Datasheet

© Copyright 2005-2011 Future Technology Devices International Ltd
12
Document Reference No.: FT_000051
UM232R USB - Serial UART Development Module
Datasheet Version 1.1
Clearance No.: FTDI# 125
6 FT232RL Device Characteristics and Ratings
6.1 Absolute Maximum Ratings
The absolute maximum ratings for the FT232R devices are as follows. These are in accordance with the
Absolute Maximum Rating System (IEC 60134). Exceeding these may cause permanent damage to the
device.
Parameter
Value
Unit
Storage Temperature
-65°C to 150°C
Degrees C
Floor Life (Out of Bag) At Factory Ambient
(30°C / 60% Relative Humidity)
168 Hours
(IPC/JEDEC J-STD-033A MSL Level 3
Compliant)*
Hours
Ambient Temperature (Power Applied)
-40°C to 85°C
Degrees C
VCC Supply Voltage
-0.5 to +6.00
V
D.C. Input Voltage – USBDP and USBDM
-0.5 to +3.8
V
D.C. Input Voltage – High Impedance
Bidirectionals
-0.5 to + (VCC +0.5)
V
D.C. Input Voltage – All Other Inputs
-0.5 to + (VCC +0.5)
V
D.C. Output Current – Outputs
24
mA
D.C. Output Current – Low Impedance
Bidirectionals
24
mA
Power Dissipation (VCC = 5.25V)
500
mW
Table 6.1 Absolute Maximum Ratings
* If devices are stored out of the packaging beyond this time limit the devices should be baked before use.
The devices should be ramped up to a temperature of 125°C and baked for up to 17 hours.
6.2 DC Characteristics
DC Characteristics (Ambient Temperature = -40 to 85°C)
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
VCC1
VCC Operating Supply Voltage
4.0
---
5.25
V
VCC2
VCCIO Operating Supply
Voltage
1.8
---
5.25
V
Icc1
Operating Supply Current
---
15
---
mA
Normal Operation
Icc2
Operating Supply Current
50
70
100
μA
USB Suspend
Table 6.2 Operating Voltage and Current
Because the UM232R module does not provide access to the OSCI and OSCO pins, the VCC range of this
module has a minimum value of +4.0V. The FT232R device on this module is capable of operating down to
+3.3V but its internal oscillator is only specified for operation down to +4.0V and so an external crystal
must be used when VCC is in the range +3.3V to +4.0V.