Page 1
Low voltage 16-bit constant current LED sink driver
Features
■ Low voltage power supply down to 3 V
■ 16 constant current output channels
■ Adjustable output current through external
resistor
■ Serial data IN / parallel data OUT
■ Auto power-saving feature minimizes the
quiescent current if no active data is detected
on the latches
■ Can be driven by a 3.3 V microcontroller
■ Output current: 5-100 mA
■ Max clock frequency 30 MHz
■ ESD protection 2.5 kV HBM, 200 V MM
STP16CPS05
with auto power saving
QSOP-24
TSSOP24
SO-24
TSSOP24
(exposed pad)
Description
The STP16CPS05 is a monolithic, low voltage,
low current power 16-bit shift register designed for
LED panel displays. The STP16CPS05 contains a
16-bit serial-in, parallel-out shift register that
feeds a 16-bit, D-type storage register. In the
output stage, sixteen regulated current sources
provide from 5 mA to 100 mA constant current to
drive the LEDs.
The auto power shut-down and auto power-ON
feature allows the device to save power without
any external intervention.
Table 1. Device summary
Order codes Package Packaging
STP16CPS05MTR SO-24 1000 parts per reel
STP16CPS05TTR TSSOP24 2500 parts per reel
STP16CPS05XTTR TSSOP24 Exposed Pad 2500 parts per reel
The output current setup time is 40 ns (typ), thus
improving the system performance.
The LEDs' brightness can be controlled by using
an external resistor to adjust the STP16CPS05
output current.
The STP16CPS05 guarantees a 20 V output
driving capability, allowing users to connect more
LEDs in series. The high clock frequency,
30 MHz, makes the device suitable for high data
rate transmission. The 3.3 V voltage supply is
useful in applications that interface with a 3.3 V
microcontroller.
STP16CPS05PTR QSOP-24 2500 parts per reel
January 2010 Doc ID 12569 Rev 6 1/27
www.st.com
27
Page 2
Contents STP16CPS05
Contents
1 Summary description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Pin connection and description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.3 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4 Equivalent circuit and outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5 Timing diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6 Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7 Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
2/27 Doc ID 12569 Rev 6
Page 3
STP16CPS05 Summary description
1 Summary description
Table 2. Typical current accuracy
Output voltage
Current accuracy
Output current
Between bits Between ICs
V
DD
Temperature
≥ 1.3 V ± 1.5 % ± 5 %
1.1 Pin connection and description
Figure 1. Pin connection
≥ 20 to 100 mA
3.3 V to 5 V 25 °C
Note: The exposed pad should be electrically connected to a metal land electrically isolated or
connected to GND
Table 3. Pin description
Pin N° Symbol Name and function
1 GND Ground terminal
2 SDI Serial data input terminal
3 CLK Clock input terminal
4 LE Latch input terminal
5-20 OUT 0-15 Output terminal
21 OE
22 SDO Serial data out terminal
23 R-EXT Input terminal of an external resistor for constant current programing
24 V
DD
Input terminal of output enable (active low)
Supply voltage terminal
Doc ID 12569 Rev 6 3/27
Page 4
Electrical ratings STP16CPS05
2 Electrical ratings
2.1 Absolute maximum ratings
Stressing the device above the rating listed in the “absolute maximum ratings” table may
cause permanent damage to the device. These are stress ratings only and operation of the
device at these or any other conditions above those indicated in the Operating sections of
this specification is not implied. Exposure to Absolute Maximum Rating conditions for
extended periods may affect device reliability.
