UM232R Просмотр технического описания (PDF) - Future Technology
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UM232R Datasheet PDF : 19 Pages
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Table 9 - UART and CBUS I/O Pin Characteristics (VCCIO = 2.8V, Standard Drive Level)
Parameter Description
Min Typ Max Units
Voh
Output Voltage High
2.1
2.6
3.1
V
Vol
Output Voltage Low
0.3
0.4
0.5
V
Vin
Input Switching Threshold
1.0
1.2
1.5
V
VHys
Input Switching Hysteresis
20
25
30
mV
Conditions
I source = 1mA
I sink = 2mA
**
**
Page 11
Table 10 - UART and CBUS I/O Pin Characteristics (VCCIO = 5.0V, High Drive Level)
Parameter Description
Voh
Output Voltage High
Min Typ Max Units
3.2
4.1
4.9
V
Vol
Output Voltage Low
0.3
0.4
0.6
V
Vin
Input Switching Threshold
1.3
1.6
1.9
V
VHys
Input Switching Hysteresis
50
55
60
mV
Conditions
I source = 6mA
I sink = 6mA
**
**
Table 11 - UART and CBUS I/O Pin Characteristics (VCCIO = 3.3V, High Drive Level)
Parameter Description
Min Typ Max Units
Voh
Output Voltage High
2.2
2.8
3.2
V
Vol
Output Voltage Low
0.3
0.4
0.6
V
Vin
Input Switching Threshold
1.0
1.2
1.5
V
VHys
Input Switching Hysteresis
20
25
30
mV
Conditions
I source = 3mA
I sink = 8mA
**
**
Table 12 - UART and CBUS I/O Pin Characteristics (VCCIO = 2.8V, High Drive Level)
Parameter Description
Min Typ Max Units
Voh
Output Voltage High
2.1
2.8
3.2
V
Vol
Output Voltage Low
0.3
0.4
0.6
V
Vin
Input Switching Threshold
1.0
1.2
1.5
V
VHys
Input Switching Hysteresis
20
25
30
mV
Conditions
I source = 3mA
I sink = 8mA
**
**
**Inputs have an internal 200kΩ pull-up resistor to VCCIO.
Table 13 - RESET# and TEST Pin Characteristics
Parameter Description
Vin
Input Switching Threshold
Min Typ Max Units Conditions
1.3
1.6
1.9
V
VHys
Input Switching Hysteresis
50
55
60
mV
Table 14 - USB I/O Pin (USBDP, USBDM) Characteristics
Parameter Description
Min
UVoh
I/O Pins Static Output ( High)
2.8
UVol
I/O Pins Static Output ( Low )
0
UVse
Single Ended Rx Threshold
0.8
UCom
Differential Common Mode
0.8
UVDif
Differential Input Sensitivity
0.2
UDrvZ
Driver Output Impedance
26
Typ
29
Max
3.6
0.3
2.0
2.5
44
Units
V
V
V
V
V
Ohms
Conditions
RI = 1.5kΩ to 3V3Out ( D+ )
RI = 15kΩ to GND ( D- )
RI = 1.5kΩ to 3V3Out ( D+ )
RI = 15kΩ to GND ( D- )
***
***Driver Output Impedance includes the internal USB series resistors on USBDP and USBDM pins.
UM232R USB-Serial UART Development Module Datasheet Version 1.02
© Future Technology Devices International Ltd. 2005
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