XRT8001 データシートの表示（PDF） - Exar Corporation
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XRT8001 Datasheet PDF : 48 Pages
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ABSOLUTE MAXIMUM RATINGS
Supply Range ................................................ 7V
Voltage at any Pin ........... GND -0.3V to Vcc+0.3V
Operating Temperature................. - 40°C to +85°C
Storage Temperature ................... - 40°C to +85°C
Package Dissipation ............................... 500mW
XRT8001
DC ELECTRICAL CHARACTERISTICS (Except Microprocessor Serial Interface)1
Symbol
Parameter
Min. Typ. Max. Units
Condition
VIL
Input Low Level
0.8 V
VIH
Input High Level
2.0
V
VOL Output Low Level (CLK1, CLK2)
0.4 V
IOL = -6.0mA
VOH Output High Level (CLK1, CLK2)
2.4
V
IOL = 6.0mA
VOL Output Low Level (LOCKDET, SYNC)
0.4 V
IOL = -3.0mA
VOH Output High Level (LOCKDET, SYNC) 2.4
V
IOL = 3.0mA
IIL
Input Low Current (CSB, MSB)
-150 mA
IIH
Input High Current (CSB, MSB)
10 mA
VIN = VCC
IIL
Input Low Current (except CSB, MSB) -10
mA
IIH
Input High Current (except CSB, MSB)
10 mA
VIN = VCC
ICC
Operating Current
11
30
mA
3.3V, No Load, CLk1, CLK2 = 8 x 2.048MHz
20
35
mA
5V, No Load, CLk1, CLK2 = 8 x 2.048MHz
RIN Internal Pull-up Resistance (CSB, MSB) 50 100 150 kW
Note:
1. 5V tolerant input considerations when operating from 3.3V:
When the XRT8001 is powered at 3.3V, it can tolerate 5V-level signals via its inputs. However, the user should be aware the XRT8001
contains a “Factory-Test” Mode. This mode is enabled whenever the MSB (Master-Slave select) input pin is pulled to about 2V above
VDD.
Therefore, if the user is powering the XRT8001 at 3.3V but is applying a 5.25V signal to the MSB input pin, then it is possible that the
XRT8001 could be configured to operate in this “Factory-Test” Mode. Since all “Factory-Test” Mode registers are reset to “0”, upon
chip power, this should not be a problem for the user.
However, if the user performs write operations to “non-defined” address locations within the XRT8001, then the user may observe strange
operation from the XRT8001. The user must make sure that when the Microcontroller performs WRITE operations to the XRT8001, it
is only performing these WRITE operations to the Address Locations defined in the XRT8001 Data Sheet.
Rev. 1.01
5
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