RICOH R5106N Technical data

R5106N SERIES

Microprocessor Supervisory Circuit with Inhibit pin

NO.EA-169-111103

OUTLINE

The R5106N Series are CMOS-based microprocessor supervisory circuit, or high accuracy and ultra low supply current voltage detector with built-in delay circuit and watchdog timer. When the supply voltage is down across the threshold, or the watchdog timer does not detect the system clock from the microprocessor, the reset output is generated.

The voltage detector circuit is used for the system reset, etc. The detector threshold is fixed internally, and the accuracy is ±1.0%. The released delay time (Power-on Reset Delay) circuit is built-in, and output delay time is adjustable with an external capacitor, and the accuracy is ±16%*. When the supply voltage becomes higher than the released voltage, the reset state will be maintained during the delay time. The output type of the reset is selectable, Nch open-drain, or CMOS.

The time out period of the watchdog timer can be also set with an external capacitor, and the accuracy is ±33%*.

There is a function to stop supervising clock by the watchdog timer (INH function).

There are another 4 products by the difference of packages and the function of voltage detector and watchdog timer. The package of R5106N is SOT-23-6.

FEATURES

• Supply Current......................................................................		Typ. 11μA
•	Operating Voltage Range .....................................................	0.9V to 6.0V
< Voltage Detector Part >
•	Detector Threshold Range....................................................	1.5V to 5.5V (0.1V steps)
• Detector Threshold Accuracy................................................		±1.0%
•	Power-on Reset Delay Time accuracy .................................	±16%* (-40°C =< Topt =< 105°C)
• Power-on reset delay time of the voltage detector ...............		Typ. 370ms with an external capacitor : 0.1μF
< Watchdog Timer Part >
•	Built-in a watchdog timer's time out period accuracy ...........	±33%* (-40°C =< Topt =< 105°C)
• Timeout period for watchdog timer .......................................		Typ. 310ms with an external capacitor : 0.1μF
• Reset timer for watchdog timer.............................................		Typ. 34ms with an external capacitor : 0.1μF
•	With Inhibit pin (INH).............................................................	Able to stop watchdog timer
•	Package................................................................................	SOT-23-6

*) Accuracy to center value of (Min.+Max.)/2

APPLICATIONS

• Supervisory circuit for equipment with using microprocessors.

R5106N

BLOCK DIAGRAMS

Nch Open Drain Output (R5106Nxx1A)

CMOS Output (R5106Nxx1C)

VDD	3			VDD	3
	SW1				SW1
	Vref2	Vref1	5 GND		Vref2	Vref1	5 GND
CT	6		5 GND	CT	6		5 GND
	SW2	CLOCK			SW2	CLOCK
	WATCHDOG	CLOCK	1 SCK		WATCHDOG	CLOCK	1 SCK
	TIMER	DETECTOR	1 SCK		TIMER	DETECTOR	1 SCK
RESETB	4		2 INH RESETB		4
			2 INH RESETB		4		2 INH
		SW1: "L"=ON,		SW2: "H"=ON

SELECTION GUIDE

The detector threshold, the output type and the taping type for the ICs can be selected at the users’ request. The selection can be made with designating the part number as shown below;

Product Name	Package	Quantity per Reel	Pb Free	Halogen Free

R5106Nxx1 -TR-FE	SOT-23-6	3,000 pcs	Yes	Yes

xx: The detector threshold can be designated in the range from 1.5V(15) to 5.5V(55) in 0.1V steps.

: Designation of Output Type

(A) Nch Open Drain

R5106N

SERIES SELECTION

R5105N

R5106N

R5107G

R5108G

R5109G

Package

SOT-23-6

SSOP-8G

With INH pin (Inhibit)

Yes

2 clock input

Yes

With MR pin (Manual Reset)

Yes

With SENSE pin

Yes

CD pin and

Operating

Supply Current

Remarks

CTW pin are

Voltage Range

combined uses.

