Maxim MAX3344EEBE-T -5kv esd-protected usb transceivers in ucsp with usb detect Datasheet

19-3171; Rev 0; 2/04
±15kV ESD-Protected USB Transceivers
in UCSP with USB Detect
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-protection circuitry on the USB I/O pins, D+ and D-, and VCC.
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 monitors 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 DComply with USB Specification 1.1 (Full Speed 2.0)
Separate VP and VM Inputs/Outputs
VL Down to 1.65V Allows Connection with LowVoltage 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
Ordering Information
Applications
Cell Phones
PC Peripherals
Information Appliances
Data Cradles
PDAs
MP3 Players
Digital Cameras
PART
TEMP RANGE
PIN-PACKAGE
MAX3344EEUE
-40°C to +85°C
16 TSSOP
MAX3344EEBE-T
-40°C to +85°C
4 x 4 UCSP
MAX3345EEUE
-40°C to +85°C
16 TSSOP
MAX3345EEBE-T
-40°C to +85°C
4 x 4 UCSP
Pin Configurations appear at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
Typical Operating Circuit
1µF
SYSTEM
SUPPLY
VOLTAGE
0.1µF
SYSTEM INTERFACE
VL
RCV
MAX3344E/
MAX3345E
VPI
VMI
SUSP
OE
USB_DET
MODE
ENUM
VPO
VMO
GND
VCC
VBUS
23.7Ω
D+
23.7Ω
D-
D+
DGND
VTRM
1µF
USB
INTERFACE
CONNECTOR
________________________________________________________________ Maxim Integrated Products
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.
1
MAX3344E/MAX3345E
General Description
MAX3344E/MAX3345E
±15kV ESD-Protected USB Transceivers
in UCSP with USB Detect
ABSOLUTE MAXIMUM RATINGS
Maximum Continuous Current (all other pins) ..................±15mA
Continuous Power Dissipation (TA = +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
(All voltages refer to GND, unless otherwise noted.)
Supply Voltage (VCC) ...............................................-0.3V to +6V
Output of Internal Regulator (VTRM) ..........-0.3V to (VCC + 0.3V)
Input Voltage (D+, D-) ..............................................-0.3V to +6V
System Supply Voltage (VL) .....................................-0.3V to +6V
RCV, SUSP, VMO, MODE, VPO, OE, VMI,
VPI, USB_DET, ENUM...............................-0.3V to (VL + 0.3V)
Short-Circuit Current (D+, D-) to VCC 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.
ELECTRICAL CHARACTERISTICS
(VCC = 4V to 5.5V bypassed with 1µF to GND, GND = 0, VL = 1.65V to 3.6V, ENUM = VL, TA = TMIN to TMAX, unless otherwise
noted. Typical values are at VCC = 5V, VL = 2.5V, TA = +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
3.0
3.3
3.6
V
SUPPLY INPUTS (VCC, VTRM, VL)
Regulated Supply Voltage
Output
VCC Input Range
VL Input Range
Operating VCC Supply Current
Operating VL Supply Current
VVTRM
Internal regulator
VCC
4.0
5.5
V
VL
1.65
3.60
V
IVCC
Full-speed transmitting/receiving at
12Mbps, CL = 50pF on D+ and D-
10
mA
IVL
Full-speed transmitting/receiving at
12Mbps
8
mA
Full-speed idle: VD+ > 2.7V, VD- < 0.3V
340
450
SE0: VD+ < 0.3V, VD- < 0.3V
390
500
Full-Speed Idle and SE0 Supply
Current
IVCC(IDLE)
Static VL Supply Current
IVL(STATIC)
Full-speed idle, SE0, or suspend mode
Suspend Supply Current
IVCC(SUSP)
IVCC(DIS)
Disable-Mode Supply Current
D+/D- Disable-Mode
Load Current
ID_(DIS)
µA
12.5
µA
SUSP = OE = high
40
µA
VL = GND or open
20
µA
VL = GND or open, VD_ = 0 or +5.5V
5
µA
Sharing-Mode VL Supply
Current
IVL(SHARING)
VCC = GND or open, OE = low, SUSP =
high
