Honeywell HumidIcon™ Digital
Humidity/Temperature Sensors

Datasheet
2
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What makes our sensors better?
• One sensor does the work of two!
• ±1.7 %RH Accuracy (humidity performance)
• ±0.6 °C Accuracy (BFSL) (temperature performance)
• -40 °C to 125 °C [-40 °F to 257 °F] Operating Temp. Range
• ±1.0 %RH Hysteresis
The series consists of packaging variations, offering customers the ability to
choose housing style (SIP 4-Pin or SOIC-8 SMD), filter (hydrophobic filter or
no filter), output (I2C or SPI), and packaging (tape and boxed, tape and reel, or
samples on tape).
Honeywell HumidIcon™
Digital Humidity/Temperature Sensors
Honeywell HumidIcon™ Digital Humidity/Temperature Sensors, HIH9000 Series, are digital output-type relative humidity (RH)
and temperature sensors combined in the same package. These sensors provide an accuracy level of .
• Industry-leadinglong-termstability • Truetemperature-compensateddigitalI2C or SPI output
• Industry-leadingreliability • Energyefficiency
• Lowesttotalcostsolution • Ultra-smallpackagesizeandoptions
• Otheraccuraciesavailable:±2.0%RH(HIH8000Series),±3.0%RH(HIH7000Series),±4.0%RH(HIH6100Series),
and ±4.5 %RH (HIH6000 Series)
 


Series* 




    
HIH9120-021-xxxx
digital 2.3Vdcto
5.5Vdc
SIP 4-pin without filter,
non-condensing

I2C100 to 249 units on tape
and boxed, 250 units or
more on tape and reel; or
5 sample pieces on tape
HIH9121-021-xxxx SIP 4-pin with filter,
condensation resistant I2C
HIH9130-021-xxxx SOIC-8 SMD without filter,
non-condensing I2C1000 pieces on tape and
reel; or 5 sample pieces
on tape
HIH9130-000-xxxx SOIC-8 SMD without filter,
non-condensing SPI
HIH9131-021-xxxx SOIC-8 SMD with filter,
condensation resistant I2C
1000 pieces on tape and
reel; or 5 sample pieces
on tape
HIH9131-000-xxxx SOIC-8 SMD with filter,
condensation resistant SPI
1000 pieces on tape and
reel; or 5 sample pieces
on tape
* See order guide on page 11 for complete catalog listings.

INDUSTRY-LEADING RELIAbILITY • ACCURACY • pACkAGING • LoNG-TERm STAbILITY
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±1.7
ACCURACY
%RH
Features
and Benefits
*Competitive Differentiator


Competitive humidity sensors require a 12 hour at 75 %RH rehydration process
(which requires special equipment chambers) to correct reflow temperature
offset. Honeywell’s sensor also experiences an offset after reflow; however, it only
requires a five-hour rehydration under ambient conditions (>50 %RH).
Honeywell’sindustry-leadinglong-termstability:
• Minimizessystemperformanceissues
• Helps by eliminating the need
to service or replace the sensor during its application life
•  the
sensor in the application, which can be inconvenient
and costly


Thermoset-polymer capacitive sensing element’s multilayer
construction provides  such as
condensation, dust, dirt, oils, and common environmental chemicals, which help
provide industry-leading reliability

Honeywell’s HumidIcon HIH9000 Series delivers the lowest total cost solution due
to the sensor’s 

Allows the RH measurement to be temperature compensated, and provides a
second, standalone temperature sensor output; allows the user to 


• Low supply voltage: Canoperatedownto2.3Vdc,whichallowsusein
 to enhance energy savings
and prolong system battery life
• Low power consumption: The sensor goes into  when not
taking a measurement within the application, consuming only 1 µA of power
versus 750 µA in full operation in a battery operated system; sleep mode helps
maximizebatterylife,reducespowersupplysize,andreducestheapplication’s
overall weight
Offers customers the lowest total cost solution.
One sensor does the work of two!
4
sensing.honeywell.com

High 14-bit humidity sensor resolution and 14-bit temperature sensor resolution
within the application help the user’s system 


2
Typically allows the customer to remove the components associated with signal
conditioning from the PCB to  and  associated with
those components (e.g., acquisition, inventory, assembly). True, temperature-
compensated digital I2C or SPI output often eliminates problems that could occur
from having multiple signal conditioning components across the PCB, as well as
simplifies integration to the microprocessor, eliminating the need for customer-
implemented, complex signal conditioning

