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PDF MAX3344E Data sheet ( Hoja de datos )
| Número de pieza | MAX3344E | |
| Descripción | +-5kV ESD-Protected USB Transceivers | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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19-3171; Rev 0; 2/04
www.DataSheet4U.com
±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 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 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.
Applications
Cell Phones
PC Peripherals
Information Appliances
Data Cradles
PDAs
MP3 Players
Digital Cameras
Features
♦ ±15kV ESD Protection On D+ and D-
♦ Comply with USB Specification 1.1 (Full Speed 2.0)
♦ Separate VP and VM Inputs/Outputs
♦ VL 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
PART
MAX3344EEUE
MAX3344EEBE-T
MAX3345EEUE
MAX3345EEBE-T
Ordering Information
TEMP RANGE
PIN-PACKAGE
-40°C to +85°C
-40°C to +85°C
16 TSSOP
4 x 4 UCSP
-40°C to +85°C
-40°C to +85°C
16 TSSOP
4 x 4 UCSP
Pin Configurations appear at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
Typical Operating Circuit
SYSTEM
SUPPLY
VOLTAGE
0.1µF
SYSTEM INTERFACE
VL
RCV MAX3344E/
VPI MAX3345E
VMI
SUSP
OE
USB_DET
MODE
ENUM
VPO
VMO GND
VCC
D+
D-
VTRM
1µF
23.7Ω
23.7Ω
VBUS
D+
D-
GND
1µF USB
INTERFACE
CONNECTOR
________________________________________________________________ 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.
1 page  
www.DataSheet4U.com
±15kV ESD-Protected USB Transceivers
in UCSP with USB Detect
Typical Operating Characteristics (continued)
(VCC = 5V, VL = 3.3V, TA = +25°C, unless otherwise noted.)
SINGLE-ENDED RECEIVER PROPAGATION
DELAY vs. VCC
15
TA = +85°C
14
13
12
11
TA = +25°C
10
9
8 TA = -40°C
7
4.00 4.25 4.50 4.75 5.00 5.25 5.50
VCC (V)
VCC CURRENT CONSUMPTION IN
SUSPEND MODE
32
31
30
29
28
27
26
25
24
23
22
4.00 4.25 4.50 4.75 5.00 5.25 5.50
VCC (V)
SUSPEND RESPONSE
MAX3344E/45E toc10
SUSP
0
2V/div
RCV
0
TRANSMITTER SKEW vs. VCC
2.0
1.8
1.6 TA = -40°C
1.4
1.2
1.0 TA = +25°C
0.8 TA = +85°C
0.6
0.4
4.00 4.25 4.50 4.75 5.00 5.25 5.50
VCC (V)
LOGIC CURRENT CONSUMPTION IN
SUSPEND MODE
10
9
8
7
6
5
4
3
1.5 1.8 2.1 2.4 2.7 3.0 3.3 3.6
VL (V)
VTRM vs. VCC
3.5
3.4
3.3
3.2
RISE- AND FALL-TIME MATCHING
MAX3344E/45E toc09
f = 6MHz
D+
1V/div
D-
3.1
IVTRM = 15mA
3.0
4.00 4.25 4.50 4.75 5.00 5.25 5.50
VCC (V)
TRANSMISSION IN SUSPEND MODE
(SUSP = 1)
MAX3344E/45E toc11
20ns/div
USB_DET RESPONSE
MAX3344E/45E toc12
VPO
VMO
2V/div
D+
D-
VCC
2V/div
0
USB_DET
0
100ns/div
2µs/div
10µs/div
_______________________________________________________________________________________ 5
5 Page 
www.DataSheet4U.com
±15kV ESD-Protected USB Transceivers
in UCSP with USB Detect
IEC 1000-4-2
The IEC 1000-4-2 standard covers ESD testing and per-
formance 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 with-
stand 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.
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 manufactur-
ing. All pins require this protection during manufactur-
ing. 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
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet MAX3344E.PDF ] | |
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