STLED325 Datasheet, PDF (1/62 Pages) STMicroelectronics – Standby power management to host

STLED325
I²C interfaced, advanced LED controller/driver with keyscan,
standby power management and real time clock (RTC)
Features
■ LED controller driver with 13 outputs
(8 segments/5 digits)
■ Standby power management to host
■ Integrated low-power, accurate RTC
■ Integrated remote control decoding:
– Philips (RC5, RCMM)
– Thomson (RCA, R2000)
– NEC and R-STEP
■ Wake-up using front panel keys, remote
control, real time clock (RTC), extra pin (AV or
CEC)
■ Battery or super-cap back up mode for real
time clock (RTC)
■ Keyscanning (8x2 matrix)
■ Low power consumption in standby mode
■ I²C serial bus interface (SCL, SDA)
■ 16-step dimming circuit to control the display
brightness
■ 5.0 V (± 10%) for V_CC
■ Built-in thermal protection circuit
■ External crystal with internal oscillator for real
time clock (RTC)
Applications
■ Set-top boxes
■ White goods
■ Home appliances
■ DVD players, VCRs, DVD-R
QFN32
(5 x 5 mm)
Description
The STLED325 is a compact LED controller/
driver that interfaces microprocessors to LED
displays through serial I²C interface. It drives
LEDs connected in common anode configuration
and includes keyscanning for an 8 x 2 key matrix
which automatically scans and de-bounces a
matrix of up to 16 switches.
Furthermore, the STLED325 provides standby
power management to the host. It also integrates
a low-power, highly-accurate RTC and a remote-
control decoder. All functions are programmable
using the I²C bus. Low power consumption during
standby mode is achieved.
The STLED325 controller/driver is ideal as a
single peripheral device to interface the front
panel display with a single-chip host IC like CPU.
Table 1. Device summary
Order code
Temp range (° C)
STLED325QTR
-40 to +85 °C
Package
QFN32
April 2011
Doc ID 17576 Rev 1
Comments
250 parts per reel
1/62
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