20
µA
D+/D- Sharing-Mode
Load Current
ID_(SHARING)
VCC = GND or open, VD_ = 0 or +5.5V
20
µA
Input High Voltage
VIH
SUSP, MODE, ENUM, OE, VMO, VPO
Input Low Voltage
VIL
SUSP, MODE, ENUM, OE, VMO, VPO
VPI, VMI, RCV, USB_DET; ISOURCE =
2mA
VPI, VMI, RCV, USB_DET; ISINK = -2mA
LOGIC-SIDE I/O
2
Output-Voltage High
VOH
Output-Voltage Low
VOL
2/3 x VL
V
0.4
VL - 0.4
_______________________________________________________________________________________
V
V
0.4
V
±15kV ESD-Protected USB Transceivers
in UCSP with USB Detect
(VCC = 4V to 5.5V bypassed with 1µF to GND, GND = 0, VL = 1.65V to 3.6V, ENUM = VL, TA = TMIN to TMAX, unless otherwise
noted. Typical values are at VCC = 5V, VL = 2.5V, TA = +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
SUSP, MODE, ENUM, OE, VMO, VPO = 0 or
VL
Input Leakage Current
MAX
UNITS
±1
µA
0.3
V
3.6
V
USB-SIDE I/O
Output-Voltage Low
VOL
RL = 1.5kΩ from D+ or D- to 3.6V
Output-Voltage High
VOH
RL = 15kΩ from D+ and D- to GND
Input Impedance
ZIN
Three-state driver, ENUM = 0, VD_ = 0 or
+3.6V
Single-Ended Input-Voltage High
VIH
Single-Ended Input-Voltage Low
VIL
2.8
1
MΩ
2.0
V
0.8
V
Receiver Single-Ended
Hysteresis
VHYS
Differential Input Sensitivity
VDIFF
200
Input Common-Mode Voltage
Range
VCM
0.8
2.5
V
Driver Output Impedance
ROUT
4.6
16.0
Ω
1.540
kΩ
Internal Pullup Resistor
USB_DET Threshold
USB_DET Hysteresis
200
RPU
1.410
VUSBLH1
MAX3344E
VUSBHL1
MAX3344E
VUSBLH2
MAX3345E
VUSBHL2
MAX3345E
VUSBHYS
MAX3344E
mV
mV
1.500
4.0
3.6
2.8
V
1
25
mV
LINEAR REGULATOR
External Capacitor
COUT
Compensation of linear regulator
1
µF
ESD PROTECTION (VCC, D+, D-)
Human Body Model
±15
IEC1000-4-2 Air-Gap Discharge
±10
kV
IEC1000-4-2 Contact Discharge
±8
kV
kV
TIMING CHARACTERISTICS
(VCC = 4V to 5.5V, GND = 0, VL = 1.65V to 3.6V, ENUM = VL, TA = TMIN to TMAX, unless otherwise noted. Typical values are at
VCC = 5V, VL = 2.5V, TA = +25°C.) (Figures 2–6) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
TRANSMITTER
OE to Transmit Delay Enable Time
tPZD
Figures 2 and 6c
20
ns
OE to Driver Three-State Delay
Driver Disable Time
tPDZ
Figures 2 and 6c
20
ns
VPO/VMO to D+/D- Propagation
Delay
tPLH1(drv)
MODE = high, Figures 4 and 6b
10
18
tPHL1(drv)
MODE = high, Figures 4 and 6b
10
18
VPO/VMO D+/D- Propagation
Delay
tPLH0(drv)
MODE = low, Figures 3 and 6c
11
20
tPHL0(drv)
MODE = low, Figures 3 and 6c
11
20
ns
ns
_______________________________________________________________________________________
3
MAX3344E/MAX3345E
ELECTRICAL CHARACTERISTICS (continued)
TIMING CHARACTERISTICS (continued)
(VCC = 4V to 5.5V, GND = 0, VL = 1.65V to 3.6V, ENUM = VL, TA = TMIN to TMAX, unless otherwise noted. Typical values are at
VCC = 5V, VL = 2.5V, TA = +25°C.) (Figures 2–6) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Rise Time D+/D-
tR1
CL = 50pF, 10% to 90% of
|VOH - VOL|
4
20
ns
Fall Time D+/D-
tF1
CL = 50pF, 90% to 10% of
|VOH - VOL|
4
20
ns
Rise- and Fall-Time Matching
tR1/tF1
(Note 3)
90
111
%
Output Signal Crossover
VCRS
(Note 3)
1.3
2.0
V
tPLH(RCV)
18
ns
tPHL(RCV)
SINGLE-ENDED RECEIVERS (Figures 5 and 6a)
tPLH(SE)
D+/D- to VPI or VMI Propagation
Delay
tPHL(SE)
18
ns
18
ns
18
ns
DIFFERENTIAL RECEIVER (Figures 5 and 6a)
D+/D- to RCV Propagation Delay
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
(VCC = 5V, VL = 3.3V, TA = +25°C, unless otherwise noted.)
