ICMM1245CF_技术文档

System Reset (with battery back-up) MM1026, 1245, 1080, 1134

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System Reset (with battery back-up)

Monolithic IC MM1026, 1245, 1080 ,1134

Outline

These ICs protect S-RAM data in back-up mode (CS signal makes R-SAM CE pin low and^{-------------------------------------------}

C

E

high) when power supply voltage goes below a certain set voltage (detection voltage 3.5V, 4.2V or 4.5V typ.).

Further, it switches from main power supply to battery back-up when power supply voltage drops.

Conversely, when power supply rises, it first switches the S-RAM from battery back-up to main power supply

(switching voltage 3.3V typ.), then from back-up mode to normal mode (CS signal makes S-RAM CE pin high

and CE pin low). These signal processes provide reliable protection against data damage.

Features

MM1026

• Power supply switching circuit (switching between main power supply and battery)

• CS control for S-RAM (normal mode : S-RAM can be accessed; back-up mode: S-RAM can not be

accessed low current consumption mode)

• Reset output

MM1245

• Power supply switching circuit

• CS control for S-RAM

• CS control signal delay, power supply line chattering removal approx. 1s max.

• Supply current from main power supply can be increased by external power transistor

MM1080

• Power supply switching circuit

• CS control for S-RAM

• Low current consumption 60µA typ.

MM1134

• Power supply switching circuit

• CS control for S-RAM

• Gate circuit with CS signal

Characteristics

1. Battery back-up

1. Low IC current consumption (loss current)

2. Drop voltage inside IC (input/output voltage difference)

3. Reverse current (reverse leak current)

0.3µA typ.

0.3V typ.

I^O=100µA

0.1µA max.

2. Normal operation

1. Drop voltage inside IC (input/output voltage difference)

I^O=50µA

IO=50mA

0.2V typ.

4.8V typ.

3.3V typ.

2. Output voltage

3. Battery-V^CCswitching voltage

4. Detection voltage (CS,^{---------------------------------------------------------}

V^CC=5V

C

S

, reset output)

A : 3.5V typ.

B : 4.2V typ.

C : 4.5V typ.

System Reset (with battery back-up) MM1026, 1245, 1080, 1134

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Package

DIP-8B (MM

SOP-8C (MM

D)

F)

contains detection voltage rank.

*

Applications

1. Memory cards (S-RAM cards)

2. PCs, word processors

3. Fax machines, photocopiers, other office equipment

4. Sequence controllers, other FA equipment

5. Video games and other equipment with S-RAMs

Pin Assignment

Pin name

Pin no.

MM1026

MM1245

MM1080

GND

NC

MM1134

1

2

3

4

5

6

7

8

GND

T^C

GND

8

1

7

2

6

3

5

4

RESET

CS

V^BATT

RESET

CS

VBATT

CS

VBATT

NC

VOUT

NC

CS

V^OUT

NC

CS

VOUT

Tr.B

VCC

CS

VOUT

Y

DIP-8P(C)/SOP-8P(C)/SOP-8P(C) Taping

(TOP VIEW)

V^CC

VCC

Block Diagram

MM1026

System Reset (with battery back-up) MM1026, 1245, 1080, 1134

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MM1245

MM1080

MM1134

System Reset (with battery back-up) MM1026, 1245, 1080, 1134

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Equivalent Circuit Diagram

MM1026

MM1245

System Reset (with battery back-up) MM1026, 1245, 1080, 1134

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MM1080

MM1134

°

(Ta=25 C)

Absolute Maximum Ratings

Item

Symbol

T^STG

T^OPR

V^CCmax.

V^CCOP

Pd

Rating

Units

°

C

°

C

V

mW

Storage temperature

Operating temperature

Power supply voltage

Operating voltage

Allowable loss

-

40~+125

-20~+75

7

300

MM1245

MM1026

MM1134

MM1080

80

mA

Output current

I^O1

I^O2

50

200

mA

µA

Output current

Note : IO1 expresses VCC output current value, and IO2 expresses VBATT output current value.