SOIC-8SMD(SurfaceMountDevice)orSIP4Pin;ultra-smallsizeallowsfor
flexibility of use within the application,  on the PCB, and
typically  on crowded PCBs or in small devices; industry
standard design simplifies design-in

Available with hydrophobic filter and condensation-resistance, allowing for 
, or without hydrophobic filter, non-condensing

Allows for use in high volume, automated pick-and-place manufacturing,
 to the PCB and helping the customer to 


-40 °C to 125 °C [-40 °F to 257 °F] allows for use in many applications

Provides the ability to monitor whether the RH level has exceeded or fallen below
predetermined and critical levels within the application

Delivers flexibility within the application by lowering or eliminating the risk and cost
ofOEMcalibration

Free up PCB space. Reduce costs.
Choose options to best fit the application.
Features
and Benefits
*Competitive Differentiator
sensing.honeywell.com


May be used to provide precise RH and temperature measurement in air
conditioning/air movement systems, enthalpy sensing, thermostats, humidifiers/
dehumidifiers, and humidistats to maintain occupant comfort and ideal storage
humidity/temperature while achieving low energy consumption, supporting system
accuracyandwarrantyrequirements,maximizingsystemuptime,andimproving
overall system quality.

May be used to provide precise RH measurement in compressed air lines, allowing
the system to remove any condensation; dry compressed air is critical for customer
process control measurement.

May be used to provide precise RH and temperature measurement in ground-based
and airborne weather stations, allowing real time and highly accurate monitoring/
reporting of actual weather conditions.

May be used to provide precise RH and temperature measurement in the telecom
cabinetHVACsystem;maintainingpropertemperatureandhumiditylevelsinthe
cabinet provides maximum system uptime and performance.

May be used to provide optimal temperature and RH levels to support critical
processes and experiments, enhancing process efficiency with desired climate
conditions.


May be used to provide precise RH and temperature measurement in sleep
apnea machines and ventilators, enhancing patient comfort, safety and treatment
effectiveness with warm and humidified air.

May be used to provide optimal temperature and RH levels to support critical
processes and experiments, enhancing process efficiency with desired climate
conditions.
Potential Applications
6
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HIH9000 Series • 

     
Operating temperature range powered -40 [-40] – 125 [257] °C [°F]
Operating humidity range powered 0 – 100 %RH
Storage temperature range unpowered -40 [-40] – 125 [257] °C [°F]
Storage humidity range – 30 – 50 %RH
Solderingtemperature:
manual
automated
4 s reflow peak
30sreflowpeak
–
–
–
–
350[662]
260 [500]
°C [°F]
ESD MIL-STD883H,Method3015.7 – – ±4 kV
Latch-up immunity – – – ±100 m
Shock
MIL-STD202G,Method213D,TestConditionC,
half-sine,6ms±3perpendicularaxis,3shock
pulses per axis
– – 100 g
Vibration MIL-STD 202G, Method 204D, Test Condition D,
10Hzto2000Hz – – 20 g
Light sensitivity exposed to 50 lumens yellow light; exhibited no change in output
Reliability (MTTF) 9,312,507hr

     
Supply voltage variation effect
on humidity 2.3Vdcto5.5Vdc – 0.1 1.5 %RH/V
Compensated humidity range15 °C to 50 °C [41 °F to 122 °F] 10 – 90 %RH
Compensated temp. range1– 5 [41] – 50 [122] °C [°F]
Resolution 14 bit ADC resolution – – 0.04 %RH
Accuracy225 °C [77 °F] rising RH – ±1.7 – %RH
Maximal accuracy – – ±3.0 – %RH
Hysteresis – – ±1.0 – %RH
Total error band35 °C to 50 °C [41 °F to 122 °F],
20 %RH to 80 %RH – ±5.0 – %RH
Long term stability 50 %RH, 25 °C [77 °F], 5 years – ±0.05 ±1.2 %RH
Response time t63% – – 8 s
Impact of soldering IPC/EIA/JEDECJ-STD-020D,peaktemp.
of 260 °C [500 °F] – – ±2.5 %RH

1ConversionFormulas:
14bitADCoutputforhumidityto%RH: 14bitADCoutputfortemperatureconversionto°C:
Humidity (%RH) = Humidity_14_bit_ADC_output x 100
214 – 2 Temperature (C°) = Temperature_14_bit_ADC_output x 165 – 40
214 – 2
2 Accuracyisspecifiedatthetypicalsupplyvoltageof3.3Vdcandat25°C[77°F].Itisthemaximumdeviationfromtheidealtransferfunctionof
relative humidity measured over the compensated humidity range of 10 %RH to 90 %RH.
3 Total error band is the maximum deviation from the ideal transfer function of relative humidity over the compensated range of 5 °C [41 °F] to 50 °C
[122°F].Itincludesallerrorsduetohumiditynon-linearity,humidityhysteresis,humiditynon-repeatability,thermaleffectonzero,thermaleffecton
span and thermal hysteresis.
sensing.honeywell.com
Honeywell HumidIcon™ Digital Humidity/Temperature Sensors
T
     