TA = +25°C
14
TA = -40°C
16
TA = +25°C
14
12
12
10
10
TA = -40°C
14
13
TA = +85°C
12
11
TA = +25°C
10
9
8
1.5
1.8
2.1
2.4
2.7
VL (V)
4
3.0
3.3
3.6
MAX3344E/45E toc03
TA = +85°C
18
15
PROPAGATION DELAY (ns)
16
MAX3344E/45E toc02
TA = +85°C
18
20
PROPAGATION DELAY (ns)
MAX3344E/45E toc01
20
SINGLE-ENDED RECEIVER PROPAGATION
DELAY vs. VL
DIFFERENTIAL RECEIVER PROPAGATION
DELAY vs. VCC
DIFFERENTIAL RECEIVER PROPAGATION
DELAY vs. VL
PROPAGATION DELAY (ns)
MAX3344E/MAX3345E
±15kV ESD-Protected USB Transceivers
in UCSP with USB Detect
TA = -40°C
7
4.00
4.25
4.50
4.75
VCC (V)
5.00
5.25
5.50
1.5
1.8
2.1
2.4
2.7
VL (V)
_______________________________________________________________________________________
3.0
3.3
3.6
±15kV ESD-Protected USB Transceivers
in UCSP with USB Detect
SINGLE-ENDED RECEIVER PROPAGATION
DELAY vs. VCC
11
TA = +25°C
10
9
8
TA = -40°C
1.6
1.4
1.2
1.0
TA = +25°C
7
4.25
4.50
4.75
5.00
5.25
5.50
4.25
4.50
28
27
26
5.00
5.25
1.5
5.50
1.8
2.1
2.4
2.7
3.0
3.3
VCC (V)
VL (V)
VTRM vs. VCC
RISE- AND FALL-TIME MATCHING
3.6
MAX3344E/45E toc09
MAX3344E/45E toc08
3.4
VTRM (V)
IVCC (µA)
29
4.75
3.5
MAX3344E/45E toc07
30
6
3
4.00
VCC CURRENT CONSUMPTION IN
SUSPEND MODE
31
7
4
VCC (V)
32
8
TA = +85°C
0.4
4.00
9
5
0.8
0.6
TA = -40°C
MAX3344E/45E toc06
1.8
IVL (µA)
12
10
MAX3344E/45E toc05
13
2.0
TRANSMITTER SKEW (ns)
TA = +85°C
14
PROPAGATION DELAY (ns)
MAX3344E/45E toc04
15
LOGIC CURRENT CONSUMPTION IN
SUSPEND MODE
TRANSMITTER SKEW vs. VCC
f = 6MHz
D+
3.3
1V/div
3.2
D-
25
3.1
24
23
IVTRM = 15mA
3.0
22
4.00
4.25
4.50
4.75
5.00
5.25
4.00
5.50
4.25
4.50
4.75
5.00
5.25
VCC (V)
VCC (V)
SUSPEND RESPONSE
TRANSMISSION IN SUSPEND MODE
(SUSP = 1)
MAX3344E/45E toc10
20ns/div
5.50
USB_DET RESPONSE
MAX3344E/45E toc12
MAX3344E/45E toc11
VPO
VCC
SUSP
0
VMO
2V/div
2V/div
0
2V/div
RCV
D+
0
D-
100ns/div
USB_DET
0
2µs/div
10µs/div
_______________________________________________________________________________________
5
MAX3344E/MAX3345E
Typical Operating Characteristics (continued)
(VCC = 5V, VL = 3.3V, TA = +25°C, unless otherwise noted.)
