19-3171; Rev 0; 2/04
±15kV ESD-Protected USB Transceivers
in UCSP with USB Detect
General Description
The MAX3344E/MAX3345E USB transceivers convert
logic-level signals to USB signals, and USB signals to
logic-level signals. An internal 1.5kΩ USB pullup resistor
supports full-speed (12Mbps) USB operation. The
MAX3344E/MAX3345E provide built-in ±15kV ESD-pro-
tection circuitry on the USB I/O pins, D+ and D-, and V
CC
.
The MAX3344E/MAX3345E operate with logic supply
voltages as low as 1.65V, ensuring compatibility with
low-voltage ASICs. The suspend mode lowers supply
current to less than 40µA. An enumerate function allows
devices to logically disconnect while plugged in. The
MAX3344E/MAX3345E are fully compliant with USB
specification 1.1, and full-speed operation under USB
specification 2.0.
The MAX3344E/MAX3345E have a USB detect that mon-
itors the USB bus for insertion and signals this event. The
MAX3344E USB_DET threshold is between 3.6V (min)
and 4V (max), while the MAX3345E USB_DET threshold
is between 1V (min) and 2.8V (max).
The MAX3344E/MAX3345E are available in the miniature
4
✕
4 UCSP™, as well as the small 16-pin TSSOP, and
are specified over the extended temperature range,
-40°C to +85°C.
♦
♦
♦
♦
♦
♦
Features
±15kV ESD Protection On D+ and D-
Comply with USB Specification 1.1 (Full Speed 2.0)
Separate VP and VM Inputs/Outputs
V
L
Down to 1.65V Allows Connection with Low-
Voltage ASICs
Enumerate Input—Allows USB Connection
through Software
USB Detect Function
3.6V (min) to 4V (max)—MAX3344E
1V (min) to 2.8V (max)—MAX3345E
Allow Single-Ended or Differential Logic I/O
Internal Linear Regulator Allows Direct Powering
from the USB
Internal Pullup Resistor for Full-Speed Operation
Three-State Outputs
No Power-Supply Sequencing Required
Driver Active in Suspend Mode
Available in Miniature Chip-Scale Package
MAX3344E/MAX3345E
♦
♦
♦
♦
♦
♦
♦
Ordering Information
PART
MAX3344EEUE
MAX3344EEBE-T
MAX3345EEUE
MAX3345EEBE-T
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
16 TSSOP
4 x 4 UCSP
16 TSSOP
4 x 4 UCSP
Applications
Cell Phones
PC Peripherals
Information Appliances
Data Cradles
PDAs
MP3 Players
Digital Cameras
Pin Configurations appear at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
Typical Operating Circuit
1µF
V
BUS
23.7Ω
23.7Ω
D-
VTRM
1µF
USB
INTERFACE
CONNECTOR
D+
D-
GND
SYSTEM
SUPPLY
VOLTAGE
0.1µF
SYSTEM INTERFACE
V
L
RCV
MAX3344E/
MAX3345E
VPI
VMI
SUSP
OE
USB_DET
MODE
ENUM
VPO
VMO
GND
V
CC
D+
________________________________________________________________
Maxim Integrated Products
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
in UCSP with USB Detect
MAX3344E/MAX3345E
ABSOLUTE MAXIMUM RATINGS
(All voltages refer to GND, unless otherwise noted.)
Supply Voltage (V
CC
) ...............................................-0.3V to +6V
Output of Internal Regulator (VTRM) ..........-0.3V to (V
CC
+ 0.3V)
Input Voltage (D+, D-) ..............................................-0.3V to +6V
System Supply Voltage (V
L
) .....................................-0.3V to +6V
RCV, SUSP, VMO, MODE, VPO,
OE,
VMI,
VPI, USB_DET, ENUM...............................-0.3V to (V
L
+ 0.3V)
Short-Circuit Current (D+, D-) to V
CC
or
GND (Note 1) .........................................................Continuous
Note 1:
External 23.7Ω resistors connected to D+ and D-.
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.
