range
0.2
0.8
2.5
0.8
V
V
V
V
mV
V
V
µA
pF
Ω
MΩ
kΩ
V
HYST_VBUS
V
TH_VL
MAX3450E/MAX3451E
MAX3452E
4.0
75
40
0.85
mV
V
3.6
3.6
MIN
TYP
MAX
0.8
V
UNITS
MAX3450E/MAX3451E/MAX3452E
DIGITAL INPUTS/OUTPUTS (VP, VM, RCV, SUS,
OE,
SPD, BD, ENUM)
V
IL
V
IH
V
OL
V
OH
I
LKG
C
IN
Measured from input to GND
VM, VP, SUS, SPD, ENUM,
OE
VM, VP, SUS, SPD, ENUM,
OE
VM, VP, RCV, BD, I
OL
= +2mA
VM, VP, RCV, BD, I
OH
= -2mA
V
L
- 0.4
-1
10
+1
0.7 x V
L
0.4
0.3 x V
L
V
V
V
V
µA
pF
_______________________________________________________________________________________
3
±15kV ESD-Protected USB Transceivers
MAX3450E/MAX3451E/MAX3452E
TIMING CHARACTERISTICS
(V
BUS
= +4.0V to +5.5V or V
TRM
= +3.0V to +3.6V, V
L
= +1.65V to +3.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values
are at V
BUS
= +5V, V
L
= +2.5V, and T
A
= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DRIVER CHARACTERISTICS (FULL-SPEED MODE, C
L
= 50pF)
Rise Time
Fall Time
Rise-/Fall-Time Matching
(Note 2)
Output-Signal Crossover
Voltage (Note 2)
Driver Propagation Delay
(Figures 2, 6)
Driver Disable Delay
(Figure 3)
Driver Enable Delay
(Figure 3)
Rise Time
Fall Time
Rise-/Fall-Time Matching
Output-Signal Crossover
Voltage
t
FR
t
FF
t
FR
/t
FF
V
CRS_F
t
PLH_DRV
t
PHL_DRV
t
PHZ_DRV
t
PLZ_DRV
t
PZH_DRV
t
PZL_DRV
t
LR
t
LF
t
LR
/t
LF
V
CRS_L
10% to 90% of |V
OHD
- V
OLD
|, Figures 1, 6
90% to 10% of |V
OHD
- V
OLD
|, Figures 1, 6
Excluding the first transition from idle state,
(Figures 1, 6)
Excluding the first transition from idle state,
(Figures 2, 6)
Low-to-high transition
High-to-low transition
High-to-off transition
Low-to-off transition
Off-to-high transition
Off-to-low transition
10% to 90% of |V
OHD
- V
OLD
|, Figures 1, 6
90% to 10% of |V
OHD
- V
OLD
|, Figures 1, 6
Excluding the first transition from idle state,
Figures 1, 6
Excluding the first transition from idle state,
Figures 2, 6
Low-to-high transition
High-to-low transition
Low-to-high transition
High-to-low transition
High-to-off transition
Low-to-off transition
Off-to-high transition
Off-to-low transition
75
75
80
1.3
4
4
90
1.3
20
20
110
2.0
18
18
20
20
20
20
300
300
125
2.0
ns
ns
%
V
ns
ns
ns
DRIVER CHARACTERISTICS (LOW-SPEED MODE, C
L
= 200pF TO 600pF)
ns
ns
%
V
RECEIVER CHARACTERISTICS (C
L
= 15pF)
Differential Receiver Propagation
Delay, Figures 4, 6
Single-Ended Receiver
Propagation Delay, Figures 4, 6
Single-Ended Receiver Disable
Delay, Figure 5
Single-Ended Receiver Enable
Delay, Figure 5
t
PLH_RCV
t
PHL_RCV
t
PLH_SE
t
PHL_SE
t
PHZ_SE
t
PLZ_SE
t
PZH_SE
t
PZL_SE
22
22
12
12
15
15
15
15
ns
ns
ns
ns
Note 1:
Parameters are 100% production tested at +25°C, unless otherwise noted. Limits over temperature are guaranteed by
design.
Note 2:
Guaranteed by design, not production tested.
Note 3:
Production tested to +2.7V for V
L
≤
+3.0V.
Note 4:
Including external 24.3Ω series resistor.
4
_______________________________________________________________________________________
±15kV ESD-Protected USB Transceivers
Typical Operating Characteristics
(V
BUS
= +5.0V, V
L
= +3.3V, T
A
= +25°C, unless otherwise noted.)
MAX3450E/MAX3451E/MAX3452E
SINGLE-ENDED RECEIVER
PROPAGATION DELAY vs. V
L
MAX3450-52E toc01
RISE-/FALL-TIME MATCHING
(FULL SPEED)
MAX3450-52E toc02
RISE-/FALL-TIME MATCHING
(LOW SPEED)
MAX3450-52E toc03
8
C
L
= 15pF
7
PROPAGATION DELAY (ns)
6
5
4
3
2
1
0
T
A
= -40°C
T
A
= +25°C
T
A
= +85°C
C
L
= 50pF
C
L
= 400pF
D+/D-
1V/div
D+/D-
1V/div
20ns/div
100ns/div
1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6
V
L
(V)
OE, VP, AND VM TIMING
MAX3450-52E toc04
SUPPLY CURRENT
vs. D+/D- CAPACITANCE
24
22
20
18
16
14
12
10
8
6
4
2
0
0
50
100 150 200 250 300 350 400
D+/D- CAPACITANCE (pF)
MAX3450-52E toc05
LOGIC SUPPLY CURRENT
vs. D+/D- CAPACITANCE
450
LOGIC SUPPLY CURRENT (µA)
400
350
300
250
200
150
100
50
0
0
50
100 150 200 250 300 350 400
D+/D- CAPACITANCE (pF)
SPD = GND, f
IN
= 750kHz
SPD = V
L
, f
IN
= 6MHz
MAX3450-52E toc06
500
C
L
= 15pF
VP
2V/div
VM
2V/div
SUPPLY CURRENT (mA)
SPD = V
L
, f
IN
= 6MHz
SPD = GND, f
IN
= 750kHz
OE
5V/div
20ns/div
_______________________________________________________________________________________
5
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
