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R3120 Series
36V Input Voltage Detector with Delay Function or SENSE pin

Product Specifications

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.

FEATURES

Operating Voltage Range (Maximum Rating) R3120xxxxA: 1.2 V to 36.0 V (50.0 V)
R3120xxxxE: 2.1 V to 6.0 V (7.0 V)
Operating Temperature Range -40°C to 105°C
Supply Current Typ. 3.3 µA
Detector Threshold Range 2.3 V to 12.0 V (0.1 V steps)
Detector Threshold Accuracy ±1.5% (Ta =25°C)
Detector Threshold Temperature Coefficient Typ. ±100 ppm/°C
Release Output Delay Time R3120NxxxA : Typ.85 ms (at CD= 0.01 µF)
Release Output Delay Time Accuracy R3120NxxxA : −50% to 80%
Output Type Nch. Open Drain
Packages SOT-23-5

APPLICATION INFORMATION

When using a shared input voltage between R3120 and CPU

R3120NxxxA

R3120NxxxE

TIMING CHART

R3120NxxxA

R3120NxxxE

PIN DESCRIPTION

SOT-23-52.9 mm × 2.8 mm

SOT-23-5

1 VDD
2 GND**
3 GND**
4 DOUT
5 CD or SENSE

**) No.2 and No.3 pin must be wired to the GND plane when it is mounted on board.


R3120 Series for Automotive

Ricoh is committed to providing a semiconductor device with the highest level of quality and reliability by restricting the device manufacturing only within Ricoh and the cooperative companies successfully passed our stringent inspections for automotive products. Ricoh established a traceability system and manages manufacturing information and logistics information from the warehouse.


Quality Ranks for Applications

Ricoh offers three different quality ranks for automotive products according to their application purposes.
R3120 Series offer products in Rank 3.

Rank 3: Automotive Accessories

  • Supervisory circuit for car accessories such as car audio equipment, car navigation system, and ETC system.

PRODUCT LONGEVITY PROGRAM

R3120N operate PRODUCT LONGEVITY PROGRAM.
This program has been introduced to help customers select the most appropriate part for applications that require long life cycles.


Operating Temperature Range : -40°C to 105°C


SELECTION GUIDE

The detector threshold and the voltage detection type are user selectable options.

Product Name   Package Quantity per Reel
R3120Nxxx#-TR-AE AutomotiveAutomotive AccessoriesPLP SOT-23-5 3,000
  • xxx … Specify the set detector threshold (−VSET) in the range of 2.3 V (023) to 12.0 V (120) in 0.1 V steps.
  • # … Designation of Version
    A: with CD pin type
    E: with SENSE pin type

DOCUMENT/CONTACT

Package*1 Reliability*2
SOT-23-5 R3120N (-AE)

*1: The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and land pattern (foot pattern).
*2: Reliability file includes a reliability test report and a reflow profile.

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