MAX14978ETO+ Maxim Integrated Products, MAX14978ETO+ Datasheet

Analog Switch ICs USB 2.0/3.0 SWITCH High BW LVDS Switch

MAX14978ETO+

Manufacturer Part Number
MAX14978ETO+
Description
Analog Switch ICs USB 2.0/3.0 SWITCH High BW LVDS Switch
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX14978ETO+

On Resistance (max)
10 Ohms
On Time (max)
250 ns
Off Time (max)
50 ns
Off Isolation (typ)
- 17 dB
Bandwidth
950 MHz
Supply Voltage (max)
5.5 V
Supply Voltage (min)
3 V
Supply Current
60 uA
Maximum Power Dissipation
2857 mW
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
TQFN-42
Off State Leakage Current (max)
250 nA
Propagation Delay Time
100 ps
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
19-5573; Rev 0; 9/10
The MAX14978 high-performance, passive analog switch
is ideal for switching Hi-Speed USB and SuperSpeed USB
data between one source and two loads, or vice versa. The
device can be used in desktop and notebook applications
where SuperSpeed USB ports are in limited supply. The
device consists of two sets of analog switches with one
set used for USB low-speed, full-speed, and Hi-Speed
signals and the second set used for USB SuperSpeed.
The device operates from a single +3.3V supply.
The device features low insertion loss for all speeds. It
has Q6kV Human Body Model (HBM) ESD protection
on all I/O pins. In addition, the low/full/Hi-Speed COM_
ports have ESD protection to Q15kV HBM and Q8kV IEC
61000-4-2 contact.
The device is available in a small, 3.5mm x 9.0mm,
42-pin TQFN package and is specified over the extend-
ed -40NC to +85NC temperature range.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Desktop PCs
Laptop PCs
Industrial USB Switching
_______________________________________________________________ Maxim Integrated Products 1
SUPERSPEED
CONTROLLER
CONTROLLER
USB SWITCH
USB
General Description
Tx+
Rx+
Rx-
Tx-
D+
D-
Applications
SuperSpeed USB Passive Switch
COMD+
COMD-
COM0+
COM0-
COM1+
COM1-
EN
SEL1 SEL2
MAX14978
GND
(Low/Full/Hi/SuperSpeed)
V
CC
+3.3V
S
S
S
S
S
S
S
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
V
DD
MAX14978ETO+
NCD+
NOD+
NCD-
NOD-
NC0+
NC1+
NO0+
NO1+
NC0-
NC1-
NO0-
NO1-
Designed for SuperSpeed USB Applications:
Superior Return Loss and Insertion Loss for
SuperSpeed Analog Switches
Low Quiescent Current: 36µA (typ)
All Link Training is Preserved (SuperSpeed)
LVCMOS Control (1.4V P V
Operation from a Single +3.3V Power Supply
Small, 3.5mm x 9.0mm, 42-Pin TQFN Package
Low/Full/Hi-Speed (1.5/12/480Mbps)
SuperSpeed (5.0Gbps)
0.1µF
PART
Typical Operating Circuit
-40NC to +85NC
TEMP RANGE
Ordering Information
D+
D-
Tx+
Tx-
Rx+
Rx-
D+
D-
Tx+
Tx-
Rx+
Rx-
SUPERSPEED
SUPERSPEED
PORT1
PORT2
USB
USB
IH
P 3.6V)
PIN-PACKAGE
42 TQFN-EP*
Features

Related parts for MAX14978ETO+

MAX14978ETO+ Summary of contents

Page 1

... SuperSpeed Analog Switches Low Quiescent Current: 36µA (typ) S All Link Training is Preserved (SuperSpeed) S LVCMOS Control (1. Operation from a Single +3.3V Power Supply S Small, 3.5mm x 9.0mm, 42-Pin TQFN Package S PART MAX14978ETO+ +Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad. +3.3V 0.1µF SEL1 SEL2 NCD+ NCD- ...

