STLED316S| Datasheet

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STLED316S
Serial-Interfaced 6-Digit LED controller with key scan
Data Brief

Features

LED driver with 14 outputs (8 segments / 6 digits) 40mA load current capability for each segment Outputs connect directly to the LEDs or can be open-drain Key-scanning (8x2 matrix) Low power consumption in standby mode 3-wire Serial Bus Interface (CLK, STB, DIN/DOUT) 8-step dimming circuit to control the overall display brightness Single external resistor for output current setting Inputs with Schmitt trigger give superior noise immunity A single LED digit output (DIG1_LED) can be used to drive up to 8 discrete LEDs 8-step dimming circuit to control brightness of individual LEDs for LED digit 5.0V ( 10%) for VCC Drives common-anode LED digits Built-in power on reset and soft-start circuits Available in SO24 package -40 C to 85 C operating temperature range
SO-24

Description
The STLED316S is a compact LED controller and driver that interface microprocessors to LED displays through serial 3-wire interface. It drives LED connected in common anode configuration. The STLED316S drives up to 48 discrete LEDs in 8 segment/6 digit configuration while functioning from a supply voltage of 5.0V. Additionally it can be used to drive 8 discrete LEDs which form a part of LED digit. The individual LEDs are wired as segments of a digit and brightness of these individual LEDs can be controlled digitally. The maximum segment current for the display digits is set through a single external resistor. Individual digits may be addressed and updated without rewriting the entire display. Additionally it includes key scanning for an 8x2 key matrix which automatically scans a matrix of up to 16 switches. STLED316S supports numerictype displays and reduces the overall BOM costs through high integration. Also it provides ESD protection of greater than 2kV HBM. The LED controller/driver is ideal as a periphe
ral device to interface the display with a singlechip microcomputer.

Applications

Set Top Boxes White goods Home appliances DVD players, VCRs

Order codes
Part number STLED316SMTR Temperature range -65 to +150 C Package SO-24 Packaging 250 parts per reel

February 2007

Rev 1

1/4
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For further information contact your local STMicroelectronics sales office.