±15kV ESD-Protected USB Transceivers
in UCSP with USB Detect
MAX3344E/MAX3345E
Pin Description
PIN
NAME
INPUT/
OUTPUT
FUNCTION
D2
RCV
Output
Receiver Output. Single-ended CMOS output. RCV responds to the differential input
on D+ and D-.
D1
VPO
Input
Logic-Level Data Input. VPO is level translated to D+.
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.
TSSOP
UCSP
1
2
3
C2
MODE
Input
4
C1
VMO
Input
Logic-Level Data Input. VMO is level translated to D-.
5
B1
OE
Input
Output Enable. Drive OE low to enable data transmission on D+ and D-. Drive OE
high to disable data transmission or to receive data.
6
B2
SUSP
Input
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.
7
A1
VPI
Output
Logic-Level Data Output. VPI is the level-translated value of D+.
8
A2
VMI
Output
Logic-Level Data Output. VMI is the level-translated value of D-.
9
B3
ENUM
Input
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.
10
A3
VCC
Power
USB-Side Power-Supply Input. Connect VCC to the incoming USB power supply.
Bypass VCC to GND with a 1µF ceramic capacitor.
11
A4
GND
Power
Ground
12
B4
D-
Input/
Output
Negative USB Differential Data Input/Output. Connect to the USB’s D- signal through
a 23.7Ω ±1% resistor.
13
C4
D+
Input/
Output
Positive USB Differential Data Input/Output. Connect to the USB’s D+ signal through
a 23.7Ω ±1% resistor.
14
D4
VTRM
Power
Regulated Output Voltage. VTRM provides a 3.3V output derived from VCC. Bypass
VTRM to GND with a 1µF (min) low-ESR capacitor, such as ceramic or plastic film types.
15
D3
VL
Power
System-Side Power-Supply Input. Connect to the system’s logic-level power supply,
1.65V to 3.6V.
Output
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. 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).
16
C3
USB_DET
Detailed Description
The MAX3344E/MAX3345E are bidirectional transceivers
that convert single-ended or differential logic-level signals
to differential USB signals, and convert differential USB
signals to single-ended or differential logic-level signals.
The MAX3344E/MAX3345E are operational from VCC =
5.5V to VCC = 3V (electrical specifications are not guaranteed for VCC < 4V). Both devices include an internal
1.5kΩ pullup resistor that connects and disconnects D+
to VTRM (see the Functional Diagram).
The MAX3344E/MAX3345E are tolerant to power sequencing with either VCC > VL or VL > VCC. Additionally,
6
the USB I/O, D+ and D-, and VCC are ESD protected to
±15kV. The MAX3344E/MAX3345E can receive USB
power (V CC) directly from the USB connection and
operate with logic supplies (VL) down to 1.65V, while
still meeting the USB physical layer specifications. The
MAX3344E/MAX3345E support full-speed (12Mbps)
USB specification 2.0 operation.
The MAX3344E/MAX3345E have an enumerate feature
that functions when power is applied. Driving ENUM low
disconnects the internal 1.5kΩ pullup 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.
_______________________________________________________________________________________
±15kV ESD-Protected USB Transceivers
in UCSP with USB Detect
Device Control
Normal Operating Mode
Connect VL and VCC to system power supplies (Table
1). Connect VL to a +1.65V to +3.6V supply. Connect
V CC to a +4.0V to +5.5V supply. Alternatively, the
MAX3344E/MAX3345E can derive power from a single
Li+ battery. Connect the battery to VCC. VVTRM remains
above +3.0V for VCC as low as +3.1V.
Additionally, the MAX3344E/MAX3345E can derive
power from a 3.3V ±10% voltage regulator. Connect VCC
and VTRM to an external +3.3V voltage regulator.
D+ and DD+ and D- are the USB-side transmitter I/O connections, and are ESD protected to ±15kV using the
Human Body Model, ±10kV using IEC 1000-4-2 AirGap Discharge, and ±8kV using IEC 1000-4-2 Contact
Discharge, making the MAX3344E/MAX3345E ideal for
applications where a robust transmitter is required. A
23.7Ω resistor is required on D+ and D- for normal
operation (see the External Resistors section).