Supply voltage variation effect
on temperature 2.3Vdcto5.5Vdc – 0.1 1.0 °C/V
Compensated temp. range – 5 [41] – 50 [122] °C [°F]
Resolution 14 bit ADC resolution – – 0.025 °C
Accuracy (BFSL)15 °C to 50 °C [41 °F to 122 °F] – ±0.6 – °C
Long term stability 25 °C for 5 years – – ±0.05 °C/yr
Response time t63% – – 30 s
Impact of soldering IPC/EIA/JEDECJ-STD-020D,peaktemp.
of 260 °C [500 °F] – – ±0.1 °C

1 Accuracy is specified over the compensated temperature range.

 DD     
Sleep current 3.3 ISLEEP – 0.6 1 µA
Supplycurrent:
I2C
SPI
3.3
3.3
IDD
IDD
14 bit fastest update, no sleep
14 bit fastest update, no sleep
0.65
0.75
1
1
mA
mA

      
Supply voltage VDD –2.3 3.3 5.5 Vdc
Low level output voltage VOL IOL = 2.8 mA min. – – 20 % VDD
High level output voltage VOH IOH = -2.8 mA min. 80 % – – VDD
Low level input voltage VIL – – – 20 % VDD
High level input voltage VIH – 80 % – – VDD
Pull-upresistor:
I2C
SPI (for SS only)
RP
RSS
–
–
–
–
2.2
10
–
–
kOhm
kOhm

      
Start-up time (power-on to
data ready) TSTA 14 bit TH and 14 bit humidity resolution – 50 60 ms
Updaterate applicationdependent:measurementsaretakenonlywhentheapplicationrequeststhem
8
sensing.honeywell.com
2
SDA
SCL
t
LOW
t
HDSTA
t
HDSTA
t
HIGH
t
HDDAT
t
SUSTA
t
SUSTO
t
BUS
t
SUDAT
     
SCL clock frequency FSCL 100 – 400 kHz
Start condition hold time relative to SCL edge tHDSTA 0.1 – – µs
Minimum SCL clock low width1 tLOW 0.6 – – µs
Minimum SCL clock high width1 tHIGH 0.6 – – µs
Start condition setup time relative to SCL edge tSUSTA 0.1 – – µs
Data hold time on SDA relative to SCL edge tHDDAT 0 – 0.5 µs
Data setup time on SDA relative to SCL edge tSUDAT 0.1 – – µs
Stop condition setup time on SCL tSUSTO 0.1 – – µs
Bus free time between stop and start condition tBUS 1 – – µs

1 Combined low and high widths must equal or exceed minimum SCL period.

t
BUS
t
CLKD
SCLK
MISO
SS
t
HIGH
t
SUSS
HiZHiZ
t
HDSS
t
LOW
t
CLKD
     
SCLK clock frequency fSCL 50 – 800 kHz
SS drop to first clock edge tHDSS 2.5 – – μs
Minimum SCLK clock low width1tLOW 0.6 – – μs
Minimum SCLK clock high width1tHIGH 0.6 – – μs
Clock edge to data transition tCLKD 0 – 0.5 μs
Rise of SS relative to last clock edge tSUSS 0.1 – – μs
Bus free time between rise and fall of SS tBUS 2 – – µs

1 Combined low and high widths must equal or exceed minimum SCLK period.
HIH9000 Series • 
9
sensing.honeywell.com
Honeywell HumidIcon™ Digital Humidity/Temperature Sensors

I2SPI
Digital Humidity/Temp.
Sensor
V
DD
V
CORE
V
SS
NC
SCL
SDA
AL_L
AL_H
V
SUPPLY
= 2.3 Vdc to 5.5 Vdc
GND
GND
12 V
0.1 µF
0.22 µF
2.2
kOhm
83
4
5
6
1
2
7
LED
2.2
kOhm
Digital Humidity/Temp.
Sensor
V
DD
V
CORE
V
SS
NC
SS
SCLK
MISO
AL_L
GND
0.1 µF
0.22 µF
10
kOhm
83
4
6
5
1
2
7
LED
V
SUPPLY
= 2.3 Vdc to 5.5 Vdc