System Reset (with battery back-up) MM1026, 1245, 1080, 1134

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(Except where noted otherwise, Ta=25°C, V^CC=V^RS=5V, R^RS=10kΩ)

Electrical Characteristics

Item

Symbol

Measurement conditions

Min. Typ. Max. Units

MM1026

2.0 mA

Consumption

current

MM1245

MM1080

MM1134

0.6

1.0

60

1.4

1.4 mA

120 µA

2.2 mA

I^CC

V^CC=5V, V^BATT=3V, I^O1=0mA

I/O voltage difference 1

Output voltage 1

V^SAT1

V^O1

VSAT2

VCC=5V, VBATT=3V, IO1=1mA

V^CC=5V, VBATT=3V, IO1=1mA

VCC=5V, VBATT=3V, IO1=30mA

0.03 0.05

4.95 4.97

0.15 0.30

V

I/O voltage difference 2

MM1245

MM1026

MM1134

MM1080

MM1245

V^CC=5V, V^BATT=3V, I^O1=15mA

4.75 4.90

V

Output voltage 2

V^O2

V^CC=5V, VBATT=3V, IO1=30mA

VCC=5V, VBATT=3V, IO1=80mA

VCC=5V, VBATT=3V, IO1=50mA

4.5

4.7

I/O voltage difference 3

VSAT3

0.30 0.50

4.8

Output voltage 3 Except MM1245 VO3

4.7

V

mV

A type

3.35 3.50 3.65

4.05 4.20 4.35

4.30 4.50 4.70

100

Detection voltage

B type

C type

V^S

VCC=H

VCC=L

L

Hysteresis voltage

H

Maximum base

driving current

MM1245

I^BUF

V^CC=5V, V^BUF=4.5V

14

20

26

mA

V

Reset output voltage L

Reset leakage current H

Reset operation

MM1026

MM1134

VRSL

IRSH

VCC=3V

V^CC=5V, VRS=7.0V

0.2

0.4

0.01 0.1 µA

<

V^OPL

V^RSL0.4V, V^CC=H

L

0.8

1.2

0.1

V

=

limit voltage

MM1080

(CS only)

MM1026

CS output voltage L

CS output voltage H

V^CSL

V^CSH

VCC=3.7V, VBATT=3V, ICS=1µA

V

VCC=5V, VBATT=3V, ICS=

-

1µA

4.90

^{--------------}C^{---------------------------------------}

S

output voltage L

VCSL VCC=5V, VBATT=3V, ICS=1µA

MM1245

0.1

V

MM1134

^{--------------}C^{---------------------------------------}

S

output voltage H

VCSH

VCC=3.7V, VBATT=3V, ICS=

-

1µA

VO-0.1

V

°

Detection voltage temperature characteristic VS/ T

0.05 %/ C

ON delay time

OFF delay time

Td^ON

Td^OFF

ITC

I^CSSOU

V^B

CTC=OPEN

VCC=5V, VBATT=3V, VTC=0V

VCC=5V, VBATT=3V, VCS=4.5V

50

5

µs

MM1245

T^Cpin charge current

CS source current

0.60 0.80 1.10 µA

MM1245

25

50

80

µA

V

Power supply switching voltage

Hysteresis voltage

VCC=H

VCC=L

L

H

3.15 3.30 3.45

100

V^B

mV

°

Switching voltage temperature characteristic VB/ T

0.05 %/ C

Loss current

I/O voltage difference 2

Output voltage 4

Output voltage 5

Reverse current

I^BL

Vsat2

V⁰4

V⁰5

I^OREV

VCC=0V, VBATT=3V, IO2=0µA

V^CC=0V, VBATT=3V, IO2=1µA

VCC=0V, VBATT=3V, IO2=1µA

VCC=0V, VBATT=3V, IO2=100µA

VCC=5V, VBATT=0V

0.1

0.3

µA

V

µA

0.2

2.8

2.7

2.6

0.1

Y

^{----------------------------------------------}pin LO H

Note : Detection voltage ranks

A, B

B

MM1026

MM1134, MM1080

MM1245

B, C

System Reset (with battery back-up) MM1026, 1245, 1080, 1134

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Timing Chart

MM1026

MM1245

VS

VE

VS

V

V^S

VB

VCC

TC

V^BOPL

VOPL

VCC

VTH

Set inside IC

VRSL

VCSH

RESET

VRSH

VCSL

0V

Delay

CS

VCSL

CS

VCSL

VCSH

VCSL

0V

V^OUT

VO1,O2,O3

V^OUT

VO1,O2,O3

VO4,O5

MM1080

MM1134

VS

VE

VS

VE

V

V^S

VS

VB

V^BOPL

VCC

VY

*

Y

0V

BATTERY

CS

VRSL

VCSL

0V

RESET

CS

VCSL

0V

VCSL

4.8V

CS

VCSL

V^OUT

VO1,O2

2.8V

0V

VO3,O4

VOUT

VO1,O2,O3

VO4,O5

Use^{--------------------------------------------}

Y

pin input voltage at less than 5V when V^CCVs.