Disable Mode
Connect VCC to a system power supply and leave VL
unconnected or connect to GND. D+ and D- enter a tristate mode and VCC consumes less than 20µA of supply
current. D+ and D- withstand external signals up to
+5.5V in disable mode (Table 2).
ENUM
USB specification 2.0 requires a 1.5kΩ pullup resistor
on D+ for full-speed (12Mbps) operation. Controlled by
enumerate (ENUM), the MAX3344E/MAX3345E provide
this internal 1.5kΩ resistor. Drive ENUM high to connect
the pullup resistor from D+ to VTRM. Drive ENUM low to
disconnect the pullup resistor from D+ to VTRM.
Sharing Mode
Connect VL to a system power supply and leave VCC (or
VCC and VTRM) unconnected or connect to GND. D+
and D- enter a tri-state mode, allowing other circuitry to
share the USB D+ and D- lines, and VL consumes less
than 20µA of supply current. D+ and D- withstand external signals up to +5.5V in sharing mode (Table 2).
VPO/VMO, VPI/VMI, and OE
The MAX3344E/MAX3345E system-side inputs are VPO
and VMO. Data comes into the MAX3344E/MAX3345E
through VPO and VMO. VPO and VMO operate either
differentially with VPO as the positive terminal and VMO
as the negative terminal, or single ended with VPO as
the data input (see the MODE section).
Table 1. Power-Supply Configurations
VCC (V)
VTRM (V)
VL (V)
CONFIGURATION
NOTES
+4.0 to +5.5
+3.3 Output
+1.65 to +3.6
Normal mode
—
+3.1 to +4.5
+3.3 Output
+1.65 to +3.6
Battery supply
—
+3.0 to +3.6
+3.0 to +3.6 Input
+1.65 to +3.6
Voltage regulator supply
—
GND or floating
Output
+1.65 to +3.6
Sharing mode
Table 2
+3.0 to +5.5
Output
GND or floating
Disable mode
Table 2
Table 2. Disable-Mode and Sharing-Mode Configurations
INPUTS/OUTPUTS
DISABLE MODE
+5V input/+3.3V output
+3.3V input/+3.3V input
+3.7V input/+3.3V output
SHARING MODE
•
•
•
Floating or connected to GND
< +3.6V (MAX3344E)
< +1.0V (MAX3345E)
VCC/VTRM
•
•
•
VL
Floating or connected to GND
+1.65V to +3.6V input
D+ and D-
High impedance
High impedance
VPI and VMI
Invalid*
RCV
Invalid*
Undefined**
SPEED, SUSP, OE, ENUM
High impedance
High impedance
High impedance for OE = Low
High for OE = High
*High Impedance or low.
**High or low.
_______________________________________________________________________________________
7
MAX3344E/MAX3345E
Power-Supply Configurations
MAX3344E/MAX3345E
±15kV ESD-Protected USB Transceivers
in UCSP with USB Detect
The MAX3344E/MAX3345E system-side outputs are
VPI, VMI, and RCV. The MAX3344E/MAX3345E send
data through VPI, VMI, and RCV. VPI and VMI are outputs to the single-ended receivers and RCV is the output of the differential receiver.
Output enable (OE) controls data transmission. Drive OE
low to enable data transmission on D+ and D-. Drive OE
high to disable data transmission or receive data.
MODE
MODE is a control input that selects whether differential
or single-ended logic signals are recognized by the
system side of the MAX3344E/MAX3345E. Drive MODE
high to select differential mode with VPO as the positive
terminal and VMO as the negative terminal. Drive
MODE low to select single-ended mode with VPO as
the data input (Table 3).
VTRM
VTRM is the 3.3V output of the internal linear voltage
regulator. VTRM powers the internal circuitry of the USB
side of the MAX3344E/MAX3345E. Connect a 1µF (min)
low-ESR ceramic or plastic capacitor from VTRM to
GND, as close to VTRM as possible. Do not use VTRM
to power external circuitry.
