USB1T11A — Universal Serial Bus Transceiver
August 2010
USB1T11A — Universal Serial Bus Transceiver
Features
Complies with Universal Serial Bus Specification 1.1
Utilizes Digital Inputs and Outputs to Transmit and
Receive USB Cable Data
Supports 12Mbit/s “Full Speed” and 1.5Mbit/s
“Low Speed” Serial Data Transmission
Compatible with the VHDL “Serial Interface Engine”
from USB Implementers' Forum
Supports Single-ended Data Interface
Single 3.3V Supply
ESD Performance: Human Body Model
>9.5kV on D-, D+ pins only
>4kV on all other pins
Description
The USB1T11A is a one-chip, generic USB transceiver.
It is designed to allow 5.0V or 3.3V programmable and
standard logic to interface with the physical layer of the
Universal Serial Bus. It is capable of transmitting and
receiving serial data at both full-speed (12Mbit/s) and
low-speed (1.5Mbit/s) data rates.
The input and output signals of the USB1T11A conform
with the “Serial Interface Engine.” Implementation of the
serial interface engine allows designers to make USB-
compatible devices with off-the-shelf logic to modify and
update the application.
Ordering Information
Part Number
USB1T11AM
USB1T11AMX
-40 to +85°C
USB1T11AMTC
USB1T11AMTCX
Operating
Temperature
Range
Package
14-Lead, Small Outline Integrated Circuit (SOIC), JEDEC
MS-012, 0.150-Inch Narrow
14-Lead, Small Outline Integrated Circuit (SOIC), JEDEC
MS-012, 0.150-Inch Narrow
14-Lead, Thin Shrink Small Outline Package (TSSOP),
JEDEC MO-153, 4.4mm Wide
14-Lead, Thin Shrink Small Outline Package (TSSOP),
JEDEC MO-153, 4.4mm Wide
Packing
Method
Tube
Tape and
Reel
Tube
Tape and
Reel
/OE
SPEED
V
MO
/F
SE0
D-
D+
+
-
V
PO
RCV
V
P
V
M
Figure 1. Logic Diagram
© 1999 Fairchild Semiconductor Corporation
USB1T11A • Rev. 1.0.4
www.fairchildsemi.com
USB1T11A — Universal Serial Bus Transceiver
Pin Configuration
MODE
1
14
V
CC
V
MO
/F
SEO
V
PO
D+
/OE
2
13
RCV
3
12
V
P
V
M
SUSPND
4
11
5
10
D-
6
9
SPEED
GND
7
8
NC
Figure 2. TSSOP and SOIC Pin Assignments
Pin Descriptions
Pin Names
RCV
/OE
Mode
I/O
O
I
I
Description
Receive Data.
CMOS level output for USB differential input.
Output Enable.
Active LOW, enables the transceiver to transmit data on the bus.
When not active, the transceiver is in receive mode.
Mode.
When left unconnected, a weak pull-up transistor pulls it to V
CC
and, in this
GND, the V
MO
/F
SEO
pin takes the function of F
SEO
(force SEO).
Inputs to differential driver. (Outputs from SIE.)
Mode
0
0
V
PO
,V
MO
/F
SEO
I
0
0
1
1
1
1
V
PO
0
0
1
1
0
0
1
1
V
MO
/F
SEO
0
1
0
1
0
1
0
1
RESULT
Logic “0”
/SEO
Logic “1”
/SEO
/SEO
Logic “0”
Logic “1”
Illegal Code
Buffered 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
P
,V
M
O
0
0
1
0
D+, D-
SUSPND
Speed
V
CC
GND
AI/O
I
I
V
M
0
1
0
1
RESULT
/SEO
Low Speed
Full Speed
Error
Data+, Data-. Differential data bus conforming to the Universal Serial Bus standard.
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.
Edge Rate Control.
Logic “1” operates at edge rates for “full speed.” Logic “0”
operates edge rates for “low speed.”
3.0 to 3.6 power supply.
Ground reference.
© 1999 Fairchild Semiconductor Corporation
USB1T11A • Rev. 1.0.4
www.fairchildsemi.com
2
USB1T11A — 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
/OE
0
0
0
0
0
0
0
0
1
1
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
0
1
0
1
0
1
0
1
Don’t Care
Don’t Care
SUSPND
0
0
0
0
0
0
0
0
0
1
D+
0
0
1
0
0
0
1
1
3-State
3-State
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
© 1999 Fairchild Semiconductor Corporation
USB1T11A • Rev. 1.0.4
www.fairchildsemi.com
3
USB1T11A — 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
<0V
Input Voltage
Input Voltage
Output Diode Current, V
O
>V
CC
or V
O
<0
Output Voltage
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
(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
-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
Input Voltage
Input Range for AI/0
Output Voltage
Parameter
Power Supply Operating
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
© 1999 Fairchild Semiconductor Corporation
USB1T11A • Rev. 1.0.4
www.fairchildsemi.com
4
USB1T11A — Universal Serial Bus Transceiver
DC Electrical Characteristics Digital Pins
Over recommended range of supply voltage and operating free air temperature unless otherwise noted.
V
CC
= 3.0V to 3.6V.
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
=4mA
I
OL
=20µA
I
OH
=4mA
I
OH
=20µA
V
CC
=3.0 to 3.6
V
CC
=3.0 to 3.6
V
CC
=3.0 to 3.6
V
CC
=3.0 to 3.6, V
IN
=V
CC
or GND
V
CC
=3.0 to 3.6, Mode=V
CC
2.5
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 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
I
OZ
Parameter
Conditions
T
A
=-40 to +85°C
Min.
0.2
0.8
0.8
2.5
2.0
0.3
Typ.
Max.
Units
Differential Input Sensitivity
Differential Common-Mode Range
Single-Ended Receiver Threshold
Static Output Low-Voltage
Static Output High-Voltage
Differential Crossover
⎪(D+)
– (D-)⎪
Includes V
DI
Range
V
V
V
V
V
V
µA
pF
%
Ω
%
Output Levels
R
L
of 1.5kΩ to 3.6V
R
L
of 1.5kΩ to GND
2.8
1.3
3.6
2.0
±5
10
10
Steady-State Drive
4
20
10
Leakage Current
High Z-State Data Line Leakage Current 0V<V
IN
<3.3V
Transceiver Capacitance
Capacitance Match
Driver Output Resistance
Resistance Match
Pin to GND
Capacitance
C
IN
(2)
Output Resistance
Z
DRV
(3)
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 24W ±1% each on
D+ and D- are recommended.
© 1999 Fairchild Semiconductor Corporation
USB1T11A • Rev. 1.0.4
www.fairchildsemi.com
5
Microchip MCU
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