STP16CL596
LOW VOLTAGE 16-BIT CONSTANT
CURRENT LED SINK DRIVER
■ LOW VOLTAGE POWER SUPPLY DOWN T O
3V
■ 16 CONSTANT CURRENT OUTPUT
CHANNELS
■ ADJUST ABLE OUTPUT CURRENT
THROUGH EXTERNAL RESISTOR
■ SERIAL DATA IN/PARALLEL DATA OUT
■ SERIAL OUT CHANGES STATE ON THE
FALLING E DGES OF CLOCK
■ 3.3V MICRO DRIVER-ABLE
■ OUTPUT CURRENT: 15-90 mA
■ 25 MHz CLOCK FREQ.
■ A V AILABL E IN HIGH T HERMAL EFFI CIENCY
TSSOP EXPOSED PAD
DESCRIPTION
The STP16CL596 is a monolithic, low voltage, low
current power 16-bit shift register designed for
LED panel displays. The STP16CL 596 cont ains a
16-bit serial-in, parallel-out shift register that feeds
a 16-bitD-type storage register. In the output
stage, sixteen regulated current sources were
designed to provide 15-90m A constant current to
drive the LEDs.
Compared with the STPIC6C595, the device
provides great flexibility and improved
performance in LED panel system design.
DIP-24
TSSOP24
SO-24
TSSOP24
(exposed pad)
Trough an external resistor, users can adjust the
STP16CL596 output current, controlling in this
way the light intensity of LEDs.
The STP16CL596 guarantees a 16V output
driving capability, allowing users to connect more
LEDs in series. The high clock frequency, 25 MHz,
also satisfies the system requirement of high
volume data transmission. The 3.3V of voltage
supply is well useful for applications that in terface
any micro from 3.3V. Compared w ith a standard
TSSOP package, the TSSOP exposed pad
increases heat dissipation capability by a 2.5
factor.
Table 1: Order Codes
Part Number Package Comments
STP16CL596B1R DIP-24 15 parts per tube
STP16CL596M SO-24 (Tube) 40 parts per tube
STP16CL596MTR SO-24 (Tape & Reel) 1000 parts per reel
STP16CL596TTR TSSOP24 (Tape & Reel) 2500 parts per reel
STP16CL596XTTR TSSOP24 Exposed-Pad (Tape & Reel) 2500 parts per reel
Rev. 8
1/18July 2005
STP16CL596
Table 2: Current Accuracy
Output Voltage
Between bits Between ICs
≥ 0.7V ± 3% ± 10% 15 to 90 mA
Figure 1: Pin Connection (Note 1)
Current accuracy
Output Current
Note 1: The exposed Pad is electrica l l y not connecte d.
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
2/18
STP16CL596
Table 4: Absolute Maximum Ratings
Symbol Parameter Value Unit
V
V
I
V
I
GND
f
CLK
T
OPR
T
STG
Absolute Maximum Ratings are t hose values beyond whic h dam age to the devi ce may occu r. Under these conditions, functional operation
is not implied.
Table 5: Thermal Data
Supply Voltage
DD
Output Voltage
O
Output Current
O
Input Voltage -0.4 to VDD+0.4
I
GND Terminal Current
Clock Frequency
Operating Temperature Range
Storage Temperature Range
0 to 7 V
-0.5 to 16 V
90 mA
V
1440 mA
25 MHz
-40 to +125 °C
-65 to +150 °C
Symbol Parameter DIP-24 SO-24 TSSOP24
R
thj-amb
(*) The exposed pad should be soldered direct l y to the PCB to re al i ze the therma l benefits.
Thermal Resistance Junction-ambient
60 75 85 37.5 °C/W
TSSOP24 (*)
(exposed pad)
Table 6: Recommended Operating Conditions
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
Supply Voltage 3.0 3.3 3.6 V
DD
Output Voltage 16.0 V
O
Output Current OUTn 5 90 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
DD
/LE Pulse Width VDD = 3.0 to 3.6V 20 ns
CLK Pulse Width 20 ns
/OE Pulse Width 400 ns
Setup Time for DATA 20 ns
Hold Time for DATA 15 ns
Setup Time for LATCH 15 ns
Clock Frequency Cascade Operation 25 MHz
VDD+0.3 V
DD
Unit
V
3/18
STP16CL596
Table 7: Electrical Characteristics (VDD=3V, T = 25°C, unless otherwise specified.)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
V
I
V
V
I
OL1
I
OL2
∆I
∆I
R
SIN(up)
R
SIN(down)
I
DD(OFF1)
I
DD(OFF2)
I
DD(OFF3)
I
DD(ON1)
I
DD(ON2)
Input Voltage High Level 0.7V
IH
Input Voltage Low Level GND 0.3V
IL
Output Leakage Current VOH = 16 V 10 µA
OH
Output Voltage (Serial-OUT) IOL = 1mA 0.4 V
OL
Output Voltage (Serial-OUT) IOH = -1mA VDD-0.4V V
OH
Output Current VO = 0.7V R
Output Current Error
OL1
between bit (All Output ON)
OL2
VO = 0.7V R
VO = 0.7V R
VO = 0.7V R
= 910 Ω 19.2 20.6 22.0 mA
EXT
= 360 Ω 46.2 50.5 54.0 mA
EXT
= 910 Ω ± 4 ± 5 %
EXT
= 360 Ω ± 3 ± 4 %
EXT
DD
Pull-up Resistor 150 300 600 KΩ
Pull-down Resistor 100 200 400 KΩ
Supply Current (OFF) R
Supply Current (ON) R
= OPEN OUT 0 to 15 = OFF 0.3 0.6 mA
EXT
R
= 470 Ω OUT 0 to 15 = OFF 5.5 7.7
EXT
R
= 250 Ω OUT 0 to 15 = OFF 10.1 14.1
EXT
= 470 Ω OUT 0 to 15 = ON 5.5 7.7
EXT
R
= 250 Ω OUT 0 to 15 = ON 10.1 14.1
EXT
V
DD
DD
V
V
Table 8: Switching Characteristics (V
=3V, T = 25°C, unless otherwise specified.)
DD
Symbol Parameter Test Conditions Min. Typ. Max. Unit
t
PLH1
t
PLH2
t
PLH3
t
PLH
t
PHL1
t
PHL2
t
PHL3
t
PHL
Propagation Delay Time,
CLK-OUTn
, /LE = H, /OE = L
Propagation Delay Time,
-OUTn, /OE = L
/LE
Propagation Delay Time,
-OUTn, /LE = H
/OE
Propagation Delay Time,
CLK-SDO
Propagation Delay Time,
CLK-OUTn
, /LE = H, /OE = L
Propagation Delay Time,
-OUTn, /OE = L
/LE
Propagation Delay Time,
-OUTn, /LE = H
/OE
Propagation Delay Time,
CLK-SDO
t
Output Rise Time 200 250 ns
r
Output Fall Time 17 25 ns
t
f
V
= 3 V VIH = V
DD
DD
VIL = GND CL = 13pF
= 40mA VL = 3 V
I
O
= 470 Ω RL = 65 Ω
R
EXT
250 280 ns
220 250 ns
200 250 ns
25 50 ns
25 50 ns
25 50 ns
50 70 ns
25 50 ns
4/18
EQUIVALENT CIRCUIT OF INPUTS AND OUTPUTS
STP16CL596
Figure 2: /OE
Figure 3: /LE Terminal
Terminal
Figure 4: CLK, SDI Terminal
5/18
STP16CL596
Figure 5: SDO Terminal
Figure 6: Block Diagram
6/18
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