Epson RTC-72421 A, RTC-72421 B, RTC-72423, RTC-72423 A Min, Typ, Max, Item, Unit, Item, Unit, Item, Unit, Item, Unit, Page, Symbol, Symbol, Symbol, Symbol, MQ - 162, Condition, Condition, Condition, Condition

RTC - 72421 / 72423

„ Characteristics

1. Absolute maximum ratings

Item

Symbol

Condition

Specification

Unit

Supply voltage

VDD

Ta=+25 ° C

− 0.3

to

7.0

V

Input voltage

VI

Ta=+25 ° C

GND− 0.3

to

VDD+0.3

V

Output voltage

VO

Ta=+25 ° C

GND− 0.3

to

VDD+0.3

V

Storage temperature

TSTG

RTC-72421

− 55

to

+85

° C

RTC-72423

− 55

to

+125

° C

2. Recommended operating conditions

Item

Symbol

Condition

Specification

Unit

Supply voltage

VDD

4.5

to

5.5

V

Operating temperature

TOPR

No condensation

RTC-72421 ; −

10 to +70

° C

RTC-72423 ; − 40 to +85

° C

Data hold voltage

VDH

2.0

to

5.5

V

CS1 data hold time

tCDR

See the section on data

2.0 Min.

∝ s

hold timing

Operation recovery time

tr

3. Frequency characteristics and current consumption characteristics

Item

Symbol

Condition

Specification

Unit

RTC-72421A

±

10

Ta=+25 ° C

Frequency tolerance

∆ f/f0

RTC-72421B

±

50

VDD=5.0 V

RTC-72423A

±

20

RTC-72423

±

50

⋅

10-6

RTC-72421 : − 10

° C to +70 ° C

+10 / − 120

(+25 ° C reference)

Operation temperature

RTC-72423 : − 40 ° C to +85 ° C

+10 / − 220

(+25 ° C reference)

Frequency voltage

Ta=+25 ° C

±

5 Max.

⋅ 10-6 / V

characteristics

VDD=2.0 V to 5.5 V

Aging

fa

VDD=5.0 V, Ta=+25 ° C

±

5 Max.

⋅ 10-6 / year

Drop test 3 times on a hard board from

Shock resistance

S.R.

0.75 m height, or 29400 m/s2 ⋅ 0.2 ms ⋅

±

10 Max.

⋅

10-6

1/2 sin wave ⋅ 3 directions

Current consumption

IDD1

Ta=+25 ° C, CS1=0 V

VDD=5.0 V

1.0 Typ.

10 Max.

∝ A

IDD2

I/O currents excluded

VDD=2.0 V

0.9 Typ.

5 Max.

4. Electrical characteristics ( DC characteristics )

Item	Symbol	Condition	Applicable pins	Min.	Typ.	Max.	Unit
High input voltage 1	VIH1		All input pins except for	2.2			V
			CS1
Low input voltage 1	VIL1					0.8
High input voltage 2	VIH2	VDD=2.0 V to	CS1	4/5VDD			V
		5.5 V
Low input voltage 2	VIL2					1/5VDD
Input leakage current 1	ILK1		Input pins except for			1/-1	∝ A
		VI=VDD/0 V	D0 to D3
Input leakage current 2	ILK2					10/-10
			D0 to D3
Low output voltage 1	VOL1	IOL=2.5 mA				0.4
High output voltage	VOH	IOH=-400 ∝ A		2.4			V
Low output voltage 2	VOL2	IOL=2.5 mA	STD.P			0.4
Off-state leakage current	IOFFLK	VI = VDD / 0 V				10/-10	∝ A
Input capacitance	CI	Input	Input pins except for		10
			D0 to D3
		frequency					pF
Input-output capacitance	CI/O	1 MHz	D0 to D3 and STD.P		20

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