33879 Datasheet, PDF (3/24 Pages) Freescale Semiconductor, Inc – Configurable Octal Serial Switch with Open Load Detect Current Disable

INTERNAL BLOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
V_DD
__
CS
SCLK
DI
DO
EN
IN5
IN6
EP
~50 µA
~110 kΩ
~50 µA
~50 µA
SPI and
Interface
Logic
SPI Bit 0
Enable
SPI Bit 4
IN5
Exposed Pad
V_PWR
Internal
Bias
Power Supply
Charge
Pump
Overvoltage
Shutdown/POR
Sleep State
GND
OV, POR, SLEEP
Typical of all 8 output drivers
TLIM
Gate
Drive
Control
Current
Limit
+
–
+
–
Open / Short
Comparator
Open
Load
Detect
Current
~80 µA
+–
~4.0 V Open/Short
Threshold
D1
D2
D3 Drain
D4 Outputs
D7
D8
S1
S2
S3 _Source
S4 _Outputs
S7
S8
TLIM
Gate
Drive
Control
Current
Limit
+
–
+
–
Open / Short
Comparator
D5 Drain
Open
Load
D6 ^Outputs
Detect
Current
~80 µA
+–
~4.0 V Open/Short
Threshold
S5 _Source
S6 Outputs
Figure 2. 33879 Simplified Internal Block Diagram
Analog Integrated Circuit Device Data
Freescale Semiconductor
33879
3