Page 2

SuperSpeed USB Passive Switch (Low/Full/Hi/SuperSpeed) ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND, unless otherwise noted.) V .......................................................................-0.3V to +6. .......................................................................-0.3V to +4.0V DD SEL1, EN, COMD_, NOD_, NCD_ (Note 1) ...................................... -0. SEL2, COM0_, COM1_, ...

Page 3

ELECTRICAL CHARACTERISTICS (continued +3.0V to +5.5V +3.0V to +3.6V +25NC.) (Note 2) A PARAMETER SYMBOL On-Resistance Match Between DR Channels On-Resistance Match Between DR Pairs of Same Channels On-Resistance Flatness R ...

Page 4

SuperSpeed USB Passive Switch (Low/Full/Hi/SuperSpeed) ELECTRICAL CHARACTERISTICS (continued +3.0V to +5.5V +3.0V to +3.6V +25NC.) (Note 2) A PARAMETER SYMBOL Crosstalk (Note 7) Signaling Data Rate LOGIC INPUT Input Logic-High Input ...

Page 5

ELECTRICAL CHARACTERISTICS (continued +3.0V to +5.5V +3.0V to +3.6V +25NC.) (Note 2) A PARAMETER SYMBOL Fault-Protection Recovery Time C NO(OFF) NO_ or NC_ Off-Capacitance C NC(OFF) COM_ Off-Capacitance C COM(OFF) COM_ ...

Page 6

SuperSpeed USB Passive Switch (Low/Full/Hi/SuperSpeed 0.1 µ F 0.1 µ SEL_ DD NC_ MAX14978 50Ω GND MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS. OFF-ISOLATION IS MEASURED BETWEEN ...

Page 7

F NO_ NC_+ IN+ NO_ NC_- IN- +1.5V V IN+ 50% 0V +1.5V V 50% IN PLHX +1.5V V OUT+ 50% 0V +1.5V 50% V OUT PHLY Figure ...

Page 8

SuperSpeed USB Passive Switch (Low/Full/Hi/SuperSpeed +3. COMD_ FPR NOD_ V NCD_ Figure 4. Fault Protection Response/Recovery Time ( 3.3V +25NC, unless otherwise noted ...

Page 9

V = 3.3V +25NC, unless otherwise noted SUPERSPEED HI-SPEED SWITCHES SUPPLY CURRENT vs. TEMPERATURE +3. -40 - TEMPERATURE ...

Page 10

SuperSpeed USB Passive Switch (Low/Full/Hi/SuperSpeed) TOP VIEW N.C. N.C. N.C. N.C. PIN NAME 36, N.C. No Connection. Not internally connected. 39-42 4 COMD+ Hi-Speed USB Analog Switch, Common D+ Terminal 5, 10, 14, GND Ground ...

Page 11

SuperSpeed USB Passive Switch PIN NAME Active-Low Enable Input for Hi-Speed USB Switches. Drive EN high to put Hi-Speed USB switches high impedance. Drive EN low for normal operation. Positive-Supply Voltage Input for Hi-Speed USB Switches. Bypass ...

Page 12

SuperSpeed USB Passive Switch (Low/Full/Hi/SuperSpeed) Detailed Description The MAX14978 is ideal for SuperSpeed USB and low/ full/Hi-Speed (1.5/12/480Mbps) USB switching applica- tions. The low V threshold of the device permits used with logic levels as low ...

Page 13

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 6a shows the Human Body Model, and Figure 6b shows ...

Page 14

SuperSpeed USB Passive Switch (Low/Full/Hi/SuperSpeed) Power-Supply Sequencing Caution: Do not exceed the absolute maximum rat- ings because stresses beyond the listed ratings may cause permanent damage to the device. Proper power-supply sequencing is recommended for all CMOS devices. Always apply ...

Page 15

... 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 2010 Maxim Integrated Products © ...

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