VCC
Bypass VCC to GND with a 1µF ceramic capacitor as
close to the device as possible. If VCC drops below the
USB detect threshold, supply current drops
below 20µA avoiding excessive VCC current consumption, and D+/D- enter a high-impedance state allowing
other devices to drive the lines.
USB Detect
USB detect output (USB_DET) signals that VCC is present. A high at USB_DET indicates that VCC is present,
while a low at USB_DET indicates that VCC is not present. 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).
RC
1MΩ
CHARGE-CURRENTLIMIT RESISTOR
HIGHVOLTAGE
DC
SOURCE
Cs
100pF
RD
1500Ω
DISCHARGE
RESISTANCE
DEVICE
UNDER
TEST
STORAGE
CAPACITOR
Figure 1a. Human Body ESD Test Models
IP 100%
90%
Ir
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
AMPERES
36.8%
10%
0
0
tRL
TIME
tDL
CURRENT WAVEFORM
Figure 1b. Human Body Model Current Waveform
RC
50MΩ TO 100MΩ
CHARGE-CURRENTLIMIT RESISTOR
HIGHVOLTAGE
DC
SOURCE
Cs
150pF
RD
330Ω
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
DEVICE
UNDER
TEST
SUSP
Suspend (SUSP) is a control input. Force SUSP high to
place the MAX3344E/MAX3345E in a low-power state.
In this state, the quiescent supply current into VCC is
less than 40µA and RCV goes low.
In suspend mode, VPI and VMI remain active as
receive outputs and VTRM stays on. The MAX3344E/
MAX3345E continue to receive data from the USB,
allowing the µP to sense activity on the D+/D- lines and
wake up the MAX3344E/MAX3345E.
The MAX3344E/MAX3345E can also transmit data to
D+ and D- while in suspend mode. This function is
8
Figure 1c. IEC 1000-4-2 ESD Test Model
used to signal a remote wake-up by driving a signal on
D+ and D- for a period of 1ms to 15ms. In suspend
mode, data can only be transmitted with full-speed
slope control.
_______________________________________________________________________________________
±15kV ESD-Protected USB Transceivers
in UCSP with USB Detect
OE
Receiving Data from the USB
Data received from the USB are output to VPI/VMI in
either of two ways, differentially or single ended. To
receive data from the USB, force OE high and SUSP low.
Differential data arriving at D+/D- appear as differential
logic signals at VPI/VMI, and as a single-ended logic signal at RCV. If both D+ and D- are low, then VPI and VMI
are low, signaling a single-ended zero condition on the
bus; RCV remains in the last known state (Table 3).
VL/2
0V
tPDZ
tPZD
VOHD - 0.3V
D+/DVOLD + 0.3V
Transmitting Data to the USB
The MAX3344E/MAX3345E output data to the USB differentially on D+ and D-. The logic driving signals can
be either differential or single ended. For sending differential logic, force MODE high, force OE and SUSP low,
and apply data to VPO and VMO. D+ then follows VPO,
and D- follows VMO. To send single-ended logic signals, force MODE, SUSP, and OE low, and apply data to
VPO/VMO.
tPLHO
To protect the MAX3344E/MAX3345E against ESD, D+
and D- have extra protection against static electricity to
protect the device up to ±15kV. The ESD structures
withstand high ESD in all states — normal operation,
suspend, and powered down. For the 15kV ESD structures to work correctly, a 1µF or greater capacitor must
be connected from VTRM to GND.
Figure 2. Enable and Disable Timing, Transmitter
VL
VL/2
VPO
ESD Protection
0V
tPHLO
VTRM
D+
0V
D-
ESD protection can be tested in various ways; the D+
and D- input/output pins are characterized for protection
to the following limits:
Figure 3. Mode 0 Timing
VL
VPO
VL/2
1) ±15kV using the Human Body Model
2) ±8kV using the IEC 1000-4-2 Contact Discharge
Method
3) ±10kV using the IEC 1000-4-2 Air-Gap Method
0V
tPHL1
tPLH1
VL
VL/2
VL/2
VMO
0V
tPLH1
tPLH1
VTRM
D+
0V
D-
ESD Test Conditions
ESD performance depends on a variety of conditions.
Contact Maxim for a reliability report that documents test
setup, test methodology, and test results.
