The ISP1105/1106/1107 range of Universal Serial Bus (USB) transceivers are fully
compliant with the
portable electronics devices such as mobile phones, digital still cameras, Personal
Digital Assistants (PDA) and Information Appliances (IA).
They allow USB Application Specific ICs (ASICs) and Programmable Logic Devices
(PLDs) with power supply voltages from 1.65 V to 3.6 V to interface with the physical
layer of the Universal Serial Bus. They have an integrated 5 V to 3.3 V voltage
regulator for direct powering via the USB supply V
The ISP1105/1106/1107 range can be used as a USB device transceiver or a USB
host transceiver. They can transmit and receive serial data at both full-speed
(12 Mbit/s) and low-speed (1.5 Mbit/s) data rates.
ISP1105 allows single/differential input modes selectable by a MODE input and it is
available in HBCC16 package. ISP1106 allows only differential input mode and is
available in both TSSOP16 and HBCC16 packages. ISP1107 allows only
single-ended input mode and is available in both TSSOP16 and HBCC16 packages.
Universal Serial Bus Specification Rev. 1.1
.
BUS
. They are ideal for
2.Features
■ Complies with
■ Integrated bypassable 5 V to 3.3 V voltage regulator for powering via USB V
■ V
■ Used as a USB device transceiver or a USB host transceiver
■ Supports full-speed (12 Mbit/s) and low-speed (1.5 Mbit/s) serial data rates
■ Stable RCV output during SE0 condition
■ Two single-ended receivers with hysteresis
■ Low-power operation
■ Supports an I/O voltage range from 1.65 V to 3.6 V
■ 4 kV on-chip ESD protection
■ Full industrial operating temperature range −40 to +85 °C
■ Available in small TSSOP16 (except ISP1105) and HBCC16 packages.
TSSOP16plastic thin shrink small outline package; 16 leads; body width 4.4 mmSOT403-1
ISP1105/1106/1107
Advanced USB transceivers
[1] The ground terminal of ISP1105W is connected to the exposed diepad (heatsink).
4.1 Ordering options
Table 2:Selection guide
ProductPackage(s)Description
ISP1105HBCC16Supports both single-ended and differential input modes
ISP1106TSSOP16 or HBCC16Supports only the differential input mode
ISP1107TSSOP16 or HBCC16Supports only the single-ended input mode
[1] Refer to Table 5 and Table 6.
[2] Refer to Table 6.
[3] Refer to Table 5.
(1) Use a 39 Ω resistor (1%) for a USB v2.0 compliant output impedance range.
(2) Connect to D− for low-speed operation.
(3) Pin function depends on device type see Section 7.2.
(4) Only for ISP1105.
Fig 1. Functional diagram (combined ISP1105, ISP1106 and ISP1107).
131315-Internalregulator option: regulated supply voltage output
…continued
ISP1106/7
HBCC16
ISP1106/7
TSSOP16
(3.0 to 3.6 V) during 5 V operation; a decoupling capacitor
of at least 0.1 µF is required
Regulator bypass option: used as a supply voltage input
for 3.3 V operation. (3.3 V ±10%)
V
CC(5.0)
141416-Internal regulator option: supply voltage input
(4.0 to 5.5 V); can be connected directly to USB supply
V
BUS
V
pu(3.3)
Regulator bypass option: connect to V
15151-pull-up supply voltage (3.3 V ±10%); connect an external
reg(3.3)
1.5 kΩ resistor on D+ (full-speed) or D− (low-speed); pin
function is controlled by input SOFTCON:
SOFTCON = LOW — V
floating (high impedance);
pu(3.3)
ensures zero pull-up current
SOFTCON = HIGH — V
to V
reg(3.3)
= 3.3 V;internally connected
pu(3.3)
SOFTCON16162Isoftware controlled USB connection input; a HIGH level
applies 3.3 V to pin V
, which is connected to an
pu(3.3)
external 1.5 kΩ pull-up resistor; this allows USB
connect/disconnect signalling to be controlled by software
[1] Symbol names with an overscore (e.g. NAME) indicate active LOW signals.
[2] Down bonded to the exposed diepad.
7.Functional description
7.1 Function selection
Table 4:Function table
SUSPNDOE(D+, D−)RCVVP/VMFunction
LLdriving &
receiving
LHreceiving
HLdrivinginactive
HHhigh-Z
[1] Signal levels on (D+, D−) are determined by other USB devices and external pull-up/down resistors.
[2] In ‘suspend’ mode (SUSPND = HIGH) the differential receiver is inactive and output RCV is always
LOW. Out-of-suspend (‘K’) signalling is detected via the single-ended receivers VP and VM.
[3] During suspend, the slew-rate control circuit of low-speed operation is disabled. The (D+, D−) lines
are still driven to their intended states, without slew-rate control. This is permitted because driving
during suspend is used to signal remote wake-up by driving a ‘K’ signal (one transition from idle to
‘K’ state) for a period of 1 to 15 ms.
Table 5:Driving function using single-ended input data interface (OE = L) [for
ISP1105/1106/1107
Advanced USB transceivers
ISP1107 and ISP1105 (MODE = L)]
FSE0VOData
LLdifferential logic 0
LHdifferential logic 1
HLSE0
HHSE0
Table 6:Driving function using differential input data interface (
and ISP1105 (MODE = H)]
VMOVPOData
LLSE0
LHdifferential logic 1
HLdifferential logic 0
HHillegal state
Table 7:Receiving function (
(D+, D−)RCVVP
differential logic 0LLH
differential logic 1HHL
SE0RCV*
[1] VP = VM = H indicates the sharing mode (V
[2] RCV* denotes the signal level on output RCV just before SE0 state occurs. This level is stable during
the SE0 period.
OE=H)
[2]
CC(5.0)/Vreg(3.3)
is disconnected).
OE = L) [for ISP1106
[1]
LL
7.3 Power supply configurations
The ISP1105/1106/1107 can be used with different power supply configurations,
which can be changed dynamically. An overview is given in Table 9.
VM
[1]
Normal mode — Both V
For 5 V operation, V
CC(5.0)
CC(I/O)
and V
CC(5.0)
or (V
CC(5.0)
and V
) are connected.
reg(3.3)
is connected to a 5 V source (4.0 to 5.5 V). The internal
voltage regulator then produces 3.3 V for the USB connections. For 3.3 V operation,
both V
CC(5.0)
and V
are connected to a 3.3 V source (3.0 to 3.6 V). V
reg(3.3)
CC(I/O)
is
independently connected to a voltage source (1.65 V to 3.6 V), depending on the
supply voltage of the external circuit.
Disable mode — V
is not connected, V
CC(I/O)
CC(5.0)
or (V
CC(5.0)
and V
reg(3.3)
) are
connected. In this mode, the internal circuits of the ISP1105/1106/1107 ensure that
the (D+, D−) pins are in three-state and the power consumption drops to the
low-power (suspended) state level. Some hysteresis is built into the detection of
V
Sharing mode — V
CC(I/O)
lost.
is connected, (V
CC(I/O)
CC(5.0)
and V
) are not connected. In
reg(3.3)
this mode, the (D+,D−) pins are made three-state and the ISP1105/1106/1107 allows
external signals of up to 3.6 V to share the (D+, D−) lines. The internal circuits of the
ISP1105/1106/1107 ensure that virtually no current (maximum 10 µA) is drawn via
the (D+, D−) lines. The power consumption through pin V
low-power (suspended) state level. Both the VP and VM pins are driven HIGH to
indicate this mode. Pin RCV is made LOW. Some hysteresis is built into the detection
of V