mc33291dw/r2 Freescale Semiconductor, Inc, mc33291dw/r2 Datasheet - Page 3

• Manufacturer Part Number: mc33291dw/r2
• Description: Eight-output Switch With Serial Peripheral Interface I/o
• Manufacturer: Freescale Semiconductor, Inc

Table 2. Pin Definitions
Analog Integrated Circuit Device Data
Freescale Semiconductor
5 – 8, 17 – 20
Pin
10
11
12
13
14
15
16
21
22
23
24
1
2
3
4
9
Pin Name
V
SCLK
SFPD
GND
V
OP7
OP6
OP5
OP4
OP3
OP2
RST
OP1
OP0
PWR
SO
CS
SI
DD
Gate Drive Supply
Output MOSFET
Protect Disable
Formal Name
System Clock
Serial Output
Logic Supply
Serial Input
Chip Select
Short Fault
Output 7
Output 6
Output 5
Output 4
Output 3
Output 2
Output 1
Output 0
Ground
Reset
Figure 3. 33291 Pin Connections
SCLK
GND
GND
GND
GND
OP7
OP6
OP5
OP4
SO
PIN CONNECTIONS
CS
SI
Connection to drain of output MOSFET number seven.
Connection to drain of output MOSFET number six.
Clocks the internal Shift registers of the 33291.
This pin is for the input of serial instruction data. SI information is read on the falling
edge of SCLK.
Connection to IC Power Ground and functions as part of heat sinking path.
Tri-stateable output from the Shift register.
Whenever this pin is in a logic low state, data can be transferred from the MCU to the
33291 through the SI pin and from the 33291 to the MCU through the SO pin.
Connection to drain of output MOSFET number five.
Connection to drain of output MOSFET number four.
Connection to drain of output MOSFET number three.
Connection to drain of output MOSFET number two.
This pin is used to prevent the outputs from latching-OFF because of an overcurrent
condition.
Plus supply for logic.
Main power supply.
This pin is active low. It is used to clear the SPI Shift register, thereby setting all
output switches OFF
Connection to drain of output MOSFET number one.
Connection to drain of output MOSFET number zero.
2
3
4
5
6
7
8
9
10
11
12
1
.
24
23
22
21
20
19
18
17
16
15
14
13
OP0
OP1
RST
VPWR
GND
GND
GND
GND
VDD
SFPD
OP2
OP3
Definition
PIN CONNECTIONS
33291
3