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HT1632 Dataheets PDF



Part Number HT1632
Manufacturers Holtek Semiconductor
Logo Holtek Semiconductor
Description LED Driver
Datasheet HT1632 DatasheetHT1632 Datasheet (PDF)

HT1632 32´8 & 24´16 LED Driver Features · Operating voltage: 2.4V~5.5V · Multiple LED display - 32 out bits/8 commons and · Serial MCU interface - CS, RD, WR, DATA · Data mode & command mode instruction · Cascading function for extended applications www.DataSheet4U.com 24 out bits/16 commons · Integrated display RAM - select 32 out bits & (up to 5 HT1632s possible) · Selectable NMOS open drain output driver and 8 commons for 64´4 display RAM, or select 24 outbits & 16 commons for 96´4 displa.

  HT1632   HT1632


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HT1632 32´8 & 24´16 LED Driver Features · Operating voltage: 2.4V~5.5V · Multiple LED display - 32 out bits/8 commons and · Serial MCU interface - CS, RD, WR, DATA · Data mode & command mode instruction · Cascading function for extended applications www.DataSheet4U.com 24 out bits/16 commons · Integrated display RAM - select 32 out bits & (up to 5 HT1632s possible) · Selectable NMOS open drain output driver and 8 commons for 64´4 display RAM, or select 24 outbits & 16 commons for 96´4 display RAM · 16-level PWM brightness control · Integrated 256kHz RC oscillator PMOS open drain output driver for commons · 52-pin QFP package Applications · Industrial control indicator · Digital clock, thermometer, counter, voltmeter · Instrumentation readouts · Other consumer application · LED Displays General Description The HT1632 is a memory mapping LED display controller/driver, which can select a number of out bits and commons. These are 32 out bits & 8 commons and 24 out bits & 16 commons. The device supports 16-gradation LEDs for each out line using PWM control with software instructions. A serial interface is conveniently provided for the command mode and data mode. Only three or four lines are required for the interface between the host controller and the HT1632. The display can be extended by cascading the HT1632 for wider applications. Block Diagram V D D V S S D is p la y R A M C O M 0 C S R D W R D A T A C o n a n T im C ir c tro l d in g u it C O M 7 O U T B IT 0 L E D D r iv e r O U T B IT 2 3 O U T B IT 2 4 /C O M 1 5 O U T B IT 3 1 /C O M 8 L E D _ V S S O S C S Y N C T im in g G e n e ra to r P W M C o n tro l Rev. 1.00 1 October 2, 2007 HT1632 www.DataSheet4U.com Pin Assignment O U O U O U L E O U O U O U O U O U O U O U O U L E T B T B T B D _ T B T B T B T B T B T B T B T B D _ IT 2 IT 2 IT 2 V S IT 1 IT 1 IT 1 IT 1 IT 1 IT 1 IT 1 IT 1 V S S S 5 2 5 1 5 0 4 9 4 8 4 7 4 6 4 5 4 4 4 3 4 2 4 1 4 0 1 2 3 2 0 1 2 3 4 5 6 7 8 9 O U T O U T O U O U O U O U O U O U L E D O U O U O U O U B IT 1 B IT 1 T B IT T B IT T B IT T B IT T B IT T B IT _ V S T B IT T B IT T B IT T B IT S 1 0 9 8 7 5 4 3 9 3 8 3 7 3 6 3 5 6 5 7 6 H T 1 6 3 2 8 9 1 0 4 3 2 1 0 5 2 Q F P -A 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 2 2 2 3 2 4 2 5 2 6 3 4 3 3 3 2 3 1 3 0 2 9 2 8 2 7 O U O U O U O U O U L E O U O U O U O U C O C O C O T B IT T B IT T B IT T B IT T B IT D _ V S T B IT T B IT T B IT T B IT M 7 M 6 M 5 2 3 2 4 2 5 2 6 2 7 S 2 8 2 9 3 0 3 1 /C /C /C /C /C /C /C /C O M O M O M O M O M O M O M O M 1 5 1 4 1 3 1 2 1 1 1 0 9 8 C O M C O M C O M C O M C O M V D D S Y N C C S R D W R D A T A O S C V S S 0 1 2 3 4 Pin Description Pad Name OUTBIT0~OUTBIT23 OUTBIT24/COM15~ OUTBIT31/COM8 COM0~COM7 SYNC I/O O O O I/O Description Line drivers. These pins drive the LEDs. Drive LED output or Common output Common outputs Cascade synchronization input and output If the system clock is is sourced from an external clock source, the external clock source should be connected to this pad. If the on-chip RC oscillator is selected, this pad can be connected to a high or low level. If the cascade mode is selected, this pad is the driver clock signal. Serial data input or output with pull-high resistor WRITE clock input with pull-high resistor Data on the DATA lines are latched into the HT1632 on the rising edge of the WR signal. READ clock input with pull-high resistor. The HT1632 RAM data is clocked out on the falling edge of the RD signal. The clocked out data will appear on the DATA line. The host controller can use the next rising edge to latch the clocked out data. Chip select input with pull-high resistor When the CS line is high, the data and command read from or written to the HT1632 is disabled, and the serial interface circuit is also reset. If CS is low, the data and command transmission between the host controller and the HT1632 are all enabled. Negative power supply for driver circuit, ground. Negative power supply for logic circuit, ground. Positive power supply for logic and driver circuit. OSC I/O DATA WR I/O I RD I CS I LED_VSS VSS VDD ¾ ¾ ¾ Rev. 1.00 2 October 2, 2007 HT1632 www.DataSheet4U.com Absolute Maximum Ratings Supply Voltage ...........................VSS-0.3V to VSS+5.5V Input Voltage.............................VSS-0.3V to VDD+0.3V Storage Temperature ............................-50°C to 125°C Operating Temperature...........................-40°C to 85°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 Symbol VDD IDD ISTB VIL VIH IOL1 IOH1 IOL2 IOH2 IOL3 IOH3 IOL4 RPH Parameter Operating Voltage Operating Current Standby Current Input Low Voltage Input High .


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