STLED316S_08 Datasheet, PDF (1/33 Pages) STMicroelectronics – Serial-interfaced 6-digit LED controller with keyscan

STLED316S
Serial-interfaced 6-digit LED controller with keyscan
Features
■ LED driver with 14 outputs
(8 segments/6 digits)
■ 40 mA load current capability for each segment
■ Output pins connected directly to the LEDs or
can be open-drain
■ Key-scanning (8 x 2 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
■ 5.0 V (± 10%) for V_CC
■ 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
Applications
■ Set-top-boxes
■ White goods
■ Home appliances
■ DVD players and VCRs
Table 1. Device summary
SO-24
Description
The STLED316S is a compact LED controller and
driver that interface microprocessors to LED
displays through a 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 re-
writing 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 numeric-
type displays and reduces the overall BOM costs
through high integration. Also it provides ESD
protection of greater than 4 kV HBM.
The LED controller/driver is ideal as a peripheral
device to interface the display with a singlechip
microcomputer.
Part number
Package
Packaging
STLED316SMTR
SO-24
Tape and reel
January 2008
Rev 1
1/33
www.st.com
33