 
4,90
[0.193]
3,90
[0.153]
1,905
[0.075]
1,27
[0.050]
0.41
[0.016]
1234
8765
6,0
[0.236]
0,15
[0.006]
0,203
[0.0080]
2,055
[0.081]
8X 0,61
[0.024]
8X 2,03
[0.08]
4X 4,9
[0.193]
6X 1,27
[0.05]
2 
     
1VCORE connect via 0.1 µF to ground 1 VCORE connect via 0.1 µF to ground
2VSS supply ground 2 VSS supply ground
3SCL I2C clock 3SS slave select (Input)
4 SDA I2C data 4 SCLK serial clock
51AL_H alarm output high 5 MISO master-in-slave-out
61AL_L alarm output low 61AL_L alarm output low
7 NC not connected externally 7 NC not connected externally
8VDD supply voltage, connect via 0.22 µF to ground 8 VDD supply voltage, connect via 0.22 µF to ground
1 Do not connect Pin(s) 5 and/or 6 if the built-in alarm feature is not desired. 1 Do not connect Pin 6 if the built-in alarm feature is not desired.

4,00
[0.157]
1,50
[0.059]
1,75
[0.069] 0,32
[0.013]
13
[0.51]
330
[13,0]
21,4
[0.84]
102
[4.0]
8,00
[0.315]
16,00
[0.630]
5,00
[0.197]
2,61
[0.103]

sensing.honeywell.com
HIH9000 Series • 

Digital Humidity/Temp.
Sensor
V
DD
V
SS
SCL
SDA
V
SUPPLY
= 2.3 Vdc to 5.5 Vdc
GND
0.22 µF
2.2
kOhm
13
42
2.2
kOhm

 
1234
8,9
[0.35]
1,20
[0.047]
PCB
1,2 - 2,0
[0.05 - 0.08]
4,90
[0.193]
3,90
[0.153]
5,0
[0.197]
1,27
[0.050]
0.41
[0.016]
0,063
[0.0025]
0,203
[0.0080]
1,905
[0.075]
1,27
[0.050]
1,05 DIA.
[0.040] 0,65 DIA.
[0.025]

4,00
[0.157]
1,50
[0.059]
1,75
[0.069] 0,32
[0.013]
13
[0.51]
330
[13,0]
21,4
[0.84]
102
[4.0]
8,00
[0.315]
16,00
[0.630]
5,00
[0.197]
2,61
[0.103]
1 For orders of 250 to 1000 units
  
1VDD connect via 0.22 µF to ground
2VSS supply ground
3SCL I2C clock
4 SDA I2C data

sensing.honeywell.com
Honeywell HumidIcon™ Digital Humidity/Temperature Sensors

 
HIH9120-021-0011HoneywellHumidIcon™DigitalHumidity/TemperatureSensors:HIH9000Series,I2C, ±1.7 %RH accuracy,
SIP 4 Pin, without filter, non-condensing, 100 units on tape
HIH9120-021-001S HoneywellHumidIcon™DigitalHumidity/TemperatureSensors:HIH9000Series,I2C, ±1.7 %RH accuracy,
SIP 4 Pin, without filter, non-condensing, five units on tape (sample)
HIH9121-021-0011HoneywellHumidIcon™DigitalHumidity/TemperatureSensors:HIH9000Series,I2C, ±1.7 %RH accuracy,
SIP 4 Pin, with filter, condensation-resistant, 100 units on tape
HIH9121-021-001S HoneywellHumidIcon™DigitalHumidity/TemperatureSensors:HIH9000Series,I2C, ±1.7 %RH accuracy,
SIP 4 Pin, with filter, condensation-resistant, five units on tape (sample)
HIH9130-000-001 HoneywellHumidIcon™DigitalHumidity/TemperatureSensors:HIH9000Series,SPI,±1.7%RHaccuracy,
SOIC-8 SMD, without filter, non-condensing, 1000 units on tape and reel
HIH9130-000-001S HoneywellHumidIcon™DigitalHumidity/TemperatureSensors:HIH9000Series,SPI,±1.7%RHaccuracy
SOIC-8 SMD, without filter, non-condensing, five units on tape (sample)
HIH9130-021-001 HoneywellHumidIcon™DigitalHumidity/TemperatureSensors:HIH9000Series,I2C, ±1.7 %RH accuracy,
SOIC-8 SMD, without filter, non-condensing, 1000 units on tape and reel
HIH9130-021-001S HoneywellHumidIcon™DigitalHumidity/TemperatureSensors:HIH9000Series,I2C, ±1.7 %RH accuracy,
SOIC-8 SMD, without filter, non-condensing, five units on tape (sample)
HIH9131-000-001 HoneywellHumidIcon™DigitalHumidity/TemperatureSensors:HIH9000Series,SPI,±1.7%RHaccuracy,
SOIC-8 SMD, with filter, condensation-resistant, 1000 units on tape and reel
HIH9131-000-001S HoneywellHumidIcon™DigitalHumidity/TemperatureSensors:HIH9000Series,SPI,±1.7%RHaccuracy,
SOIC-8 SMD, with filter, condensation-resistant, five units on tape (sample)
HIH9131-021-001 HoneywellHumidIcon™DigitalHumidity/TemperatureSensors:HIH9000Series,I2C, ±1.7 %RH accuracy,
SOIC-8 SMD, with filter, condensation-resistant, 1000 units on tape and reel
HIH9131-021-001S HoneywellHumidIcon™DigitalHumidity/TemperatureSensors:HIH9000Series,I2C, ±1.7 %RH accuracy,
SOIC-8 SMD, with filter, condensation-resistant, five units on tape (sample)
1 Orders of 250 units or more are packaged on tape and reel.

