Fairchild Semiconductor USB1T11AMX, USB1T11AMTCX, USB1T11AMTC, USB1T11AM Datasheet

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

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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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