1.5V to 6.0V

11.5μA

PIN CONFIGURATION

• SOT-23-6

6	5	4

(mark side)

PIN DESCRIPTIONS

• SOT-23-6

Pin No.	Symbol	Description
1	SCK	Clock Input Pin from Microprocessor

2	INH	Inhibit Pin ("L": Inhibit the watchdog timer)

3	VDD	Power supply Pin

4	RESETB	Output Pin for Reset signal of Watchdog timer and Voltage Detector.
4	RESETB	(Output "L" at detecting Detector Threshold and Watchdog Timer
		Reset.)
5	GND	Ground Pin

6	CT	External Capacitor Pin for Setting Reset and Watchdog Timeout
6	CT	Periods and delay time of Voltage Detector
		Periods and delay time of Voltage Detector

R5106N

ABSOLUTE MAXIMUM RATINGS				Topt=25°C
Symbol		Item	Rating	Unit
VDD	Supply Voltage		-0.3 to 7.0	V

VCT	Output Voltage	Voltage of CT Pin	-0.3 to VDD + 0.3	V

VRESETB		Voltage of RESETB Pin	-0.3 to 7.0	V
VRESETB		Voltage of RESETB Pin	-0.3 to 7.0	V

VSCK	Input Voltage	Voltage of SCK Pin	-0.3 to 7.0	V

VINH		Voltage of INH Pin	-0.3 to 7.0	V
VINH		Voltage of INH Pin	-0.3 to 7.0	V

IRESETB	Output Current	Current of RESETB Pin	20	mA

PD	Power Dissipation (SOT-23-6)*		420	mW

Topt	Operating Temperature Range		-40 to 105	°C

Tstg	Storage Temperature Range		-55 to 125	°C

* ) For Power Dissipation, please refer to PACKAGE INFORMATION.

ABSOLUTE MAXIMUM RATINGS

Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the permanent damages and may degrade the life time and safety for both device and system using the device in the field.

The functional operation at or over these absolute maximum ratings is not assured.

R5106N

ELECTRICAL CHARACTERISTICS

VDD=6.0V, CT=0.1μF, In case of Nch Open Drain Output type, the output pin is pulled up with a resistance of 100kΩ (R5106Nxx1A), unless otherwise noted.

The specification in

is checked and guaranteed by design engineering at −40°C =< Topt =< 105°C.

• R5106Nxx1A/C

Topt=25°C

Symbol

Item

Conditions

Min.

Typ.

Max.

Unit

VDD

Operating Voltage

0.9

6.0

ISS

Supply Current

VDD= -VDET+0.5V,

μA

Clock pulse input

• VD Part

Symbol

Item

Conditions

Min.

Typ.

Max.

Unit

-VDET

Detector Threshold

Topt=25°C

×0.990

×1.010

−40°C =< Topt =< 105°C

×0.972

×1.015

-VDET

VHYS

Detector Threshold Hysteresis

-VDET

×0.03

×0.05

×0.07

-VDET/

Detector Threshold

−40°C =< Topt =< 105°C

±100

ppm/°C

Topt

Temperature Coefficient

tPLH

Output Delay Time

CT=0.1μF *1

370

340

467

IRESETB

Output Current

Nch

VDD=1.2V, VDS=0.1V

0.38

0.8

(RESETB Output pin)

Pch *2

VDD=6.0V, VDS=0.5V

0.9

0.65

• WDT Part

Symbol

Item

Conditions

Min.

Typ.

Max.

Unit

tWD

Watchdog Timeout period

CT=0.1μF *1

310

230

450

tWR

Reset Hold Time of WDT

CT=0.1μF *1

VSCKH

SCK Input "H"

VDD×0.8

6.0

VSCKL

SCK Input "L"

VDD×0.2

VINHH

INH Input "H"

1.0

6.0

VINHL

INH Input "L"

0.35

RINH

INH pull-up Resistance

110

kΩ

164

tSCKW

SCK Input Pulse Width

VSCKL=VDD×0.2

500

VSCKH=VDD×0.8

All of unit are tested and specified under load conditions such that Topt=25°C except for Detector Threshold Temperature Coefficient.

*1) The specification does not contain the temperature characteristics of the external capacitor. *2) In case of CMOS type (R5106Nxx1C)

RECOMMENDED OPERATING CONDITIONS (ELECTRICAL CHARACTERISTICS)

All of electronic equipment should be designed that the mounted semiconductor devices operate within the recommended operating conditions. The semiconductor devices cannot operate normally over the recommended operating conditions, even if when they are used over such conditions by momentary electronic noise or surge. And the semiconductor devices may receive serious damage when they continue to operate over the recommended operating conditions.

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