DS1620+ Dallas Semiconductor, DS1620+ Datasheet - Page 2

• Manufacturer Part Number: DS1620+
• Description: Digital Thermometer and Thermostat, -55 deg. to 125 deg C / 0.5 deg C, DIP-8
• Manufacturer: Dallas Semiconductor
• Type: Thermometersr

Specifications of DS1620+

• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

User–defined temperature settings are stored in nonvolatile memory, so parts can be programmed prior to
insertion in a system, as well as used in standalone applications without a CPU. Temperature settings and
temperature readings are all communicated to/from the DS1620 over a simple 3–wire interface.
ORDERING INFORMATION
DS1620
DS1620+
DS1620S
DS1620S+
DS1620S/T&R
DS1620S+T&R
Note: A “+” symbol will also be marked on the package near the Pin 1 indicator
DETAILED PIN DESCRIPTION Table 1
Table 2. DS1620 REGISTER SUMMARY
OPERATION-MEASURING TEMPERATURE
A block diagram of the DS1620 is shown in Figure 1.
. .
Temperature
(Read Only)
T
(Read/Write)
T
(Read/Write)
REGISTER NAME
PIN
H
L
(USER ACCESS)
1
2
3
4
5
6
7
8
PART
CLK/
SYMBOL
T
GND
T
T
V
RST
DQ
HIGH
COM
LOW
DD
CONV
PACKAGE MARKING
Data Input/Output pin for 3-wire communication port.
Clock input pin for 3-wire communication port. When the DS1620 is used in a
stand-alone application with no 3–wire port, this pin can be used as a convert
pin. Temperature conversion will begin on the falling edge of
Reset input pin for 3-wire communication port.
Ground pin.
High/Low Combination Trigger. Goes high when temperature exceeds TH;
will reset to low when temperature falls below TL.
Low Temperature Trigger. Goes high when temperature falls below TL.
High Temperature Trigger. Goes high when temperature exceeds TH.
Supply Voltage. 2.7V – 5.5V input power pin.
DS1620 (See Note)
DS1620 (See Note)
DS1620 (See Note)
9 Bits
9 Bits
9 Bits
SIZE
DS1620
DS1620
DS1620
MEMORY
EEPROM
EEPROM
SRAM
TYPE
2 of 12
Measured Temperature (Two’s Complement)
Power-Up/POR State: -60ºC (1 1000 1000)
Upper Alarm Trip Point (Two’s Complement)
Power-Up/POR State: User-Defined.
Initial State from Factory: +15°C (0 0001 1110)
Lower Alarm Trip Point (Two’s Complement)
Power-Up/POR State: User-Defined.
Initial State from Factory: +10°C (0 0001 0100)
8-Pin DIP (300 mil)
Lead-Free 8-Pin DIP (300 mil)
8-Pin SOIC (208 mil)
Lead-Free 8-Pin SOIC (208 mil)
8-Pin SOIC (208 mil), 2000-Piece Tape-and-Reel
Lead-Free 8-Pin SOIC (208 mil), 2000-Piece
Tape-and-Reel
DESCRIPTION
AND POWER-UP/POR STATE
REGISTER CONTENTS
DESCRIPTION
CONV
.