Datasheet
www.ti.com
PIN ASSIGNMENTS
6
12
18
24
1 2 3 4 5
7
8
9
10
11
1314151617
19
20
21
22
23
SDAT DS1 DS2 DM5ENASCLK
VIO
NC
GND
GND
NC
NC
DM1DM 2DM
3
DM4IS
GND
C1+
C2+
C2-
C1-
VOUT
VIN
QFN24-PINRTW
4mmx4mm
(TOP VIEW)
TPS60251
SLVS767C – APRIL 2007 – REVISED NOVEMBER 2007
ELECTRICAL CHARACTERISTICS (continued)
V
I
= 3.5 V, T
A
= – 40 ° C to 85 ° C, R
IS
= 562 k Ω , typical values are at T
A
= 25 ° C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
t
su(STO)
STOP condition setup time 600 ns
t
(BUF)
Bus free time 1300 ns
I
2
C COMPATIBLE INTERFACE VOLTAGE SPECIFICATION (SCLK, SDAT, VIO)
V
IO
Serial bus voltage level 1.4 4.5 V
V
IL
Low-leveI input voltage 3.0V ≤ V
I
≤ 6.0V, 1.4 V < V
IO
< 1.8 V 0 0.37 × V
IO
V
V
IH
High-level input voltage 3.0V ≤ V
I
≤ 6.0V 0.87 × V
IO
V
V
OL
Low-level output voltage I
LOAD
= 2 mA 0.4 V
TERMINAL FUNCTIONS
TERMINAL
I/O DESCRIPTION
NAME NO.
SCLK 1 I I
2
C Interface
SDAT 2 I/O I
2
C Interface
Hardware enable/disable pin. Connect this pin high to enable the device. Connect this pin low to disable
ENA 3 I
the device. Do not leave this pin unconnected.
DS1 4 I
Current sink input. Connect the cathode of one of the sub display white LEDs to this pin.
DS2 5 I
DM5 6 I Current sink input. Connect the cathode of the aux display or the 5th main display white LED to this pin.
I/O Voltage input (1.8V). Connect an input voltage supply of 1.8V to VIN to set the logic levels for the I
2
C
VIO 7 I
interface.
NC 8, 11, 12 – No connection
GND 9, 10, 18 – Ground
DM1 13 I
DM2 14 I
Current sink input. Connect the cathode of one of the main display white LED to this pin.
DM3 15 I
DM4 16 I
Maximum LED current setting input. Connect a resistor (R
IS
) between this pin and GND to set the full-scale
IS 17 I white LED current for sub (DS1, DS2), main (DM1, DM2, DM3, DM4), and DM5 LEDs. See the Setting the
LED Current section for details on selecting the correct value for R
IS
.
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