HL5816

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

HL5816A is a multiple point object proximity sensor IC, which can be used to determine the position of an object in a keypad and can be called capacitive touch sensor.

The sensors of the object position detector are composed of multiple arrays of sensor plates. HL5816A offers 16 touch keys.

HL5816A 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.

HL5816A is fabricated by CMOS process with very low power consumption. There are two operating mode, low power current mode and normal mode. In low power mode, the operating current is only about 10uA. In normal operating mode, the response time is very fast. All of the 16 keys can operate in the low power state. When there is a key detected, HL5816A will enter into normal state with fast response time. In the normal state, HL5816A will enter into low power state if there is not key detected for 30sec.

n order to expand the number of the keys multiple numbers of HL5816A can be used in one system. The maximum number of HL5816A can be used in one system is eight. There are address pins ADD2, ADD1 and ADD0 which can be used to identify which HL5816A is chosen by microprocessor.

FEATURES

  • Mixed mode integrated circuit
  • Low operating current
  • Serial digital data bus
  • Dual operating modes: low power mode and normal mode
  • Extra low current in low power mode (10uA)
  • 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 HL5816
  • Built-in DATA buffer
  • High temperature variation resistance
  • High noise interference resistance

ELECTRICAL CHARACTERISTICS (VDD=4.5, GND=0V, VSL=1, Ta=+25℃)


PARAMETER CONDITIONS MIN TYP MAX UNITS
VDD Supply Voltage 3.5 4.5 5.5 V
Standby Current MRSTN = GND   0.2   uA
Operating Current fosc=1MHz Normal State   0.5   mA
Low Power State   35   uA
Oscillation frequency R = 160K   1.1   MHz
Input low voltage       0.9 V
Input high voltage   3.5     V
Output low voltage I out = 15mA   0.2 0.4 V
Output high voltage I out = 5mA 4.0 4.3   V

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

PARAMETER CONDITIONS MIN TYP MAX UNITS
VDD Supply Voltage 2.5 3.0 5.5 V
Standby Current MRSTN = GND   0.2   uA
Operating Current fosc=1MHz Normal State   0.2   mA
Low Power State   10   uA
Oscillation frequency R = 160K   1   MHz
Input low voltage       0.9 V
Input high voltage   2.1     V
Output low voltage I out = 10mA   0.2 0.4 V
Output high voltage I out = 3mA 2.4 2.8   V

APPLICATION CIRCUIT I (16 KEYS) QFP 44PIN

APPLICATION CIRCUIT II (16 KEYS) QFN 40PIN

APPLICATION CIRCUIT III (12 KEYS) LQFP 32PIN

APPLICATION CIRCUIT IV (8 KEYS) SKINNY 28PIN