Human Body Model
Figure 1a shows the Human Body Model, and Figure 1b
shows the current waveform it generates when discharged into a low impedance. This model consists of a
100pF capacitor charged to the ESD voltage of interest,
which is then discharged into the test device through a
1.5kΩ resistor.
Figure 4. Mode 1 Timing
_______________________________________________________________________________________
9
MAX3344E/MAX3345E
Data Transfer
VL
MAX3344E/MAX3345E
±15kV ESD-Protected USB Transceivers
in UCSP with USB Detect
Table 3a. Truth Table Transmit (SUSP = 0, OE = 0, ENUM = X)
INPUT
OUTPUT
MODE
VPO
VMO
D+
D-
RCV
VPI
VMI
RESULT
0
0
0
0
1
0
0
1
LOGIC 0
0
0
1
0
0
RCV*
0
0
SE0
0
1
0
1
0
1
1
0
LOGIC 1
0
1
1
0
0
RCV*
0
0
SE0
1
0
0
0
0
RCV*
0
0
SE0
1
0
1
0
1
0
0
1
LOGIC 0
1
1
0
1
0
1
1
0
LOGIC 1
1
1
1
1
1
X
1
1
UNDEFINED
*RCV denotes the signal level on output RCV just before SE0 state occurs. This level is stable during the SE0 period.
Table 3b. Truth Table Receive (SUSP = 0, OE = 1, ENUM = X)
INPUT
OUTPUT
D+
D-
RCV
VPI
VMI
RESULT
0
0
RCV*
0
0
SE0
0
1
0
0
1
LOGIC 0
1
0
1
1
0
LOGIC 1
1
1
X
1
1
UNDEFINED
*RCV denotes the signal level on output RCV just before SE0 state occurs. This level is stable during the SE0 period.
Table 3c. Truth Table Transmit in Suspend* (SUSP = 1, OE = 0, ENUM = X)
INPUT
OUTPUT
MODE
VPO
VMO
0
0
0
0
0
1
0
1
0
0
1
1
0
1
D+
D-
RCV
VPI
VMI
RESULT
0
1
0
0
0
0
0
1
LOGIC 0
0
0
1
0
SE0
0
1
0
LOGIC 1
1
0
0
0
0
0
0
0
SE0
0
0
0
0
0
1
0
SE0
1
0
0
1
LOGIC 0
1
1
0
1
1
1
1
0
0
1
0
LOGIC 1
1
1
0
1
1
UNDEFINED
*Timing specifications are not guaranteed for D+ and D-.
Table 3d. Truth Table Receive in Suspend* (SUSP = 1, OE = 1, MODE = X, VPO/VMO = X,
ENUM = X)
INPUT
OUTPUT
D+
D-
RCV
VPI
VMI
RESULT
0
0
0
0
0
VPI/VMI ACTIVE
0
1
0
0
1
VPI/VMI ACTIVE
1
0
0
1
0
VPI/VMI ACTIVE
1
1
0
1
1
VPI/VMI ACTIVE
*Timing specifications are not guaranteed for D+ and D-.
10
______________________________________________________________________________________
±15kV ESD-Protected USB Transceivers
in UCSP with USB Detect
The Air-Gap Discharge Method involves approaching
the device with a charged probe. The Contact
Discharge Method connects the probe to the device
before the probe is energized.
Machine Model
The Machine Model for ESD tests all pins using a 200pF
storage capacitor and zero discharge resistance. Its
objective is to emulate the stress caused by contact that
occurs with handling and assembly during manufacturing. All pins require this protection during manufacturing. Therefore, after PC board assembly, the Machine
Model is less relevant to I/O ports.
Applications Information
External Components
External Resistors
Two external 23.7Ω ±1% to 27.4Ω ±1%, 1/2W resistors
are required for USB connection. Place the resistors
in between the MAX3344E/MAX3345E and the USB
connector on the D+ and D- lines (see the Typical
Operating Circuit).
External Capacitors
Use three external capacitors for proper operation. Use
a 0.1µF ceramic for decoupling VL, a 1µF ceramic for
decoupling VCC, and a 1.0µF (min) ceramic or plastic
filter capacitor on VTRM. Return all capacitors to GND.
