Pad No.

Pad Name

I/O

Description

46

IRQ

O

Time base or Watchdog Timer overflow flag, NMOS open drain output.

47, 48

BZ, BZ

O

2kHz or 4kHz frequency output pair (tristate output buffer)

49~53

T1~T4, T000

I

Vary bias current pin

It is usually not connected

Absolute Maximum Ratings

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

-50°Cto125°C

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

-25°Cto75°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 reliability.

D.C. Characteristics

Ta=25

°C

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

Conditions

Operating Voltage

¾¾

2.7

¾

5.2

V

Operating Current

3V

No load/LCD ON

On-chip RC oscillator

¾

150

250

mA

5V

¾

250

370

mA

Operating Current

3V

No load/LCD ON

Crystal oscillator

¾

135

200

5V

¾

200

300

mA

Operating Current

3V

No load/LCD OFF

On-chip RC oscillator

¾

15

30

mA

5V

¾

50

70

mA

Operating Current

3V

No load/LCD OFF

Crystal oscillator

¾

210

mA

5V

¾

310

mA

Standby Current

3V

No load, Power down

mode

¾¾

1

mA

5V

¾¾

2

mA

Input Low Voltage

3V

DB0~DB3, WR,CS,RD

0

¾

0.6

V

5V

0

¾

1.0

V

Input High Voltage

3V

DB0~DB3, WR,CS,RD

2.4

¾

3V

5V

4.0

¾

5V

BZ, BZ, IRQ Sink Current

3V

1.2

2.5

¾

mA

5V

36

¾

mA

BZ, BZ Source Current

3V

-0.9

-1.8

¾

mA

5V

-2

-4

¾

mA

DB0~DB3 Sink Current

3V

1.2

2.5

¾

mA

5V

36

¾

mA

DB0~DB3 Source Current

3V

-0.9

-1.8

¾

mA

5V

-2

-4

¾

mA

LCD Common Sink Current

3V

80

160

¾mA

5V

180

360

¾mA

LCD Common Source Current

3V

-40

-80

¾mA

5V

-90

-180

¾mA

HT1650

Rev. 1.80

5

November 9, 2010

PATENTED