Table 4. Absolute maximum ratings
Symbol Parameter Value Unit
V
DD
V
I
O
V
I
GND
f
CLK
T
1. Such absolute value is achieved according the thermal shutdown
Supply voltage 0 to 7 V
Output voltage -0.5 to 20 V
O
Output current 100 mA
Input voltage -0.4 to V
I
GND terminal current 1600 mA
Clock frequency 50 MHz
Junction temperature range
J
2.2 Thermal data
Table 5. Thermal data
Symbol Parameter Value Unit
T
T
R
OPR
STG
thJA
Operating temperature range -40 to +125 °C
Storage temperature range -55 to +150 °C
Thermal resistance junction
(1)
(1)
DD
-40 to+170 °C
SO-24 42.7 °C/W
TSSOP24 55 °C/W
(2)
TSSOP24
Exposed Pad
37.5 °C/W
QSOP-24 55 °C/W
V
1. According to jedec standard 51-7B
2. The exposed pad should be soldered directly to the PCB to realize the thermal benefits.
4/27 Doc ID 12569 Rev 6
Page 5
STP16CPS05 Electrical ratings
2.3 Recommended operating conditions
Table 6. Recommended operating conditions at 25 °C
Symbol Parameter Test conditions Min Typ Max Unit
V
V
I
I
V
V
t
wLAT
t
wCLK
t
wEN
t
SETUP(D)
t
HOLD(D)
t
SETUP(L)
f
CLK
1. If the device is connected in cascade, it may not be possible achieve the maximum data transfer. Please
considered the timings carefully.
Supply voltage 3.0 5.5 V
DD
Output voltage 20 V
O
Output current OUTn 5 100 mA
I
O
Output current SERIAL-OUT +1 mA
OH
Output current SERIAL-OUT -1 mA
OL
Input voltage 0.7V
IH
Input voltage -0.3 0.3V
IL
LE pulse width
DD
10 ns
CLK pulse width 8 ns
OE pulse width 100 ns
VDD = 3.3 V to 5.0 V
Setup time for DATA 14 ns
Hold time for DATA 5 ns
Setup time for LATCH 15 ns
Clock frequency Cascade operation
(1)
V
DD
DD
30 MHz
V
V
Doc ID 12569 Rev 6 5/27
Page 6
Electrical characteristics STP16CPS05
3 Electrical characteristics
Table 7. Electrical characteristics (V
specified)
Symbol Parameter Test conditions Min Typ Max Unit
= 3.3 V to 5 V, T = 25 °C, unless otherwise
DD
V
V
I
OH
V
V
I
OL1
OL2
I
OL3
ΔI
OL1
OL2
ΔI
OL3
R
SIN(up)
R
SIN(down)
I
DD(SH)
I
DD(OFF1)
Input voltage high level 0.7V
IH
Input voltage low level GND 0.3V
IL
DD
Output leakage current VOH = 20 V 10 μA
Output voltage
OL
(Serial-OUT)
Output voltage
OH
(Serial-OUT)
Output current
Output current error
between bit
(All Output ON)
= 1 mA 0.4 V
I
OL
= -1 mA VDD-0.4V V
I
OH
= 0.3 V, R
V
O
VO = 0.3 V, R
VO = 1.3 V, R
= 0.3 VR
V
O
VO = 0.3 VR
VO = 1.3 VR
= 3.9 kΩ 4.25 5 5.75
ext
= 970 Ω 19 20 21
ext
= 190 Ω 96 100 104
ext
= 3.9 kΩ ± 5 ± 8
EXT
= 970 Ω ± 1.5 ± 3
EXT
=190 Ω ± 1.2 ± 3
EXT
Pull-up resistor 150 300 600 kΩ
Pull-down resistor 100 200 400 kΩ
= 3.3 V 120 170 μA
V
Shut-down current
All Latched Data = L
DD
= 5 V 140 200 μA
V
DD
R
= 970
EXT
OUT 0 to 15 = OFF
5
V
DD
DD
Supply current (OFF)
I
DD(OFF2)
I
DD(ON1)
EXT
OUT 0 to 15 = OFF
R
= 970
EXT
OUT 0 to 15 = ON
12.5
5.5
R
= 240
Supply current (ON)
R
= 240
I
DD(ON2)
EXT
OUT 0 to 15 = ON
13
Thermal Thermal protection 170 °C
V
V
mAI
%ΔI
mA
6/27 Doc ID 12569 Rev 6
Page 7
STP16CPS05 Electrical characteristics
Table 8. Switching characteristics (V
= 3.3 to 5 V, T = 25 °C)
