The ISP1103 is a single-chip generic Universal Serial Bus (USB) transceiver that is
fully compliant with the
USB Application Specific ICs (ASICs) and Programmable Logic Devices (PLDs) to
interface with the physical layer of the Universal Serial Bus. It supports transmitting
and receiving serial data at both full-speed (12 Mbit/s) and low-speed (1.5 Mbit/s)
data rates. It also supports the low-power single-ended input receiver interface in
‘suspend’ mode operation. The ISP1103 operates on a 3.3 V supply voltage.
The pin configuration conforms to the ‘Serial Interface Engine’ from the Universal
Serial Bus Implementers Forum (USB-IF). The ISP1103 allows for both the ‘USB-IF
Standard Data Interface’ and the ‘Philips Encoded Data Interface’. The ISP1103 is
fully pin compatible with the industry-standard Philips Semiconductors USB
transceiver PDIUSBP11A.
Universal Serial Bus Specification Rev. 1.1
. It allows 3.3 V
2.Features
■ Complies with
c
c
■ Supports full-speed (12 Mbit/s) and low-speed (1.5 Mbit/s) serial data rates
■ Slew-rate controlled differential data driver
■ Differential inputreceiver with wide common-mode range and very high data input
sensitivity
■ Stable RCV output during SE0 condition
■ Two single-ended receivers with hysteresis
■ Supports ‘Philips Encoded Data Interface’ and ‘USB-IF Standard Data Interface’
■ Low-power operation in ‘suspend’ mode
■ Operates on a 3.3 V supply voltage
■ Fully backward compatible with PDIUSBP11A
■ Compatible with VHDL ‘Serial Interface Engine’ from USB Implementers Forum
■ Higher than 8 kV ESD protection
■ Full industrial operating temperature range −40 to +85 °C
■ Available in SO14, SSOP14 and TSSOP14 packages.
Universal Serial Bus Specification Rev. 1.1
Philips Semiconductors
ISP1103
USB transceiver
3.Ordering information
Table 1:Ordering information
Type numberPackage
NameDescriptionVersion
ISP1103DSO14plastic small outline package; 14 leads; body width 3.9 mmSOT108-1
ISP1103DBSSOP14plastic shrink small outline package; 14 leads; body width 5.3 mmSOT337-1
ISP1103DHTSSOP14plastic thin shrink small outline package; 14 leads; body width 4.4 mmSOT402-1
Preliminary specificationRev. 01 — 4 October 19993 of 17
Philips Semiconductors
ISP1103
USB transceiver
Table 2:Pin description
SymbolPinType Description
D−10AI/Onegative USB data bus connection (analog, differential); for
D+11AI/Opositive USB data bus connection (analog, differential); for
VPO/VO12Idifferential driver data input (Schmitt trigger); see Table 4
VMO/FSE013Idifferential driver data input (Schmitt trigger); see Table 4
V
CC(3.3)
6.Functional description
6.1 Function selection
Table 3:Function table
SUSPNDOED+/D−RCVVP/VMFunction
LLdrivingactiveactivenormal driving
LHreceiving
HLdrivinginactive
HHhigh-Z
…continued
low-speed mode connect to pin V
full-speed mode connect to pin V
14-supply voltage (3.0 to 3.6 V)
[1]
activeactivereceiving
[2]
activedriving during ‘suspend’
[1]
inactive
[2]
activelow-power state
via a 1.5 kΩ resistor
CC(3.3)
via a 1.5 kΩ resistor
CC(3.3)
(differential receiver active)
(differential receiver inactive)
[1] Signal levels on D+/D− are determined by other USB devices and external pull-up/down resistors.
[2] In ‘suspend’ mode (SUSPND = H) the differential receiver is inactive and output RCV is always HIGH.
Out-of-suspend (‘K’) signalling is detected via the single-ended receivers VP and VM.
6.2 Operating functions
Table 4:Driving function (OE = L)
MODEInterface typeVPO/VOVMO/FSE0Data
LLdifferential logic 0
L
H
Philips Encoded
Data Interface
USB-IF Standard
Data Interface
Table 5:Receiving function (
D+/D−RCVVPVM
differential logic 0LLH
differential logic 1HHL
SE0RCV*LL
OE=H)
LHSE0
HLdifferential logic 1
HHSE0
LLSE0
LHdifferential logic 0
HLdifferential logic 1
HHillegal data
[1] RCV* denotes the signal level on output RCV just before SE0 state occurs. This level is kept stable
during the SE0 period.
9397 750 06329
Preliminary specificationRev. 01 — 4 October 19994 of 17
[1] D+ is the USB positive data pin; D− is the USB negative data pin.
[2] Includes external resistors of 22 Ω±1% or 24Ω±1% on both D+ and D−.
[3] This voltage is available at pin V
[4] In ‘suspend’ mode the minimum voltage is 2.9 V.
9397 750 06329
Preliminary specificationRev. 01 — 4 October 19996 of 17