Datasheet USB1T11AMX, USB1T11AMTCX, USB1T11AMTC, USB1T11AM Datasheet (Fairchild Semiconductor)

USB1T11A
Universal Serial Bus Transceiver

USB1T11A Universal Serial Bus Transceiver

November 1999
Revised December 1999

General 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 interfac e with the physical layer of the Univ e r­sal Serial Bus. It is c apable of transmitting an d 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 Inter face Engine”. Implementation of the
Serial Interface Engine along with the USB1T11A allows
the designer to make USB c omp atib l e de vices wi t h off-th e­shelf logic and easily modify and update the application.

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 > 4000 V

Ordering Code:

Order Number Package Number Package Description

USB1T11AM M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow
USB1T1 1AMTC MTC14 14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.

Connection Diagram Logic Diagram

© 1999 Fairchild Semiconductor Corporation DS500234 www.fairchildsemi.com

Pin Descriptions

Pin Name I/O Description

RCV O Receive data. CMOS level output for USB differential input

USB1T11A

OE# I

MODE I

, VMO/F

V

PO

SEO

V

, V

P

M

D+, D− AI/O Data+, Data−. Differential data bus conforming to the Universal Serial Bus standard.

SUSPND I

SPEED I

V

CC

GND Ground reference

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
VMO/FSEO pin takes the function of FSEO (Force SEO).

Inputs to differential driver. (Outputs from SIE).

MODE VPO VMO/FSEO RESULT

0 0 0 Logic “0”

01 SE0#

I

1 0 Logic “1”
1 1 SEO#

10 0 SE0#

0 1 Logic “0”
1 0 Logic “1”
1 1 Illegal code

Gated version of D− and D+. Outputs are logic “0” and logic “1”. Used to detect single ended
zero (SE0#), error conditions, and interconnect speed. (Input to SIE).

VP VM RESULT

O

0 0 SE0#
0 1 Low Speed
1 0 Full Speed
11Error

Suspend. Enables a low power state while the USB bus is inactive. While the suspend pin is
active it will drive 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”.

3.0V to 3.6V power supply

and in this GND, the

CC

Functional Truth Table

Input I/O Outputs

Mode VPO VMO/FSEO OE SUSPND D+ D− RCV

V

0 0 0 0 0 0 1 0 0 1 Logic 0
0 0 1 0 0 0 0 U 0 0 SEO#
0 1 0 0 0 1 0 1 1 0 Logic 1
0 1 1 0 0 0 0 U 0 0 SEO#
1 0 0 0 0 0 0 U 0 0 SEO#
1 0 1 0 0 0 1 0 0 1 Logic 0
1 1 0 0 0 1 0 1 1 0 Logic 1
1 1 1 0 0 1 1 U U U Illegal Code
X X X 1 0 ZZUUUD+/D− Hi-Z
X X X 1 1 ZZUUUD+/D− Hi-Z

X = Don’t Care
Z = 3-STATE
U = Undefined State

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V

P

M

Result

Absolute Maximum Ratings(Note 1) Recommended Operating

DC Supply Voltage (VCC) −0.5V to +7.0V
DC Input Diode Current (I

V

< 0 −50 mA

I

Input Voltage (V

)

I

)

IK

(Note 2) −0.5V to +5.5V
Input Voltage (V
Output Diode Current (I

V

> VCC or VO < 0 ±50 mA

O

Output Voltage (V

(Note 2) −0.5V to V
Output Source or Sink Current (I

) −0.5V to VCC + 0.5V

I/O

)

OK

)

O

)

O

CC

+ 0.5V

VP.VM, RCV pins

V

= 0 to V

O

CC

Output Source or Sink Current (I

)

O

±15 mA

D+/D− pins

= 0 to V

V

O

V

CC

CC

or GND Current (ICC, I

Storage Temperature (T

) ±100 mA

GND

) −60°C to + 150°C

STO

±50 mA

Conditions

Supply Voltage V
Input Voltage (V
Input Range for AI/O (V
Output Voltage (VO)0V to V
Operating Ambient Temperature

in free air (T

Note 1: The Absolute Maxi mum Ratings are thos e values beyond which
the safety of the d evice cannot b e guaranteed . The device sh ould not be
operated at these limit s. The parametric values defi ned in the Electrical
Characteristic tables are not guaranteed at the absolute maximum rating.
The “Recomm ended O peratin g Cond itions ” table will defin e the condition s
for actual device operation.

