Data Sheet
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TLC5940
SLVS515C – DECEMBER 2004 – REVISED OCTOBER 2007
TERMINAL FUNCTION
TERMINAL
NO. I/O DESCRIPTION
NAME
DIP PWP RHB
Blank all outputs. When BLANK = H, all OUTn outputs are forced OFF. GS counter is also
BLANK 23 2 31 I
reset. When BLANK = L, OUTn are controlled by grayscale PWM control.
Switch DC data input. When DCPRG = L, DC is connected to EEPROM. When DCPRG = H,
DC is connected to the DC register.
DCPRG 19 26 25 I
DCPRG also controls EEPROM writing, when VPRG = V
(PRG)
. EEPROM data = 3Fh (default)
GND 22 1 30 G Ground
GSCLK 18 25 24 I Reference clock for grayscale PWM control
IREF 20 27 26 I Reference current terminal
12, 13,
NC – – No connection
28, 29
OUT0 28 7 4 O Constant current output
OUT1 1 8 5 O Constant current output
OUT2 2 9 6 O Constant current output
OUT3 3 10 7 O Constant current output
OUT4 4 11 8 O Constant current output
OUT5 5 12 9 O Constant current output
OUT6 6 13 10 O Constant current output
OUT7 7 14 11 O Constant current output
OUT8 8 15 14 O Constant current output
OUT9 9 16 15 O Constant current output
OUT10 10 17 16 O Constant current output
OUT11 11 18 17 O Constant current output
OUT12 12 19 18 O Constant current output
OUT13 13 20 19 O Constant current output
OUT14 14 21 20 O Constant current output
OUT15 15 22 21 O Constant current output
SCLK 25 4 1 I Serial data shift clock
SIN 26 5 2 I Serial data input
SOUT 17 24 23 O Serial data output
VCC 21 28 27 I Power supply voltage
Multifunction input pin. When VPRG = GND, the device is in GS mode. When VPRG = V
CC
, the
VPRG 27 6 3 I device is in DC mode. When VPRG = V
(VPRG)
, DC register data can programmed into DC
EEPROM with DCPRG=HIGH. EEPROM data = 3Fh (default)
XERR 16 23 22 O Error output. XERR is an open-drain terminal. XERR goes L when LOD or TEF is detected.
Level triggered latch signal. When XLAT = high, the TLC5940 writes data from the input shift
XLAT 24 3 32 I register to either GS register (VPRG = low) or DC register (VPRG = high). When XLAT = low,
the data in GS or DC register is held constant.
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Product Folder Link(s): TLC5940