Datasheet

Copyright © 2009 Future Technology Devices International Limited 20
Document No.: FT_000053
FT232R USB UART IC Datasheet Version 2.02
Clearance No.: FTDI# 38
Parameter Description Minimum Typical Maximum Units Conditions
UVoh
I/O Pins Static Output
(High)
2.8 3.6 V
RI = 1.5kΩ to
3V3OUT (D+) RI =
15KΩ to GND (D-)
UVol
I/O Pins Static Output
(Low)
0 0.3 V
RI = 1.5kΩ to
3V3OUT (D+) RI =
15kΩ to GND (D-)
UVse
Single Ended Rx
Threshold
0.8 2.0 V
UCom
Differential Common
Mode
0.8 2.5 V
UVDif
Differential Input
Sensitivity
0.2 V
UDrvZ
Driver Output
Impedance
26 29 44 Ohms See Note 1
Table 5.12 USB I/O Pin (USBDP, USBDM) Characteristics
5.3 EEPROM Reliability Characteristics
The internal 1024 Bit EEPROM has the following reliability characteristics:
Parameter Value Unit
Data Retention 15 Years
Read / Write Cycle 100,000 Cycles
Table 5.13 EEPROM Characteristics
5.4 Internal Clock Characteristics
The internal Clock Oscillator has the following characteristics:
Parameter
Value
Unit
Minimum Typical Maximum
Frequency of Operation
(see Note 1)
11.98 12.00 12.02 MHz
Clock Period 83.19 83.33 83.47 ns
Duty Cycle 45 50 55 %
Table 5.14 Internal Clock Characteristics
Note 1: Equivalent to +/-1667ppm