DA6505.005
11 June 2018
MAS6505 IN QFN-24 4x4x0.85 PACKAGE
Top Marking Information:
MAS6505 = Product Number
VVV = Product Version
YYWW = Year Week
XXXXX = Lot Number
QFN-24 4x4x0.85 PIN DESCRIPTION
Pin Name
Pin
Type
Function
Notes
SCK
SDI
1
2
DI
Serial bus clock input in I2C and SPI
DI/O
Data input/output in I2C
Data input in 4-wire SPI / Data input/output in 3-wire SPI
Bus mode select / chip select with pull-up
CSB=VDDIO: I2C mode / chip not selected
CSB=GND: SPI mode / chip selected
CSB
3
DI
1
VDDIO
VDD
4
5
P
P
Positive supply voltage for serial bus interface
2
3
Positive supply voltage
6-7
8
NC
G
GND
GNDS
NI
Supply ground
9
AO
AI
Sensor bridge supply ground
Negative sensor signal input
EEPROM test
10
11
12
13-20
21
22
23
24
ETEST
PI
AI/O
AI
4
3
Positive sensor signal input
NC
P
VDDS
TD
Supply voltage for sensor bridge and external sensing diode
External temperature sensing diode cathode connection
AI/O
NC
DO
5
3
6
SDO
Data output in 4-wire SPI mode
Test input/output in test mode
NC = Not Connected, P = Power, G = Ground, DO = Digital Output, DI = Digital Input, AO = Analog Output, AI = Analog Input
Note 1: In I2C mode the unused CSB pin must be left unconnected (floating). The CSB pin has internal 250 kΩ pull-up resistor to VDDIO.
To minimize current consumption the pin should be kept high (at VDDIO) except during chip select events of SPI bus communication mode.
Note 2: If there is no separate supply voltage available for the serial bus interface the VDDIO must be tied to VDD.
Note 3: The not connected (NC) pins should be connected to supply ground (GND) for minimum noise.
Note 4: The ETEST pin must be left unconnected (floating). It is only for EEPROM testing purpose.
Note 5: Optional external temperature sensing diode is connected between VDDS (anode) and TD (cathode). The unused TD pin is left
unconnected.
Note 6: In I2C and 3-wire SPI modes the unused SDO pin must be left unconnected (floating).
Note: On PCB the exposed pad is recommended to be connected to GND for minimum noise. It can be also left floating but it cannot be
connected to any other potential than GND.
41 (44)
MAS [ MICRO ANALOG SYSTEMS ]
