Datasheet

LM75A_4 © NXP B.V. 2007. All rights reserved.
Product data sheet Rev. 04 — 10 July 2007 3 of 24
NXP Semiconductors
LM75A
Digital temperature sensor and thermal watchdog
5. Block diagram
6. Pinning information
6.1 Pinning
6.2 Pin description
Fig 1. Block diagram
LM75A
SDA
V
CC
SCLA0
OS
A1 GNDA2
002aad029
BIAS
REFERENCE
BAND GAP
TEMP SENSOR
OSCILLATOR
POWER-ON
RESET
11-BIT
SIGMA-DELTA
A-to-D
CONVERTER
POINTER
REGISTER
TIMER
COMPARATOR/
INTERRUPT
COUNTER
LOGIC CONTROL AND INTERFACE
CONFIGURATION
REGISTER
THYST
REGISTER
TOS
REGISTER
TEMPERATURE
REGISTER
Fig 2. Pin configuration for SO8 Fig 3. Pin configuration for TSSOP8
LM75AD
SDA V
CC
SCL A0
OS A1
GND A2
002aad027
1
2
3
4
6
5
8
7
LM75ADP
SDA V
CC
SCL A0
OS A1
GND A2
002aad028
1
2
3
4
6
5
8
7
Table 3. Pin description
Symbol Pin Description
SDA 1 Digital I/O. I
2
C-bus serial bidirectional data line; open-drain.
SCL 2 Digital input. I
2
C-bus serial clock input.
OS 3 Overtemp Shutdown output; open-drain.
GND 4 Ground. To be connected to the system ground.
A2 5 Digital input. User-defined address bit 2.