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ELECTRICAL SPECIFICATIONS
*CAUTION*
This product incorporates numerous static-sensitive components.
Always wear an ESD wrist strap and observe proper ESD handling
procedures when working with this device. Failure to observe this
precaution may result in module damage or failure.
USBDP
USBDM
GND
DSR
DATA_IN
DATA_OUT
RTS
CTS
DTR
TX_IND
VCC
SUSP_IND
RX_IND
485_TX
RI
DCD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Figure 2: SDM-USB-QS-S Pinout (Top View)
ABSOLUTE MAXIMUM RATINGS
Supply Voltage VCC
-0.5
to
+6.0
VDC
Any Input or Output Pin
-0.5
to VCC + 0.5
VDC
Max Current Sourced By Outputs
24
mA
Operating Temperature
0
to
+70
°C
Storage Temperature
-65
to
+150
°C
Soldering Temperature
+225°C for 10 seconds
*NOTE* Exceeding any of the limits of this section may lead to permanent
damage to the device. Furthermore, extended operation at these maximum
ratings may reduce the life of this device.
Parameter
Designation
Min.
Typical
Max.
Units
Notes
POWER SUPPLY
Operating Voltage
VCC
4.35
5.0
5.25
VDC
–
Supply Current
ICC
–
26.0
28.0
mA
–
UART SECTION
Data Rate
–
0.0003
–
3.0
Mbps
–
Data Output:
Logic Low
VOL
0.3
0.4
0.6
VDC
–
Logic High
VOH
3.2
4.1
4.9
VDC
–
EEPROM Size
–
–
1,024
Bits
–
USB SECTION
Data Output:
Logic Low
UVOL
0.0
–
0.3
VDC
–
Logic High
UVOH
2.8
–
3.6
VDC
–
Single-Ended RX Threshold
UVSE
0.8
–
2.0
VDC
–
Differential Common Mode
UCOM
0.8
–
2.5
VDC
–
Differential Input Sensitivity
UVDIF
0.2
–
–
VDC
–
Driver Output Impedance
UDRVZ
29
–
44
Ω
–
ENVIRONMENTAL
Operating Temperature Range
–
0.0
–
+70
°C–
PIN ASSIGNMENTS
Pin #
Name
Description
1
USBDP
USB data signal plus
2
USBDM
USB data signal minus
3
GND
Ground supply
4
VCC
Positive power supply
5
SUSP_IND
Goes low during USB Suspend Mode. This pin can be used to
power down external logic when the host puts the USB bus
into suspend mode.
6
RX_IND
This line will pulse low when receiving data from the USB bus.
This allows for the connection of a LED indicator.
7
TX_IND
This line will pulse low when transmitting data on the USB
bus. This allows for the connection of a LED indicator.
8
485_TX
Transmit enable line for RS-485 applications
9
DTR
Data Terminal Ready control / handshake output
10
CTS
Clear To Send control / handshake input
11
RTS
Request To Send control / handshake output
12
DATA_OUT
Transmit asynchronous data output
13
DATA_IN
Receive asynchronous data input
14
DSR
Data Set Ready control / handshake input
15
DCD
Data Carrier Detect control / input
16
RI
Ring Indicator control input
PIN DESCRIPTIONS
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