DD
Symbol Parameter Test conditions Min Typ Max Unit
V
= 3.3 V 35 55
t
PLH1
t
PLH2
t
PLH3
t
Propagation delay time,
CLK-OUTn
Propagation delay time,
LE-OUTn, OE = L
Propagation delay time,
OE-OUTn, LE = H
Propagation delay time,
PLH
CLK-SDO
, LE = H, OE = L
Propagation delay time,
t
PHL1
t
PHL2
t
PHL3
t
CLK-OUTn, LE = H,
= L
OE
Propagation delay time,
LE-OUTn
Propagation delay time,
OE-OUTn, LE = H
Propagation delay time,
PHL
CLK-SDO
, OE = L
V
= V
IH
DD
VIL = GND CL = 10 pF
= 20 mA VL = 3.0 V
I
O
R
= 1 KΩ RL = 60 Ω
EXT
Output rise time
t
10~90 % of voltage
ON
waveform
Output fall time
t
90~10 % of voltage
OFF
waveform
CLK rise time
t
r
t
CLK fall time
f
1. In order to achieve high cascade data transfer, please consider tr/tf timings carefully.
(1)
(1)
DD
= 5 V 17.5 26
V
DD
= 3.3 V 33.5 52
V
DD
= 5 V 17 20
V
DD
= 3.3 V 53.5 84.5
V
DD
= 5 V 28.5 40.5
V
DD
= 3.3 V 19 27.5
V
DD
= 5 V 13 18.5
V
DD
V
= 3.3 V 13 19
DD
= 5 V 8.5 12
V
DD
VDD = 3.3 V 10 14.5
= 5 V 6.5 9
V
DD
= 3.3 V 10.5 15
V
DD
= 5 V 7.5 10.5
V
DD
= 3.3 V 23 33
V
DD
= 5 V 15.5 21.5
V
DD
VDD = 3.3 V 23.5 31.5
= 5 V 9 10.5
V
DD
VDD = 3.3 V 4.6 5.5
= 5 V 3.5 5
V
DD
5000 ns
5000 ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Doc ID 12569 Rev 6 7/27
Page 8
Equivalent circuit and outputs STP16CPS05
4 Equivalent circuit and outputs
Figure 2. OE terminal
Figure 3. LE terminal
Figure 4. CLK, SDI terminal
8/27 Doc ID 12569 Rev 6
Page 9
STP16CPS05 Equivalent circuit and outputs
Figure 5. SDO terminal
Figure 6. Block diagram
Doc ID 12569 Rev 6 9/27
Page 10
Timing diagrams STP16CPS05
5 Timing diagrams
Table 9. Truth table
CLOCK LE OE
H L Dn Dn ..... Dn - 7 ..... Dn -15 Dn - 15
L L Dn + 1 No change Dn - 14
H L Dn + 2 Dn + 2 ..... Dn - 5 ..... Dn -13 Dn - 13
X L Dn + 3 Dn + 2 ..... Dn - 5 ..... Dn -13 Dn - 13
X H Dn + 3 OFF Dn - 13
SERIAL-
IN
OUT0
............. OUT7 ................ OUT15 SDO
Note: OUTn = ON when Dn = H OUTn = OFF when Dn = L
Figure 7. Timing diagram
Note: 1 Latch and output enable terminals are Level-sensitive and are not synchronized with rising
or falling edge of CLK signal
2 When LE terminal is at low level, the latch circuit holds previous set of data
3 When LE terminal is at high level, the latch circuit refreshes new set of data from SDI chain
4 When OE
is at low level the output terminals Out 0 to Out 15 respond to data in the latch
circuits, either '1' for ON or '0' for OFF.
5 When OE
10/27 Doc ID 12569 Rev 6
is at high level, all output terminals are switched OFF.
Page 11
STP16CPS05 Timing diagrams
Table 10. Enable IO: shut-down truth table
CLOCK LE SDI0 ........... SDI7 ............ SDI
H All = L Active Not active OFF
L No change No change No change No change
H One or more = H Not active Active X
15
Note: At the power-up the device starts in shut-down mode.