Note 2: The input and output voltage ratings may be exceeded if the input
and output clamp current ratings are observed.

CC

) 0V to 5.5V

I

amb

)0V to V

AI/O

) −40°C to +85°C

DC Electrical Characteristics (Digital Pins)

Over recommended range of supply voltage and operating free air temperature (unless otherwise noted). VCC = 3.0V to 3.6V

Symbol Parameter Test Conditions

Min Typ Max

CC

V
V

V

V

I

L

I

CCFS

I

CCLS

I

CCQ

I

CCS

INPUT LEVELS:

IL
IH

OL

OH

LOW Level Input Voltage 0.8 V
HIGH Level Input Voltage 2.0 V
OUTPUT LEVELS:
LOW Level Output Voltage IOL = 4 mA 0.4

HIGH Level Output Voltage IOH = 4 mA 2.4

LEAKAGE CURRENT:
Input Leakage Current VCC = 3.0 to 3.6 ±5 µA
Supply Current (Full Speed) VCC = 3.0 to 3.6 5 mA
Supply Current (Low Speed) VCC = 3.0 to 3.6 5 mA
Quiescent Current VCC = 3.0 to 3.6

Supply Current in Suspend VCC = 3.0 to 3.6; Mode = V

IOL = 20 µA0.1

= 20 µAV

I

OH

VIN = VCC or GND

CC

Limits

– 0.1

USB1T11A

3.0V to 3.6V

CC
CC

UnitTemp = −40°C to +85°C

V

V

5mA

10 µA

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DC Electrical Characteristics (D+/D− Pins)

Over recommended range of supply voltage and operating free air temperature (unless otherwise noted). VCC = 3.0V to 3.6V

Symbol Parameter Test Conditions

USB1T11A

Min Typ Max

INPUT LEVELS:

V

DI

V

CM

V

SE

Differential Input Sensitivity |(D+) – (D−)| 0.2 V
Differential Common Mode Range Includes VDI Range 0.8 2.5 V
Single Ended Receiver Threshold 0.8 2.0 V
OUTPUT LEVELS:

V

OL

V

OH

V

CR

Static Output LOW Voltage RL of 1.5 kΩ to 3.6V 0.3 V
Static Output HIGH Voltage RL of 15 kΩ to GND 2.8 3.6 V
Differential Crossover 1.3 2.0 V
LEAKAGE CURRENT:

I

OZ

High Z State Data Line Leakage Current 0V < VIN < 3.3V ±5 µA
CAPACITANCE:

CIN(Note 4) Transceiver Capacitance Pin to GND 10 pF

Capacitance Match 10 %
OUTPUT RESISTANCE:

Z

(Note 3) Driver Output Resistance Steady State Drive 4 20 Ω

DRV

Resistance Match 10 %

Note 3: Excludes external resistor. In order to comply with USB Specification 1.1, external series resistors of 24Ω ± 1% ea ch on D+ and D− are recom-
mended. This spec if ication is guarante ed by design and statis ti c al process distributio n.

Note 4: This specification is gu aranteed by design and statistical proces s distribution.

Limits

AC Electrical Characteristics (D+/D− Pins, Full Speed)

Over recommended range of supply voltage and operating free air temperature (unless otherwise noted). VCC = 3.0V to 3.6V
CL = 50 pF; RL = 1.5 kΩ on D+ to V

