USB1T20 — Universal Serial Bus Transceiver
May 2013
USB1T20 — Universal Serial Bus Transceiver
Features
Complies with Universal Serial Bus Specification
2.0 for FS/LS Applications
Utilizes Digital Inputs and Outputs to Transmit and
Receive USB Cable Data
Supports 12Mbit/s Full Speed (FS) and 1.5Mbit/s
Low Speed (LS) Serial Data Transmission
Supports Single-ended and Differential Data
Interface as Function of MODE
Single 3.3 V Supply
ESD Performance: Human Body Model
-
9.5 kV on D-, D+ Pins Only
-
4.0 kV on All Other Pins
Description
USB1T20 is a generic USB 2.0 compliant transceiver.
Using a single voltage supply, the USB1T20 provides an
ideal USB interface solution for any electronic device
able to supply 3.0 V to 3.6 V. It is designed to allow
5.0 V or 3.3 V programmable and standard logic to
interface with the physical layer of the Universal Serial
Bus (USB). It is capable of transmitting and receiving
serial data at both full speed (12Mbit/s) and low speed
(1.5Mbit/s) data rates.
Packaged in industry-standard TSSOP package. The
USB1T20 is ideal for mobile electronics and other
space-constrained applications.
Ordering Information
Part Number
USB1T20MTCX
Operating
Temperature Range
-40° to +85°C
Package
14-Lead, Thin-Shrink Small-Outline Package (TSSOP)
JEDEC MO-153, 4.4mm Wide
D-
Packing
Method
Tape and Reel
/OE
SPEED
V
MO
/F
SE0
V
PO
D+
+
-
RCV
V
P
V
M
Figure 1. Logic Diagram
© 2004 Fairchild Semiconductor Corporation
USB1T20 • Rev. 1.0.3
www.fairchildsemi.com
USB1T20 — Universal Serial Bus Transceiver
Pin Configuration
MODE
1
14
V
CC
V
MO
/F
SEO
V
PO
/OE
2
13
RCV
3
12
V
P
V
M
SUSPND
4
11
D+
5
10
D-
6
9
SPEED
GND
7
8
NC
Figure 2. Pin Configuration (Top View)
Pin Definitions
Pin #
1
2
3
Name
MODE
/OE
RCV
I/O
I
I
O
Description
Mode.
When left unconnected, a weak pull-up transistor pulls mode pin to V
CC
and, in
this GND, the V
MO
/F
SEO
pin takes the function of F
SEO
(force SEO).
Output Enable.
Active LOW; enables the transceiver to transmit data on the bus.
When not active, the transceiver is in receive mode.
Receive Data.
CMOS-Level output for USB differential input.
Gated version of D- and D+. Outputs are logic “0” and logic “1.” Used to detect single
ended zero (/SEO), error conditions, and interconnected speed. (Input to SIE).
V
P
V
M
0
1
0
1
RESULT
/SEO
Low Speed
Full Speed
Error
4, 5
V
P
,V
M
O
0
0
1
0
6
7
8
9
10, 11
SUSPND
GND
NC
SPEED
D-, D+
I
Suspend.
Enables a low-power state while the USB bus is inactive. While the suspend
pin is active, it drives the RCV pin to a logic “0” state. Both D+ and D- are
3-state.
Ground reference.
No connect.
Edge Rate Control.
Logic “1” operates at edge rates for full speed. Logic “0” operates
edge rates for low speed.
Data+, Data-. Differential data bus conforming to the Universal Serial Bus standard.
Inputs to differential driver. (Outputs from SIE.)
Mode
V
PO
V
MO
/F
SEO
RESULT
I
AI/O
0
0
12, 13
V
PO
,V
MO
/F
SEO
I
0
1
0
1
0
1
0
1
Logic “0”
/SEO
Logic “1”
/SEO
/SEO
Logic “0”
Logic “1”
Illegal Code
0
1
1
0
0
1
1
1
14
V
CC
3.0 to 3.6 power supply.
www.fairchildsemi.com
2
© 2004 Fairchild Semiconductor Corporation
USB1T20 • Rev. 1.0.3
USB1T20 — Universal Serial Bus Transceiver
Functional Truth Table
Input
Mode
0
0
0
0
1
1
1
1
Don’t
Care
Don’t
Care
I/O
D+
0
0
1
0
0
0
1
1
3-
State
3-
State
Outputs
D-
1
0
0
0
0
1
0
1
V
PO
0
0
1
1
0
0
1
1
Don’t
Care
Don’t
Care
V
MO
/F
SEO
/OE SUSPND
0
1
0
1
0
1
0
1
Don’t
Care
Don’t
Care
0
0
0
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
0
1
RCV
0
Undefined
State
1
Undefined
State
Undefined
State
0
1
Undefined
State
Undefined
State
Undefined
State
V
P
0
0
1
0
0
0
1
Undefined
State
Undefined
State
Undefined
State
V
M
1
0
0
0
0
1
0
Undefined
State
Undefined
State
Undefined
State
Result
Logic “0”
/SEO
Logic “1”
/SEO
/SEO
Logic “0”
Logic “1”
Illegal
Code
D+/D-
Hi-Z
D+/D-
Hi-Z
3-
State
3-
State
© 2004 Fairchild Semiconductor Corporation
USB1T20 • Rev. 1.0.3
www.fairchildsemi.com
3
USB1T20 — Universal Serial Bus Transceiver
Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be
operable above the recommended operating conditions and stressing the parts to these levels is not recommended.