Maximum Continuous Current (all other pins) ..................±15mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin TSSOP (derate 9.4mW/°C above +70°C)...754mW (U16-2)
4
✕
4 UCSP (derate 8.2mW/°C above +70°C) ...659mW (B16-1)
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
Bump Temperature (soldering) Reflow............................+235°C
ELECTRICAL CHARACTERISTICS
(V
CC
= 4V to 5.5V bypassed with 1µF to GND, GND = 0, V
L
= 1.65V to 3.6V, ENUM = V
L
, T
A
= T
MIN
to T
MAX
, unless otherwise
noted. Typical values are at V
CC
= 5V, V
L
= 2.5V, T
A
= +25°C.) (Note 2)
PARAMETER
SUPPLY INPUTS (VCC, VTRM, VL)
Regulated Supply Voltage
Output
V
CC
Input Range
V
L
Input Range
Operating V
CC
Supply Current
Operating V
L
Supply Current
Full-Speed Idle and SE0 Supply
Current
Static V
L
Supply Current
Suspend Supply Current
Disable-Mode Supply Current
D+/D- Disable-Mode
Load Current
Sharing-Mode V
L
Supply
Current
D+/D- Sharing-Mode
Load Current
LOGIC-SIDE I/O
Input High Voltage
Input Low Voltage
Output-Voltage High
Output-Voltage Low
V
IH
V
IL
V
OH
V
OL
SUSP, MODE, ENUM,
OE,
VMO, VPO
SUSP, MODE, ENUM,
OE,
VMO, VPO
VPI, VMI, RCV, USB_DET; I
SOURCE
=
2mA
VPI, VMI, RCV, USB_DET; I
SINK
= -2mA
2/3 x V
L
0.4
V
L
- 0.4
0.4
V
V
V
V
V
VTRM
V
CC
V
L
I
VCC
I
VL
I
VCC(IDLE)
I
VL(STATIC)
I
VCC(SUSP)
I
VCC(DIS)
I
D_(DIS)
I
VL(SHARING)
I
D_(SHARING)
Full-speed transmitting/receiving at
12Mbps, C
L
= 50pF on D+ and D-
Full-speed transmitting/receiving at
12Mbps
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
SUSP =
OE
= high
V
L
= GND or open
V
L
= GND or open, V
D_
= 0 or +5.5V
V
CC
= GND or open,
OE
= low, SUSP =
high
V
CC
= GND or open, V
D_
= 0 or +5.5V
340
390
Internal regulator
3.0
4.0
1.65
3.3
3.6
5.5
3.60
10
8
450
500
12.5
40
20
5
20
20
V
V
V
mA
mA
µA
µA
µA
µA
µA
µA
µA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
2
_______________________________________________________________________________________
±15kV ESD-Protected USB Transceivers
in UCSP with USB Detect
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 4V to 5.5V bypassed with 1µF to GND, GND = 0, V
L
= 1.65V to 3.6V, ENUM = V
L
, T
A
= T
MIN
to T
MAX
, unless otherwise
noted. Typical values are at V
CC
= 5V, V
L
= 2.5V, T
A
= +25°C.) (Note 2)
PARAMETER
Input Leakage Current
USB-SIDE I/O
Output-Voltage Low
Output-Voltage High
Input Impedance
Single-Ended Input-Voltage High
Single-Ended Input-Voltage Low
Receiver Single-Ended
Hysteresis
Differential Input Sensitivity
Input Common-Mode Voltage
Range
Driver Output Impedance
Internal Pullup Resistor
V
OL
V
OH
Z
IN
V
IH
V
IL
V
HYS
V
DIFF
V
CM
R
OUT
R
PU
V
USBLH1
USB_DET Threshold
V
USBHL1
V
USBLH2
V
USBHL2
USB_DET Hysteresis
LINEAR REGULATOR
External Capacitor
ESD PROTECTION (V
CC
, D+, D-)
Human Body Model
IEC1000-4-2 Air-Gap Discharge
IEC1000-4-2 Contact Discharge
±15
±10
±8
kV
kV
kV
C
OUT
Compensation of linear regulator
1
µF
V
USBHYS
MAX3344E
MAX3344E
MAX3345E
MAX3345E
MAX3344E
1
25
mV
3.6
2.8
200
0.8
4.6
1.410
1.500
2.5
16.0
1.540
4.0
V
200
R
L
= 1.5kΩ from D+ or D- to 3.6V
R
L
= 15kΩ from D+ and D- to GND
Three-state driver, ENUM = 0, V
D_
= 0 or
+3.6V
2.8
1
2.0
0.8
0.3
3.6
V
V
MΩ
V
V
mV
mV
V
Ω
kΩ
SYMBOL
CONDITIONS
SUSP, MODE, ENUM,
OE,
VMO, VPO = 0 or
V
L
MIN
TYP
MAX
±1
UNITS
µA
MAX3344E/MAX3345E
TIMING CHARACTERISTICS
(V
CC
= 4V to 5.5V, GND = 0, V
L
= 1.65V to 3.6V, ENUM = V
L
, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
V
CC
= 5V, V
L
= 2.5V, T
A
= +25°C.) (Figures 2–6) (Note 2)
PARAMETER
TRANSMITTER
OE
to Transmit Delay Enable Time
OE
to Driver Three-State Delay
Driver Disable Time
VPO/VMO to D+/D- Propagation
Delay
VPO/VMO D+/D- Propagation
Delay
t
PZD
t
PDZ
t
PLH1(drv)
t
PHL1(drv)
t
PLH0(drv)
t
PHL0(drv)
Figures 2 and 6c
Figures 2 and 6c
MODE = high, Figures 4 and 6b
MODE = high, Figures 4 and 6b
MODE = low, Figures 3 and 6c
MODE = low, Figures 3 and 6c
10
10
11
11
20
20
18
18
20
20
ns
ns
ns
ns
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
_______________________________________________________________________________________
3
±15kV ESD-Protected USB Transceivers
in UCSP with USB Detect
MAX3344E/MAX3345E
TIMING CHARACTERISTICS (continued)
(V
CC
= 4V to 5.5V, GND = 0, V
L
= 1.65V to 3.6V, ENUM = V
L
, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
V
CC
= 5V, V
L
= 2.5V, T
A
= +25°C.) (Figures 2–6) (Note 2)
PARAMETER
Rise Time D+/D-
Fall Time D+/D-
Rise- and Fall-Time Matching
Output Signal Crossover
SYMBOL
t
R1
t
F1
t
R1
/t
F1
V
CRS
t
PLH(RCV)
CONDITIONS
C
L
= 50pF, 10% to 90% of
|V
OH
- V
OL
|
C
L
= 50pF, 90% to 10% of
|V
OH
- V
OL
|
(Note 3)
(Note 3)
MIN
4
4
90
1.3
TYP
MAX
20
20
111
2.0
18
18
18
18
UNITS
ns
ns
%
V
ns
ns
ns
ns
DIFFERENTIAL RECEIVER
(Figures 5 and 6a)
D+/D- to RCV Propagation Delay
t
PHL(RCV)
SINGLE-ENDED RECEIVERS
(Figures 5 and 6a)
t
PLH(SE)
D+/D- to VPI or VMI Propagation
Delay
t
PHL(SE)
Note 2:
Parameters are 100% production tested at 25°C, limits over temperature are guaranteed by design.
