HT45B0K Holtek Semiconductor, HT45B0K Datasheet - Page 2

• Manufacturer Part Number: HT45B0K
• Description: SPI to USB Bridge
• Manufacturer: Holtek Semiconductor

Pin Assignment
Pin Description
Absolute Maximum Ratings
Rev 1.00
SDI
SDO
SCK
CLKI
V33O
UDP
UDN
VDD
VSS
NC
Pin Name
Note :
Supply Voltage....................................................................................................V
Input Voltage.......................................................................................................V
Storage Temperature.................................................................................................−50°C to +150°C
Operating Temperature.................................................................................................−40°C to +85°C
I
I
Total Power Dissipation..............................................................................................................10mW
These are stress ratings only. Stresses exceeding the range specifi ed under “Absolute Maximum
Ratings” may cause substantial damage to the device. Functional operation of this device at other
conditions beyond those listed in the specifi cation is not implied and prolonged exposure to extreme
conditions may affect device reliability.
OH
OL
Total.....................................................................................................................................−10mA
Total.......................................................................................................................................15mA
I/O
I/O
I/O
O
O
─
─
─
─
I
I
I
I
Serial I/O data input
SDI is high impedance when
Serial I/O data output.
SDO is high impedance when
Serial I/O clock input
SCK is high impedance when
Serial I/O Chip select input, low active
Connected to internal pull-high resistor.
External clock input
Interrupt output - CMOS output structure
Connected to the external interrupt input of MCU
A USB related interrupt will generate a low pulse signal on this line
3.3V regulator output
USBD+ line
USB function is controlled by software control register.
USBD- line
USB function is controlled by software control register.
Positive power supply
Negative power supply, ground
No connection
2
= HIGH
= HIGH
Descriptions
= HIGH
SPI to USB Bridge
SS
SS
HT45B0K
−0.3V to V
−0.3V to V
March 22, 2010
www.DataSheet4U.com
DD
SS
+6.0V
+0.3V