HT45F4M View Datasheet(PDF) - Holtek Semiconductor

Part Name

Description

Manufacturer

HT45F4M

Lithium Battery Backup Power ASSP MCU

Holtek Semiconductor 

HT45F4M

Lithium Battery Backup Power ASSP MCU

Symbol

Parameter

IOH2

I/O Port Source Current

(PB4, PB5)

Test Conditions

VDD

Conditions

3V VOH= 0.9VDD

5V VOH= 0.9VDD

VLVR

Low Voltage Reset Voltage —

—

VLVD1

VLVD2

VLVD3

VLVD4

VLVD5

ILVR

ILVD

RPH

LVDEN= 1, VLVD = 2.7V

Low Voltage Detector

Voltage

LVDEN= 1, VLVD = 3.0V

— LVDEN= 1, VLVD = 3.3V

LVDEN= 1, VLVD = 3.6V

LVDEN= 1, VLVD = 4.0V

Additional Power

Consumption if LVR is

used

3V

LVR enable

5V

Additional Power

3V LVD disable → LVD enable

Consumption if LVD is used 5V (LVR enable)

Pull-high Resistance for

3V

—

I/O Ports

5V

—

Note: LVR is aways enabled (HALT mode disabled) fixed @ 2.55V.

A.C. Characteristics

Symbol

fCPU

fSYS

fHIRC

fSUB

tTIMER

tINT

tLVR

tLVD

tLVDS

tSRESET

tEERD

tEEWR

tSST

Parameter

Test Conditions

VDD

Conditions

Operating Clock

2.7V~5.5V

—

4.5V~5.5V

2.7V~5.5V

System Clock (HIRC)

—

4.5V~5.5V

5V Ta= 25°C

HIRC Frequency (note)

4.0V~5.5V Ta= -10°C~85°C

3.6V~5.5V Ta= -40°C~85°C

System Clock (LIRC)

5V Ta= 25°C

2.7V~5.5V Ta= -40°C~85°C

TCKn Input Pin Minimum

Pulse Width

—

—

Interrupt Minimum Pulse Width —

—

Low Voltage Width to Reset

—

—

Low Voltage Width to Interrupt

—

—

LVDO Stable Time

—

For LVR enable,

LVD off → on

Software Reset Width to Reset —

—

EEPROM Read Time

—

—

EEPROM Write Time

—

—

System Start-up Timer Period

(Wake-up from HALT, fSYS off

at HALT state)

—

fSYS= HIRC

—

fSYS= LIRC

System Start-up Timer Period

(Wake-up from HALT, fSYS on

—

—

at HALT state)

Min. Typ. Max. Unit

-8

-16

—

mA

-20 -40

—

mA

-5%×

Typ.

2.55

-5%×

Typ.

V

2.7

V

3.0

V

-5%×

Typ.

3.3

-5%×

Typ.

V

3.6

V

4.0

V

—

30

45

μA

—

60

90

μA

—

30

45

μA

—

60

90

μA

20

60 100 kΩ

10

30

50

kΩ

Min.

DC

DC

—

—

-2%

-5%

-10%

-10%

-30%

—

1

120

20

15

45

—

—

—

—

Typ.

—

—

—

—

30

30

30

32

32

30

3.3

240

45

—

90

2

2

16

2

Ta= 25°C

Max. Unit

7.5

15

7.5

15

+2%

+5%

+10%

+10%

+60%

MHz

MHz

MHz

MHz

MHz

MHz

MHz

kHz

kHz

— ns

5

μs

480 μs

90 μs

— μs

120 μs

4

tSYS

4 ms

—

tSYS

—

tSYS

—

2

—

tSYS

Rev. 1.10

11

January 15, 2013

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