HL5612

Patent No.:

  • US 7,023,221 B1 (U.S.A.)
  • I 259908 (R.O.C.)
  • EP 1791260 B1 (EUROPE)
  • ZL 200510080231.9 (CHINA)
  • 特許第4365817号 (JAPAN)
  • US 7,944,217 B2 (U.S.A.)

GENERAL DESCRIPTION

HL5612 is a multiple point object proximity sensor IC, which can be used to determine position of an object in a keypad and can be called object position detector.

The sensors of the object position detector are composed of multiple arrays of sensor plates. HL5612 offers 12 touch keys.

HL5612 is a mixed mode IC fabricated by CMOS technology. The signal at the keypad is input to sensor processor by scan and converted to digital data.

HL5612 can communicate with external microprocessor through SCL and SDA pins. When a key is touched the READYN pin is activated to LOW state, and which means DATA is ready to be read. SDA and SCL are serial data bus.

In order to expand the number of the keys multiple numbers of HL5612 can be used in one system. The maximum number of HL5612 can be used in one system is eight. There are address pins ADD2, ADD1 and ADD0 which can be used to identify which HL5612 is chosen by microprocessor.

FEATURES

  • Mixed mode integrated circuit
  • Low operating current
  • Serial digital data bus
  • Parameters can be programmed by external microprocessor
  • Keys of keypad are expandable
  • Built-in regulator circuit
  • Three address pins which can be used to identify HL5612
  • Built-in data buffer

ELECTRICAL CHARACTERISTICS (VDD=4.5V, GND=0V, Ta=+25℃)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VDD Supply Voltage 3.5 4.5 5.5 V
Standby Current ABLEN = VDD   0.2 10 uA
Operating Current fosc = 500kHz   0.45   mA
Oscillation frequency R = 160K   500   kHz
Input low voltage       0.8 V
Input high voltage   3.5     V
Output low voltage       0.8 V
Output high voltage   3.5     V

ELECTRICAL CHARACTERISTICS (VDD=3V, GND=0V, Ta=+25℃)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VDD Supply Voltage 2.5 3.0 3.6 V
Standby Current ABLEN=VDD   0.2 10 uA
Operating Current fosc=500kHz   0.25   mA
Oscillation frequency R = 160K   500   kHz
Input low voltage       0.8 V
Input high voltage   2.4     V
Output low voltage       0.8 V
Output high voltage   2.4     V

APPLICATION CIRCUIT