In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability.
The absolute maximum ratings are stress ratings only.
Symbol
V
CC
I
IK
V
IN
V
I/O
I
OK
V
O
I
O
I
CC
/ I
GND
T
STG
DC Supply Voltage
Parameter
DC Input Diode Current, V
IN
< 0 V
Input Voltage
(1)
Input / Output Voltage
Output Diode Current, V
O
> V
CC
or V
O
< 0 V
Output Voltage
(1)
Min.
-0.5
-0.5
-0.5
-0.5
Max.
7.0
-50
5.5
V
CC
+ 0.5
±50
V
CC
+ 0.5
±15
±50
±100
Unit
V
mA
V
V
mA
V
mA
mA
°C
Output Source or Sink Current
(V
O
= 0 to V
CC
)
V
CC
/ GND Current
Storage Temperature Range
V
P
, V
M
, RCV Pins
D+/D- Pins
-60
+150
Note:
1. The input and output negative voltage ratings may be exceeded if the input and output diode current ratings are
observed.
Recommended Operating Conditions
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended
operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not
recommend exceeding them or designing to Absolute Maximum Ratings.
Symbol
V
CC
V
IN
V
AI/O
V
O
T
A
Supply Voltage
Input Voltage
Input Range for AI/0
Output Voltage
Parameter
Min.
3.0
0
0
0
-40
Max.
3.6
5.5
V
CC
V
CC
+85
Unit
V
V
V
V
°C
Operating Ambient Temperature, Free Air
© 2004 Fairchild Semiconductor Corporation
USB1T20 • Rev. 1.0.3
www.fairchildsemi.com
4
USB1T20 — Universal Serial Bus Transceiver
DC Electrical Characteristics Digital Pins
Over the recommended range of supply voltage and operating free air temperature unless otherwise noted. V
CC
=
3.0 V to 3.6 V.
Symbol
Input Levels
V
IL
V
IH
Parameter
Conditions
T
A
= -40 to +85°C
Min.
Typ.
Max.
0.8
2
Units
Low-Level Input Voltage
High-Level Input Voltage
I
OL
= 4 mA
I
OL
= 20
µA
I
OH
= 4 mA
I
OH
= 20
µA
V
CC
= 3.0 to 3.6 V
V
CC
= 3.0 to 3.6 V
V
CC
= 3.0 to 3.6 V
V
CC
= 3.0 to 3.6 V,
V
IN
= V
CC
or GND
V
CC
= 3.0 to 3.6 V,
Mode = V
CC
2.4
V
CC
-0.1
V
V
Output Levels
V
OL
V
OH
Low-Level Output Voltage
High-Level Output Voltage
0.4
0.1
V
V
Leakage Current
I
IN
I
CCFS
I
CCLS
I
CCQ
I
CCS
Input Leakage Current
Supply Current, Full Speed
Supply Current, Low Speed
Quiescent Supply Current
Supply Current in Suspend
±5
5
5
5
10
µA
mA
mA
mA
µA
DC Electrical Characteristics D+/D- Pins
Over the recommended range of supply voltage and operating free air temperature unless otherwise noted. V
CC
=
3.0V to 3.6V.
Symbol
Input Levels
V
DI
V
CM
V
SE
V
OL
V
OH
V
CR
Parameter
Conditions
T
A
=-40 to +85°C
Min.
0.2
0.8
0.8
2.5
2.0
0.3
2.8
1.3
3.6
2.0
Typ.
Max.
Units
Differential Input Sensitivity
Differential Common-Mode Range
Single-Ended Receiver Threshold
Static Output Low-Voltage
Static Output High-Voltage
Differential Crossover
High-Z State Data Line Leakage
Current
Transceiver Capacitance
(2)
Capacitance Match
(2)
Driver Output Resistance
(3)
Resistance Match
(3)
(D+)
– (D-)
Includes V
DI
Range
V
V
V
V
V
V
Output Levels
R
L
of 1.5 kto 3.6 V
R
L
of 1.5 kto GND
Leakage Current
I
OZ
Capacitance
C
IN
Pin to GND
10
10
Steady-State Drive
4
20
10
pF
%
%
0 V<V
IN
<3.3 V
±5
µA
Output Resistance
Z
DRV
Notes:
2. This specification is guaranteed by design and statistical process distribution.
3. Excludes external resistor. To comply with USB specification 1.1, external series resistors of 24
±1% each on
D+ and D- are recommended.
© 2004 Fairchild Semiconductor Corporation
USB1T20 • Rev. 1.0.3
www.fairchildsemi.com
5
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