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R3120 Series

36V Input Voltage Detector with Delay Function or SENSE pin

  • Automotive
  • PLP
  • AEC-Q100
  • RoHS

The R3120 Series are CMOS-based 36V input voltage detector ICs. Since the maximum input voltage of R3120 is 36V (absolute maximum rating: 50V) and R3120 can detect up to 12V without divider resistor, it is suitable for automotive applications. There are two versions: A version has the CD pin for setting the output delay time. E version has the SENSE pin. The output delay time accuracy of R3120xxxxA is -50% to +80%. The reset signal of R3120xxxxE does not become unstable under the condition that the power supply is sufficient to operate the IC, and the "L" can be maintained. SOT-23-5 package is available.

Specs & Datasheets

  Automotive
Operating Voltage Range R3120NxxxA: 1.2 V to 36.0 V (50.0 V)
R3120NxxxE: 2.1 V to 6.0 V (7.0 V)
Operating Temperature Range -40°C to 105°C (125°C)
Supply Current Typ. 3.3 µA
Detector Threshold Range 2.3 V to 12.0 V (0.1 V step)
Detector Threshold Accuracy ±1.5% (Ta = 25°C)
Detector Threshold Temperature Coefficient Typ. ±100 ppm/°C
Release Delay Time R3120NxxxA: Typ.85 ms (CD = 0.01 µF)
Release Delay Time Accuracy R3120NxxxA: −50% to 80%
Output Type Nch Open Drain
Package SOT-23-5

Download Datasheet

Technical Documents

R3120NxxxA Typical Application

R3120NxxxA Typical Application

When using a shared input voltage between R3120 and CPU

R3120NxxxE Typical Application

R3120NxxxE Typical Application

When using a shared input voltage between R3120 and CPU

R3120NxxxA Timing Chart

R3120NxxxA Timing Chart

R3120NxxxE Timing Chart

R3120NxxxE Timing Chart

Quality & Packages

Product Name Compatibility Package Marking Reliability
R3120Nxxxx-TR-AE
  • gradeAutomotiveA
  • aecQ1001
  • plpP
SOT-23-5 R3120N R3120N-AE

Refer to the datasheets for the details on the product.
The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.
Please contact us or our distributors for unpublished reliability information.

Sample / Buy

Functional Description

Search for similar products under conditions below.

Category:Voltage Detectors (Reset ICs)

VIN
min (V)
1.2
VIN
max (V)
36.0
Release
Delay Time
Adjustable,No
VDET
min (V)
2.3
VDET
max (V)
12.0