HOLTEK INTEGRATED CIRCUITS

Product Details:

Features Operating voltage: 2.0V~5.5V Maximum input serial clock: 500kHz at VDD=2V, 2MHz at VDD=5V Operating current: less than 1A at 2V, less than 1.2A at 5V TTL compatible VIH: 2.0V~VDD+0.3V at VDD=5V VIL: 0.3V~+0.8V at VDD=5V Two data transmission modes: single-byte, or burst mode Serial I/O transmission All registers store BCD format HT1380: 8-pin DIP package HT1381: 8-pin SOP package General Description The HT1380/HT1381 is a serial timekeeper IC which provides seconds, minutes, hours, day, date, month and year information. The number of days in each month and leap years are automatically adjusted. The HT1380/HT1381 is designed for low power consumption and can operate in two modes: one is the 12-hour mode with an AM/PM indicator, the other is the 24-hour mode. The HT1380/HT1381 has several registers to store the corresponding information with 8-bit data format. A 32768Hz crystal is required to provide the correct timing. In order to minimize the pin number, the HT1380/HT1381 use a serial I/O transmission method to interface with a microprocessor. Only three wires are required: (1) REST, (2) SCLK and (3) I/O. Data can be delivered 1 byte at a time or in a burst of up to 8 bytes

Additional Information:

• Port of Dispatch: undefined

Product Details:

DTMF Generators

The HT9200A/B tone generators are designed for MCU interfaces. They can be instructed by a MCU to generate 16 dual tones and 8 single tones from the DTMF pin. The HT9200A provides a serial mode whereas the HT9200B contains a selectable serial/parallel mode interface for various applications such as security systems, home automation, remote control through telephone lines, communication systems, etc.

 

Operating voltage: 2.5V~5.5V

Serial mode for the HT9200A

Serial/parallel mode for the HT9200B

Low standby current

Low total harmonic distortion

3.58MHz crystal or ceramic resonator

HT9200A: 8-pin DIP/SOP package

HT9200B: 14-pin SOP package

Additional Information:

• Item Code: HT9200A
• Port of Dispatch: undefined

Product Details:

The HT9170D-18SOPLF is a DTMF (Dual Tone Multi Frequency) receiver in 18 pin SOP package. This receiver has integrated digital decoder, bandsplit filter function as well as power down mode and inhibit mode operations. It uses digital counting techniques to detect and decode all 16 DTMF tone pairs into 4bit code output. Highly accurate switched capacitor filters are implemented to divide tone signals into low and high group signals. A built-in dial tone rejection circuit is provided to eliminate need for prefiltering.

• Operating voltage range from 2.5V to 5.5V
• 3.58MHz crystal or ceramic resonator
• Minimal external components
• No external filter is required
• Low standby current on power down mode
• Excellent performance
• Tristate data output for MCU interface
• 1633Hz can be inhibited by INH pin
• Operating temperature range from -20°C to 75°C

Applications

Communications & Networking

Additional Information:

• Port of Dispatch: undefined

Product Details:

The HT1381-8SOPLF is a serial Timekeeper Chip IC which provides seconds/minutes/hours/day/date/month/year information. The number of days in each month and leap years are automatically adjusted. This is designed for low power consumption and can operate in two modes, one is the 12hour mode with an AM/PM indicator and the other is the 24hour mode. This has several registers to store the corresponding information with 8-bit data format. A 32768Hz crystal is required to provide the correct timing. In order to minimize the pin number, the chip uses a serial I/O transmission method to interface with a microprocessor.

TTL compatible

Two data transmission modes - Single-byte or burst mode

Serial I/O transmission

All registers store BCD format

Applications
Security

Additional Information:

• Port of Dispatch: undefined

Product Details:

Features for the LM224

• 2-kV ESD Protection for:
  • LM224K, LM224KA
  • LM324K, LM324KA
  • LM2902K, LM2902KV, LM2902KAV
• Wide Supply Ranges
  • Single Supply: 3 V to 32 V
    (26 V for LM2902)
  • Dual Supplies: ±1.5 V to ±16 V
    (±13 V for LM2902)
• Low Supply-Current Drain Independent of
  Supply Voltage: 0.8 mA Typical
• Common-Mode Input Voltage Range Includes
  Ground, Allowing Direct Sensing Near Ground
• Low Input Bias and Offset Parameters
  • Input Offset Voltage: 3 mV Typical
    A Versions: 2 mV Typical
  • Input Offset Current: 2 nA Typical
  • Input Bias Current: 20 nA Typical
    A Versions: 15 nA Typical
• Differential Input Voltage Range Equal to
  Maximum-Rated Supply Voltage:
  32 V (26 V for LM2902)
• Open-Loop Differential Voltage Amplification:
  100 V/mV Typical
• Internal Frequency Compensation
• On Products Compliant to MIL-PRF-38535,
  All Parameters are Tested Unless Otherwise
  Noted. On All Other Products, Production
  Processing Does Not Necessarily Include Testing
  of All Parameters.

Description for the LM224

These devices consist of four independent high-gain frequency-compensated operational amplifiers that are designed specifically to operate from a single supply or split supply over a wide range of voltages.