Note 3:
Guaranteed by design, not production tested.
Typical Operating Characteristics
(V
CC
= 5V, V
L
= 3.3V, T
A
= +25°C, unless otherwise noted.)
DIFFERENTIAL RECEIVER PROPAGATION
DELAY vs. V
L
MAX3344E/45E toc01
DIFFERENTIAL RECEIVER PROPAGATION
DELAY vs. V
CC
MAX3344E/45E toc02
SINGLE-ENDED RECEIVER PROPAGATION
DELAY vs. V
L
14
PROPAGATION DELAY (ns)
13
12
11
10
9
8
T
A
= -40°C
1.5
1.8
2.1
2.4
2.7
3.0
3.3
3.6
T
A
= +25°C
T
A
= +85°C
MAX3344E/45E toc03
20
T
A
= +85°C
PROPAGATION DELAY (ns)
18
20
T
A
= +85°C
15
PROPAGATION DELAY (ns)
18
16
T
A
= +25°C
14
T
A
= -40°C
12
16
T
A
= +25°C
14
12
T
A
= -40°C
10
1.5
1.8
2.1
2.4
2.7
3.0
3.3
3.6
V
L
(V)
10
4.00
4.25
4.50
4.75
V
CC
(V)
5.00
5.25
5.50
7
V
L
(V)
4
_______________________________________________________________________________________
±15kV ESD-Protected USB Transceivers
in UCSP with USB Detect
MAX3344E/MAX3345E
Typical Operating Characteristics (continued)
(V
CC
= 5V, V
L
= 3.3V, T
A
= +25°C, unless otherwise noted.)
SINGLE-ENDED RECEIVER PROPAGATION
DELAY vs. V
CC
MAX3344E/45E toc04
TRANSMITTER SKEW vs. V
CC
1.8
TRANSMITTER SKEW (ns)
1.6
1.4
1.2
1.0
0.8
0.6
0.4
T
A
= +25°C
T
A
= +85°C
4
3
4.00
4.25
4.50
4.75
V
CC
(V)
5.00
5.25
5.50
1.5
T
A
= -40°C
MAX3344E/45E toc05
LOGIC CURRENT CONSUMPTION IN
SUSPEND MODE
MAX3344E/45E toc06
15
14
PROPAGATION DELAY (ns)
13
12
11
T
A
= +25°C
10
9
8
7
4.00
4.25
4.50
4.75
V
CC
(V)
5.00
5.25
T
A
= -40°C
T
A
= +85°C
2.0
10
9
8
I
VL
(µA)
7
6
5
5.50
1.8
2.1
2.4
2.7
3.0
3.3
3.6
V
L
(V)
V
CC
CURRENT CONSUMPTION IN
SUSPEND MODE
MAX3344E/45E toc07
VTRM vs. V
CC
MAX3344E/45E toc08
RISE- AND FALL-TIME MATCHING
MAX3344E/45E toc09
32
31
30
29
I
VCC
(µA)
28
27
26
25
24
23
22
4.00
4.25
4.50
4.75
V
CC
(V)
5.00
5.25
3.5
f = 6MHz
3.4
D+
1V/div
D-
VTRM (V)
3.3
3.2
3.1
I
VTRM
= 15mA
3.0
5.50
4.00
4.25
4.50
4.75
V
CC
(V)
5.00
5.25
5.50
20ns/div
SUSPEND RESPONSE
MAX3344E/45E toc10
TRANSMISSION IN SUSPEND MODE
(SUSP = 1)
MAX3344E/45E toc11
USB_DET RESPONSE
MAX3344E/45E toc12
VPO
SUSP
0
VMO
2V/div
2V/div
RCV
0
D+
D-
V
CC
2V/div
0
USB_DET
0
100ns/div
2µs/div
10µs/div
_______________________________________________________________________________________
5
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