Figure 8. Clock, serial-in, serial-out
SH
Auto
Power-up
OUTn
Doc ID 12569 Rev 6 11/27
Page 12
Timing diagrams STP16CPS05
Figure 9. Clock, serial-in, latch, enable, outputs
Figure 10. Outputs
12/27 Doc ID 12569 Rev 6
Page 13
STP16CPS05 Typical characteristics
6 Typical characteristics
Figure 11. Output current-R
Table 11. Output current-R
Rext (Ω) Output current (mA)
976 20
780 25
652 30
560 35
488 40
433 45
389 50
354 55
325 60
300 65
278 70
259 75
241 80
229 85
215 90
EXT
EXT
resistor
resistor
Doc ID 12569 Rev 6 13/27
Page 14
Typical characteristics STP16CPS05
Figure 12. Output current vs ± ΔIOL(%)
Figure 13. I
vs drop out voltage (V
SET
drop
)
14/27 Doc ID 12569 Rev 6
Page 15
STP16CPS05 Typical characteristics
Figure 14. I
Figure 15. Auto power saving
ON\OFF
DD
14
12
10
8
6
4
2
0
0 20 406080100
Idd ON @3.3V
Idd ON @ 5.0V
Idd OFF @3.3V
Idd OFF @5.0V
Electrical Condition:
Ta = 25°C
VDD = 3.3V; 5.0V
VIN = VDD
Note: Auto power-saving feature minimizes the quiescent current if no active data is detected on
the latches and auto-power-up the device at fist active data latched.
Doc ID 12569 Rev 6 15/27
Page 16
Typical characteristics STP16CPS05
Figure 16. First output ON after switching from auto power saving to normal mode
operating condition
Note: When the device goes from auto power saving to normal operative condition, the first output
that switch ON shows TON condition as seen in the plot above.
16/27 Doc ID 12569 Rev 6
Page 17
STP16CPS05 Test circuit
7 Test circuit
Figure 17. DC characteristic
Figure 18. AC characteristic
Doc ID 12569 Rev 6 17/27
Page 18
Test circuit STP16CPS05
Figure 19. Typical application schematic
C = 10μF
+
Note: V
will be determined by the VF of the LEDs
L
Table 12. Turn ON output current
characteristics
(1)
Table 13. Turn OFF output current
characteristics
(2)
1. Reference level for the TON characteristics is 50% of OE signal to 90% of output current
2. Reference level for the T
characteristics is 50% of OE signal to 10% of output current
OFF
18/27 Doc ID 12569 Rev 6
Page 19
STP16CPS05 Package mechanical data
8 Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK
®
packages, depending on their level of environmental compliance. ECOPACK®
®
is an ST trademark.
Table 14. QSOP-24 mechanical data
mm. inch
Dim.
Min Typ Max Min Typ Max
A 1.54 1.62 1.73 0.061 0.064 0.068
A1 0.1 0.15 0.25 0.004 0.006 0.010
A2 1.47 0.058
b 0.31 0.2 0.012 0.008
c 0.254 0.17 0.010 0.007
D 8.56 8.66 8.76 0.337 0.341 0.345
E 5.8 6 6.2 0.228 0.236 0.244
E1 3.8 3.91 4.01 0.150 0.154 0.158
e 0.635 0.025
L 0.4 0.635 0.89 0.016 0.025 0.035
h 0.25 0.33 0.41 0.010 0.013 0.016
< 8° 0°
Doc ID 12569 Rev 6 19/27
Page 20
Package mechanical data STP16CPS05
Figure 20. QSOP-24 package dimensions
20/27 Doc ID 12569 Rev 6
Page 21
STP16CPS05 Package mechanical data
Table 15. TSSOP24 mechanical data
mm. inch
Dim.
