HT49C30L datasheet(5/43 Pages) HOLTEK

5 / 43 page

Pad Name

I/O

Options

Description

OSC4

OSC3

RTC or

System Clock

Real time clock oscillators. OSC3 and OSC4 are connected to a 32768Hz

crystal oscillator for timing purposes or to a system clock source (depending

on the options).

VDD

¾¾

Positive power supply

OSC2

OSC1

Crystal or RC

OSC1 and OSC2 are connected to an RC network or a crystal (by options)

for the internal system clock. In the case of RC operation, OSC2 is the output

terminal for 1/4 system clock.

The system clock may come from the RTC oscillator. If the system clock co-

mes from RTCOSC, these two pins can be floating.

RES

Schmitt trigger reset input, active low

Absolute Maximum Ratings

Supply Voltage..................................VSS

-0.3V to 5.5V*

Supply Voltage ................................VSS

-0.3V to 2.2V**

Storage Temperature ............................

-50°Cto125°C

Input Voltage..............................VSS

-0.3V to VDD+0.3V

Operating Temperature ...........................

-40°Cto85°C

Note: These are stress ratings only. Stresses exceeding the range specified under

²Absolute Maximum Ratings² may

cause substantial damage to the device. Functional operation of this device at other conditions beyond those

listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil-

ity.

²*² For HT49R30A-1/HT49C30-1

²**² For HT49C30L

D.C. Characteristics

VDD=1.5V for HT49C30L, VDD=3V&VDD=5V for HT49R30A-1 and HT49C30-1

Ta=25

°C

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

VDD

Conditions

VDD

Operating Voltage

for HT49C30L

1.2

2.2

LVR disable

(for HT49R30A-1/HT49C30-1)

2.2

5.5

IDD1

Operating Current

(Crystal OSC)

1.5V No load, fSYS=455kHz

100

No load, fSYS=4MHz

IDD2

Operating Current

(RC OSC)

1.5V No load, fSYS=400kHz

100

No load, fSYS=4MHz

IDD3

Operating Current

(fSYS=32768Hz)

1.5V

No load

2.5

0.3

0.6

ISTB1

Standby Current

(*fS=T1)

1.5V

No load, system HALT,

LCD off at HALT

0.1

0.5

¾¾

HT49R30A-1/HT49C30-1/HT49C30L

Rev. 1.10

September 25, 2002

HT49C30L Datasheet(PDF) 5 Page - Holtek Semiconductor Inc

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