sensing.honeywell.com
SENSOR REHYDRATION


• Exposuretoelevatedtemperatures,suchasthose
experienced during solder reflow, may dry out the sensing
element. It is recommended that the sensor be allowed time
to rehydrate after soldering or other high temperature/dry
exposures.
• Exposuretotheseconditionswillnotpermanentlydamagethe
sensor. It will generally return to its factory-calibrated value after
rehydration.
• Ifrehydrationisnotperformed,thesensormayreadaslight
offset that slowly disappears over time as the sensor becomes
exposed to ambient conditions. Conversely, extended
exposure to condensing and high humidity environments
(>90 %RH) may cause a revisable shift in readings which will
generally return to normal after the sensor has been allowed to
dry off.
To rehydrate the sensor, expose it to room temperature under
ambient conditions (>50 %RH) for a minimum of five hours.

ThefollowingassociatedliteratureisavailableontheWeb:
• Productinstallationinstructions
• Productapplicationnote
• Applicationsheets:
– Humidity Sensor Performance Characteristics
– Humidity Sensor Theory and Behavior
– Humidity Sensor Moisture and Psychrometrics
– Humidity Sensor Chemical Resistivity
– Thermoset Polymer-Based Capacitive Sensors
• TechnicalNotes:
– I2C Communication with the Honeywell HumidIcon™ Digital
Humidity/Temperature Sensors
– SPI Communication with the Honeywell HumidIcon™ Digital
Humidity/Temperature Sensors
– UsingAlarmsontheHoneywellHumidIcon™Digital
Humidity/Temperature Sensors
– EnteringandUsingCommandModeontheHoneywell
HumidIcon™ Digital Humidity/Temperature Sensors
WARNING
PERSONAL INJURY
DO NOT USE these products as safety or emergency stop
devices or in any other application where failure of the
product could result in personal injury.
Failure to comply with these instructions could result in
death or serious injury.
WARNING
MISUSE OF DOCUMENTATION
• Theinformationpresentedinthisproductsheetisfor
reference only. Do not use this document as a product
installation guide.
• Completeinstallation,operation,andmaintenance
information is provided in the instructions supplied with
each product.
Failure to comply with these instructions could result in
death or serious injury.
HIH9000 Series • 

Honeywell warrants goods of its manufacture as being free of
defective materials and faulty workmanship. Honeywell’s standard
product warranty applies unless agreed to otherwise by Honeywell
in writing; please refer to your order acknowledgement or consult
your local sales office for specific warranty details. If warranted
goods are returned to Honeywell during the period of coverage,
Honeywell will repair or replace, at its option, without charge those
items it finds defective. 




While we provide application assistance personally, through our
literature and the Honeywell website, it is up to the customer to
determine the suitability of the product in the application.
Specifications may change without notice. The information we
supply is believed to be accurate and reliable as of this printing.
However, we assume no responsibility for its use.
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Honeywell:
HIH9131-000-001S HIH9131-000-001 HIH9130-000-001 HIH9130-000-001S HIH9121-021-001S HIH9131-021-001
HIH9131-021-001S HIH9130-021-001 HIH9121-021-001 HIH9130-021-001S HIH9120-021-001S HIH9120-021-001