Datasheet

© Copyright 2009 Future Technology Devices International Ltd
16
Document Reference No.: FT_000202
UM245R USB - Parallel FIFO Development Module Datasheet Version 1.04
Clearance No.: FTDI# 124
Parameter
Description
Minimum
Typical
Maximu
m
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
***
Table 6.10 USB I/O Pin (USBDP, USBDM) Characteristics
*** Driver Output Impedance includes the internal USB series resistors on USBDP and USBDM pins
6.3 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 6.11 EEPROM Characteristics