=

<

*

(MM1026, MM1134 series)

Characteristics

VOUT-IOUT (VCC=5.0V)

VOUT-IOUT (VBAT=3.0V)

(V)

3.000

5.000

0.100/div

2.000

.0500/div

4.500

.0000

0

1.000

-100.0

0.100/div

10.00/div

IOUT (mA)

System Reset (with battery back-up) MM1026, 1245, 1080, 1134

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VCC-IBAT

VCC-ICC

5.000

40.00

.5000/div

5.000/div

0

.0000

-10.00

.0000

10.00

0

10.00

1.000/div

CC (V)

1.000/div

V

VCC (V)

Current consumption-Temperature

characteristics

Output voltage 1, 2-Temperature

characteristics

0.3

2.0

1.0

0.0

IOL=50mA

0.2

0.1

I^OL=10mA

-50

0

50

100

-50

0

50

100

Ambient temperature (°C)

Output voltage 3, 4-Temperature

0.5

0.4

IOL=100µA

0.3

0.2

0.1

0

I^OL=1µA

-50

0

50

100

Ambient temperature (°C)

Reverse current-Temperature

Loss current-Temperature

1µA

100nA

10nA

100nA

10nA

-80

-50

0

50 100

-80

-50

0

50 100

Ambient temperature (°C)

System Reset (with battery back-up) MM1026, 1245, 1080, 1134

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(MM1080 series)

Characteristics

Current consumption-Temperature (Vcc=5V)

VIN-IIN

V^OUT

(V)

I^IN

(µA)

5.000

100.0

0.5000

/div

10.00

/div

0.0000

.0000

5.000

.0000

100.0

V^IN

.5000/div (V)

I^OUT

10.00/div (mA)

VOUT-IOUT (VBAT-3.0V)

VIN-IBATT

V^OUT

(V)

I^BATT

(µA)

5.000

1.000

.5000

/div

.2000

/div

0

.0000

-

1.000

200.0

.0000

5.000

I^OUT

20.00/div (µA)

V^IN

.5000/div (V)

Current consumption-Temperature (VCC=5V)

VBAT detection voltage-Temperature

(V)

(mV)

(µA)

80

70

60

50

3.3

3.2

3.1

3.0

VBAT detection voltage

Hysteresis voltage

150

100

50

-25

0

25

50

75

-25

0

25

50

75

TEMP (^°C)

CS detection voltage-Temperature

(V)

(mV)

4.5

CS detection voltage

4.0

3.5

150

100

Hysteresis voltage

-25

0

25

50

75

TEMP (^°C)

System Reset (with battery back-up) MM1026, 1245, 1080, 1134

Current consumption-Temperature

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(MM1245 series)

Characteristics

IOUT-VOUT

5.00

4.90

4.80

4.70

4.60

1.5

1.4

1.3

1.2

VOUT

4.50

4.40

4.30

4.20

4.10

4.00

1.1

VOUT-CS

1.0

0.9

0.8

47kΩ

CS open

5

25

45

65

85 105 125

-25

0

25

50

75

IOUT (mA)

Temperature (°C)

CS detection voltage-Temperature

CS-CS pin ON/OFF delay time vs. capacitance TC

10

4.4

4.35

4.3

1

4.25

4.2

100m

10m

4.15

4.1

1m

-25

0

25

50

75

ON delay time

Temperature (°C)

100µ

10µ

1µ

OFF delay time

VBAT detection voltage-Temperature

10p 100p 0.001µ 0.01µ 0.1µ 1µ

3.5

Capacitance (F)

3.45

3.4

Use 1s max. for CS-CS pin ON delay time.

3.35

3.3

3.25

3.2

-25

0

25

50

75

Temperature (°C)


型号：	ICMM1245CF
厂家：	ETC
描述：	Analog IC 模拟IC\n 模拟IC
文件：	总10页 (文件大小：319K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

ICMM1245CF [ETC]

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