參數(shù)資料
型號(hào): FT232BM
廠商: Electronic Theatre Controls, Inc.
英文描述: Generation of FTDI’s Popular USB UART I.C.
中文描述: 在FTDI的流行的USB UART的新一代集成電路
文件頁(yè)數(shù): 11/24頁(yè)
文件大小: 812K
代理商: FT232BM
DS232B Version 1.1 Future Technology Devices Intl. Ltd. 2002
Page 11 of 24
FT232BM USB UART ( USB - Serial) I.C.
6.0 Absolute Maximum Ratings
These are the absolute maximum ratings for the FT232BM device i
n accordance with the Absolute Maximum Rating System
(IEC 60134).
Exceeding these may cause permanent damage to the device.
Storage Temperature ……………………………………………………. –65
o
C to + 150
o
C
Ambient Temperature ( Power Applied )……………………………….. 0
o
C to + 70
o
C
VCC Supply Voltage ……………………………………………….…….. -0.5v to +6.00v
DC Input Voltage - Inputs ……………………………………………….. -0.5v to VCC + 0.5v
DC Input Voltage - High Impedance Bidirectionals …………………… -0.5v to VCC + 0.5v
DC Output Current – Outputs …………………………………………… 24mA
DC Output Current – Low Impedance Bidirectionals …………………. 24mA
Power Dissipation ( VCC = 5.25v ) .……………………………………… 500mW
Electrostatic Discharge Voltage ( I < 1uA ) ……………………………… +/- 2000v
Latch Up Current ( Vi < 0 or Vi > Vcc ) ………………………………….. 100mA
6.1 D.C. Characteristics
DC Characteristics ( Ambient Temperature = 0 .. 70
o
C )
Operating Voltage and Current
Parameter
Description
Vcc1
VCC Operating Supply Voltage
Min
4.4
Typ
5.0
Max
5.25
Units
V
Conditions
Vcc2
VCCIO Operating Supply Voltage
3.0
-
5.25
V
Icc1
Icc2
Operating Supply Current
Operating Supply Current
-
-
25
180
-
mA
uA
Normal Operation
USB Suspend ** Note 1
200
Note 1 – Supply current excludes the 200uA nominal drawn by the external pull-up resistor on USB DP.
UART IO Pin Characteristics ( VCCIO = 5.0v )
Parameter
Description
Voh
Output Voltage High
Vol
Output Voltage Low
Vin
Input Switching Threshold
VHys
Input Switching Hysteresis
Min
4.4
0.1
1.1
Typ
-
-
1.5
200
Max
4.9
0.7
1.9
Units
V
V
V
mV
Conditions
I source = 2mA
I sink = 4 mA
Note 2
UART IO Pin Characteristics ( VCCIO = 3.3v )
Parameter
Description
Voh
Output Voltage High
Vol
Output Voltage Low
Vin
Input Switching Threshold
VHys
Input Switching Hysteresis
Min
2.7
0.1
1.0
Typ
-
-
1.4
200
Max
3.2
0.7
1.8
Units
V
V
V
mV
Conditions
I source = 2mA
I sink = 4 mA
Note 2
Note 2 – Inputs have an internal 200k pull-up resistor to VCCIO.
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