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S-5851A Series
www.sii-ic.com
© Seiko Instruments Inc., 2009-2010
2-WIRE DIGITAL TEMPERATURE SENSOR
Rev.2.1_00
S-5851A Series is a 2-wire serial I/O digital temperature sensor. This IC measures temperature with resolution of 0.0625°C
without external parts. This IC is ideal for wide-ranging temperature measurement for various applications.
A temperature sensor, a reference voltage generation circuit, a ΔΣ type A/D converter and interface bus are integrated in a
chip, and packages SNT-6A and SOT-23-6 available for this IC.
„ Features
Low voltage operation
Low current consumption
High accuracy
Temperature resolution
Digital output
Maximum operating frequency
Low power supply voltage detection circuit
Lead-free, Sn 100%, halogen-free*1
: VDD (min.) = 2.7 V
: 45 μA typ. (+25°C)
1 μA typ. (+25°C at shutdown)
: ±2.0°C (max.) 25°C to +85°C
±3.0°C (max.) 40°C to +125°C
: 0.0625°C
: 2-wire serial interface
: 400 kHz
*1. Refer to “„ Product Name Structure” for details.
„ Applications
Temperature monitor for power supply
Temperature monitor for battery
Air conditioning system
Various electronics devices
„ Packages
SNT-6A
SOT-23-6
Seiko Instruments Inc.
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2-WIRE DIGITAL TEMPERATURE SENSOR
S-5851A Series
„ Block Diagram
Temp
SCL Sensor
Control
Logic
SDA
VSS
ΔΣA/D
Converter
Serial
Interface
AD0
AD1 Oscillator
Register
VDD
Figure 1
Rev. 2.1_00
2 Seiko Instruments Inc.

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Rev. 2.1_00
2-WIRE DIGITAL TEMPERATURE SENSOR
S-5851A Series
„ Product Name Structure
1. Product name
(1) SNT-6A
S-5851AAA - I6T1
x
Environmental code
U : Lead-free (Sn 100%), halogen-free
G : Lead-free (for details, please contact our sales office)
Package name (abbreviated) and IC packing specification*1
I6T1 : SNT-6A, Tape
Product name
*1. Refer to the tape specification.
(2) SOT-23-6
S-5851AAA - M6T1 x
Environmental code
U : Lead-free (Sn 100%), halogen-free
S : Lead-free, halogen-free
Package name (abbreviated) and IC packing specification*1
M6T1 : SOT-23-6, Tape
Product name
*1. Refer to the tape specification.
2. Package
Package Name
SNT-6A
SOT-23-6
Package
PG006-A-P-SD
MP006-A-P-SD
Drawing Code
Tape
Reel
PG006-A-C-SD
PG006-A-R-SD
MP006-A-C-SD
MP006-A-R-SD
Land
PG006-A-L-SD
3. Product name list
Table 1
Product name
Package
S-5851AAA-I6T1x
SNT-6A
S-5851AAA-M6T1y
SOT-23-6
Remark 1. x: G or U
y: S or U
2. Please select products of environmental code = U for Sn 100%, halogen-free products.
Seiko Instruments Inc.
3