Min Typ Max Min Typ Max
A 1.1 0.043
A1 0.05 0.15 0.002 0.006
A2 0.9 0.035
b 0.19 0.30 0.0075 0.0118
c 0.09 0.20 0.0035 0.0079
D 7.7 7.9 0.303 0.311
E 4.3 4.5 0.169 0.177
e 0.65 BSC 0.0256 BSC
H 6.25 6.5 0.246 0.256
K 0° 8° 0° 8°
L 0.50 0.70 0.020 0.028
Figure 21. TSSOP24 package dimensions
Doc ID 12569 Rev 6 21/27
Page 22
Package mechanical data STP16CPS05
Table 16. Tape and reel TSSOP24
mm. inch
Dim.
Min Typ Max Min Typ Max
A 330 2.992
C 12.8 13.2 0.504 0.519
D 20.2 0.795
N 60 2.362
T 22.4 0.882
Ao 6.8 7 0.268 0.276
Bo 8.2 8.4 0.323 0.331
Ko 1.7 1.9 0.067 0.075
Po 3.9 4.1 0.153 0.161
P 11.9 12.1 0.468 0.476
Figure 22. Reel dimensions
22/27 Doc ID 12569 Rev 6
Page 23
STP16CPS05 Package mechanical data
Table 17. SO-24 mechanical data
mm. inch
Dim.
Min Typ Max Min Typ Max
A 2.65 0.104
a1 0.1 0.2 0.004 0.008
a2 2.45 0.096
b 0.35 0.49 0.014 0.019
b1 0.23 0.32 0.009 0.012
C 0.5 0.020
c1 45°(typ.)
D 15.20 15.60 0.598 0.614
E 10.00 10.65 0.393 0.419
e 1.27 0.050
e3 13.97 0.550
F 7.40 7.60 0.291 0.300
L 0.50 1.27 0.020 0.050
S °(max.) 8
Figure 23. SO-24 package dimensions
Doc ID 12569 Rev 6 23/27
Page 24
Package mechanical data STP16CPS05
Table 18. Tape and reel SO-24
mm. inch
Dim.
Min Typ Max Min Typ Max
A 330 12.992
C 12.8 13.2 0.504 0.519
D 20.2 0.795
N 60 2.362
T 30.4 1.197
Ao 10.8 11.0 0.425 0.433
Bo 15.7 15.9 0.618 0.626
Ko 2.9 3.1 0.114 0.122
Po 3.9 4.1 0.153 0.161
P 11.9 12.1 0.468 0.476
Figure 24. Reel dimensions
24/27 Doc ID 12569 Rev 6
Page 25
STP16CPS05 Package mechanical data
Table 19. TSSOP24 exposed pad
mm inch
Dim.
Min Typ Max Min Typ Max
A 1.2 0.047
A1 0.15 0.004 0.006
A2 0.8 1 1.05 0.031 0.039 0.041
b 0.19 0.30 0.007 0.012
c 0.09 0.20 0.004 0.0089
D 7.7 7.8 7.9 0.303 0.307 0.311
D1 4.7 5.0 5.3 0.185 0.197 0.209
E 6.2 6.4 6.6 0.244 0.252 0.260
E1 4.3 4.4 4.5 0.169 0.173 0.177
E2 2.9 3.2 3.5 0.114 0.126 0.138
e 0.65 0.0256
K 0° 8° 0° 8°
L 0.45 0.60 0.75 0.018 0.024 0.030
Figure 25. TSSOP24 dimensions
Doc ID 12569 Rev 6 25/27
Page 26
Revision history STP16CPS05
9 Revision history
Table 20. Document revision history
Date Revision Changes
28-Jul-2006 1 First release
22-Dec-2006 2 Final datasheet
17-May-2007 3 Updated Table 8 on page 7
10-Jul-2007 4 Updated Table 9: Truth table on page 10
Updated Table 19: TSSOP24 exposed pad on page 25
28-Feb-2008 5
19-Jan-2010 6 Updated Table 6 on page 5
Added QSOP-24 package information Ta bl e 1 4 and Figure 20
on page 20
26/27 Doc ID 12569 Rev 6
Page 27
STP16CPS05
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Doc ID 12569 Rev 6 27/27
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