UCSP Applications Information
For the latest application details on UCSP construction,
dimensions, tape carrier information, printed circuit board
techniques, 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 available on
Maxim’s website at www.maxim-ic.com/ucsp.
Chip Information
TRANSISTOR COUNT: 2162
PROCESS: BiCMOS
______________________________________________________________________________________
11
MAX3344E/MAX3345E
IEC 1000-4-2
The IEC 1000-4-2 standard covers ESD testing and performance of finished equipment; it does not specifically
refer to integrated circuits. The MAX3344E/MAX3345E
help the user design equipment that meets level 4 of IEC
1000-4-2, without the need for additional ESD-protection
components.
The major difference between tests done using the
Human Body Model and IEC 1000-4-2 is a higher peak
current in IEC 1000-4-2, because series resistance is
lower in the IEC 1000-4-2 model. Hence, the ESD withstand voltage measured to IEC 1000-4-2 is generally
lower than that measured using the Human Body Model.
Figure 1c shows the IEC 1000-4-2 model.
MAX3344E/MAX3345E
±15kV ESD-Protected USB Transceivers
in UCSP with USB Detect
D+
3V
D-
0V
tPHL(RCV)
tPLH(RCV)
VL
RCV
VL/2
0V
tPHL(SE)
tPLH(SE)
VL
VPI
VL/2
0V
tPLH(SE)
tPHL(SE)
VMI
VL
VL/2
0V
D+/D- RISE/FALL TIMES ≤ 8ns, VL = 1.65V, 2.5V, 3.3V
Figure 5. D+/D- to RCV, VPI, VMI Propagation Delays
TEST POINT
3.3V
D+
MAX3344E
MAX3345E
23.7Ω
TEST POINT
VMI OR VPI OR RCV
1.5kΩ
CL= 50pF
15kΩ
25pF
MAX3344E
MAX3345E
TEST POINT
(a) LOAD FOR VPI, VMI, AND RCV
23.7Ω
DCL= 50pF
USB_DET
15kΩ
MAX3344E
MAX3345E
23.7Ω
TEST POINT
200Ω
D+ OR D25pF
50pF
+
-
(b) LOAD FOR D+, D-, AND USB_DET
(c) LOAD FOR ENABLE AND DISABLE TIME, D+/D-
Figure 6. Test Circuits
12
______________________________________________________________________________________
GND
OR VCC
±15kV ESD-Protected USB Transceivers
in UCSP with USB Detect
USB SUPPLY
VCC
LINEAR
REGULATOR
VL
Vbg
BANDGAP
VTRM
TO INTERNAL CIRCUITS
MAX3344E
MAX3345E
ENUM
RCV
RECEIVER
GND
1.5kΩ
SUSP
TRANSMITTER
D-
23.7Ω
VMO
MODE
D+
VPO
OE
23.7Ω
EXTERNAL RESISTORS
TO INTERNAL CIRCUITS
VMI
USB_DET
VPI
Vbg
SINGLE-ENDED RECEIVERS
Pin Configurations
1
TOP VIEW
RCV 1
16 USB_DET
VPO
2
15 VL
MODE
3
14 VTRM
VMO 4
OE 5
MAX3344E
MAX3345E
13 D+
12 D-
SUSP 6
11 GND
VPI 7
10 VCC
VMI 8
9
TSSOP
ENUM
2
3
4
BOTTOM VIEW
MAX3344E/MAX3345E
D
VPO
RCV
VL
VTRM
C
VMO
MODE USB_DET
D+
OE
SUSP
ENUM
D-
VPI
VMI
VCC
GND
B
A
UCSP
______________________________________________________________________________________
13
MAX3344E/MAX3345E
Functional Diagram
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
16L,UCSP.EPS
MAX3344E/MAX3345E
±15kV ESD-Protected USB Transceivers
in UCSP with USB Detect
PACKAGE OUTLINE, 4x4 UCSP
21-0101
14
______________________________________________________________________________________
H
1
1
±15kV ESD-Protected USB Transceivers
in UCSP with USB Detect
TSSOP4.40mm.EPS
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15
© 2004 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
MAX3344E/MAX3345E
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
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