Symbol Parameter Test Condition

DRIVER CHARACTERISTICS:

t
t
V

R
F
RFM

CRS

Rise Time Figure 1 4 20
Fall Time Figure 1 4 20
Rise/Fall Time Matching (tr/tf)90110%
Output Signal Crossover Voltage 1.3 2.0 V
DRIVER TIMINGS:

t

PLH

t

PLH

t

PHZ

t

PLZ

t

PZH

t

PZL

Driver Propagation Delay Figure 2 18 ns
(VPO, VMO/FSEO to D+/D−) Figure 2 18ns
Driver Disable Delay Figure 4 13 ns
(OE# to D+/D−) Figure 4 13ns
Driver Enable Delay Figure 4 17 ns
(OE# to D+/D−) Figure 4 17ns
RECEIVER TIMINGS:

t

PLH

t

PHL

t

PLH

t

PHL

Receiver Propagation Delay Figure 3 16 ns
(D+, D− to RCV) Figure 3 19 ns
Single-ended Receiver Delay Figure 3 8 ns
(D+, D− to VP, VM) Figure 3 8 ns

CC

Limits

Min Typ Max

10% and 90%

UnitsTemp = −40°C to +85°C

UnitsTemp = −40°C to +85°C

nst

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AC Electrical Characteristics (D+/D− Pins, Low Speed)

Over recommended range of supply voltage and operating free air temperature (unless otherwise noted). VCC = 3.0V to 3.6V
CL = 200 to 600 pF; RL = 1.5k on D− to V

Symbol Parameter Test Conditions

DRIVER CHARACTERISTICS:

CC

Limits

T

= −40°C to +85°C

amb

Min Typ Max

USB1T11A

Unit

t
t
V

t
t
t
t
t
t

t
t
t
t

LR
LF
RFM

CRS

PLH
PHL
PHZ
PLZ
PZH
PZL

PLH
PHL
PLH
PHL

10% and 90%

Rise Time Figure 1 75 300

nst
Fall Time Figure 1 75 300
Rise/Fall Time Matching (tr/tf)80120%
Output Signal Crossover Voltage 1.3 2.0 V
DRIVER TIMINGS:
Driver Propagation Delay Figure 2 300 ns
(VPO, VMO/FSEO to D+/D−) Figure 2 300 ns
Driver Disable Delay Figure 4 13 ns
(OE# to D+/D−) Figure 4 13ns
Driver Enable Delay Figure 4 205 ns
(OE# to D+/D−) Figure 4 205 ns
RECEIVER TIMINGS:
Receiver Propagation Delay Figure 3 18 ns
(D+, D− to RCV) Figure 3 18 ns
Single-ended Receiver Delay Figure 3 28 ns
(D+, D− to VP, VM) Figure 3 28 ns

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AC Waveforms

VOL and VOH are the typical output voltage drops that occur with the output load. (VCC never goes below 3.0V)

USB1T11A

FIGURE 1. Rise and Fall Times

FIGURE 2. VPI, VMO/FSEO to D+/D−

FIGURE 3. D+/D− to RCV, VP/VM

Test Circuits and Waveforms

Load for VM/VP and RCV

CL = 50 pF, Full Speed
CL = 50 pFm Low Speed (Min Timing)
CL = 350 pF, Low Speed (Max Timing)

1.5 kΩ on D− (Low Speed) or D+ (Full Speed) only

Note:

V = 0 for t
V = VCC for t

Load for D+/D−

FIGURE 4. OE# to D+/D−

Load for Enable and Disable Times

, t

PZH

PHZ

, t

PZL

PLZ

Test S1

D−/LS Close
D+/LS Open
D−/FS Open
D+/FS Close

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Physical Dimensions inches (millimeters) unless otherwise noted

USB1T11A

14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow

Package Number M14A

7 www.fairchildsemi.com

Physical Dimensions inches (millimeters) unless otherwise noted (Continued)

USB1T1 1A Universal Serial Bus T ransceiver

14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

Fairchild does not assume any responsibility for use of any circuitr y described, no circuit patent licenses are implied a nd
Fairchild reserves the right at any time without notice to change said circuitry and specifications.

LIFE SUPPORT POLICY

FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:

1. Life support devices or systems a re devices or syste ms
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided in the labeling, can be rea­sonably expected to result in a significant inju ry to the
user.

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Package Number MTC14

2. A critical component in any com ponen t of a life su pport
device or system whose failu re to perform can be rea­sonably expected to cause the failure of the li fe su pp ort
device or system, or to affect its safety or effectiveness.

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