参数资料
型号: FT245RQ-REEL
厂商: FTDI, Future Technology Devices International Ltd
文件页数: 14/37页
文件大小: 0K
描述: IC USB TO PARALLEL FIFO 32-QFN
产品培训模块: USB Introduction
标准包装: 1
应用: USB 至 FIFO 控制器
接口: USB,FIFO,(同步/异步)
电源电压: 1.8 V ~ 5.25 V
封装/外壳: 32-VFQFN 裸露焊盘
供应商设备封装: 32-QFN 裸露焊盘(5x5)
包装: 标准包装
安装类型: 表面贴装
产品目录页面: 634 (CN2011-ZH PDF)
配用: 768-1020-ND - MOD USB PARALLEL FIFO DEV FT245R
其它名称: 768-1012-6
Copyright 2010 Future Technology Devices International Limited
21
Document No.: FT_000052
FT245R USB FIFO IC Datasheet Version 2.12
Clearance No.: FTDI# 39
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
UDrvZ
Driver Output
Impedance
26
29
44
Ohms
See Note 1
Table 5.12 USB I/O Pin (USBDP, USBDM) Characteristics
Note 1: Driver output impedance includes the internal USB series termination resistors on USBDP and
USBDM pins
6.1 EEPROM Reliability Characteristics
The internal 1024 Bit EEPROM has the following reliability characteristics:
Parameter
Value
Unit
Data Retention
10
Years
Read / Write Cycle
10,000
Cycles
Table 5.13 EEPROM Characteristics
6.2 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
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
Voh
Output Voltage High
2.1
2.8
3.2
V
I source =
3mA
Vol
Output Voltage Low
0.3
0.4
0.6
V
I sink = 8mA
Vin
Input Switching Threshold
1.0
1.2
1.5
V
Table 5.15 OSCI, OSCO Pin Characteristics – see Note 1
Note1: When supplied, the FT245R is configured to use its internal clock oscillator. These characteristics
only apply when an external oscillator or crystal is used.
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