1/18
August 2004
s
16 CONSTANT CURRENT OUTPUT
CHANNELS
s
ADJUSTABLE OUTPUT CURRENT
THROUGH EXTERNAL RESISTOR
s
SERIAL DATA IN/PARALLEL DATA OUT
s
SERIAL OUT CHANGE STATE ON THE
FAILING EDGES OF CLOCK
s
OUTPUT CURRENT: 15-120 mA
s
25 MHz CLOCK FREQ.
s
AVAILABLE IN HIGH THERMAL TSSOP
EXPOSED PAD
s
EFFICIENCY PACKAGE
DESCRIPTION
The STP16C596 is a monolithic, medium-voltage,
low current power 16-bit shift register designed for
LED panel displays. The STP16C596 contains 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 are
designed to provide 15-120mA constant current to
drive the LEDs.
The serial output change state on the failing edges
of clock, this special feature will provide an
improved performance of the application when the
clock signal is skewed because the daisy chain is
too long.
Through an external resistor, users may adjust the
STP16C596 output current, controlling in this way
the light intensity of LEDs.
The STP16C596 guarantees a 16V output driving
capability, allowing users to connect more LEDs in
series. The high clock frequency, 25 MHz, also
satisfies the system demand for high volume data
transmission. Compared with 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
STP16C596B1R
DIP-24
15 parts per tube
STP16C596M
SO-24 (Tube)
40 parts per tube
STP16C596MTR
SO-24 (Tape & Reel)
1000 parts per reel
STP16C596TTR
TSSOP24 (Tape & Reel)
2500 parts per reel
STP16C596XTTR
TSSOP24 Exposed-Pad (Tape & Reel)
2500 parts per reel
STP16C596
16-BIT CONSTANT CURRENT LED SINK DRIVER
SO-24
TSSOP24
(exposed pad)
DIP-24
TSSOP24
Rev. 5
STP16C596
2/18
Table 2: Current Accuracy
Figure 1: Pin Connection
Table 3: Pin Description
Output Voltage
Current accuracy
Output Current
Between bits
Between ICs
0.7V
TYP. ± 3%
± 10%
15 to 120 mA
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
Input terminal of output enable (active low)
22
SDO
Serial data out terminal
23
R-EXT
Input terminal of an external resistor for constant current programing
24
V
DD
Supply voltage terminal
STP16C596
3/18
Table 4: Absolute Maximum Ratings
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Under these conditions, functional operation
is not implied.
Table 5: Thermal Data
Table 6: Recommended Operating Conditions
Symbol
Parameter
Value
Unit
V
DD
Supply Voltage
0 to 7
V
V
O
Output Voltage
-0.5 to 16
V
I
O
Output Current
120
mA
V
I
Input Voltage
-0.4 to V
DD
+0.4
V
I
GND
GND Terminal Current
1920
mA
f
CLK
Clock Frequency
25
MHz
T
OPR
Operating Temperature Range
-40 to +125
°C
T
STG
Storage Temperature Range
-65 to +150
°C
Symbol
Parameter
DIP-24
SO-24
TSSOP24
TSSOP24
(exposed pad)
Unit
R
thj-amb
Thermal Resistance Junction-ambient
60
75
85
37.5
°C/W
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
DD
Supply Voltage
4.5
5.0
5.5
V
V
O
Output Voltage
16.0
V
I
O
Output Current
OUTn
5
120
mA
I
OH
Output Current
SERIAL-OUT
+1
mA
I
OL
Output Current
SERIAL-OUT
-1
mA
V
IH
Input Voltage
0.7V
DD
V
DD
+0.3
V
V
IL
Input Voltage
-0.3
0.3V
DD
V
t
wLAT
/LE Pulse Width
V
DD
= 4.5 to 5.5V
20
ns
t
wCLK
CLK Pulse Width
20
ns
t
wEN
/OE Pulse Width
400
ns
t
SETUP(D)
Setup Time for DATA
20
ns
t
HOLD(D)
Hold Time for DATA
15
ns
t
SETUP(L)
Setup Time for LATCH
15
ns
f
CLK
Clock Frequency
Cascade Operation
25
MHz
STP16C596
4/18
Table 7: Electrical Characteristics (V
DD
=5V, T
= 25°C, unless otherwise specified.)
Table 8: Switching Characteristics (V
DD
=5V, T
= 25°C, unless otherwise specified.)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
IH
Input Voltage High Level
0.7V
DD
V
DD
V
V
IL
Input Voltage Low Level
GND
0.3V
DD
V
I
OH
Output Leakage Current
V
OH
= 16 V
10
µ
A
V
OL
Output Voltage (Serial-OUT) I
OL
= 1mA
0.4
V
V
OH
Output Voltage (Serial-OUT) I
OH
= -1mA
V
DD
-0.4V
V
I
OL1
Output Current
V
O
= 0.7V R
EXT
= 910
18.6
20.4
22.4
mA
I
OL2
V
O
= 0.7V R
EXT
= 360
45.7
50.2
55.2
mA
I
OL1
Output Current Error
between bit (All Output ON)
V
O
= 0.7V R
EXT
= 910
± 3
± 4
%
I
OL2
V
O
= 0.7V R
EXT
= 360
± 3
± 4
%
R
SIN(up)
Pull-up Resistor
150
300
600
K
R
SIN(down)
Pull-down Resistor
100
200
400
K
I
DD(OFF1)
Supply Current (OFF)
R
EXT
= OPEN OUT 0 to 15 = OFF
0.3
0.6
mA
I
DD(OFF2)
R
EXT
= 470
OUT 0 to 15 = OFF
5.5
7.7
I
DD(OFF3)
R
EXT
= 250
OUT 0 to 15 = OFF
10.1
14.1
I
DD(ON1)
Supply Current (ON)
R
EXT
= 470
OUT 0 to 15 = ON
5.5
7.7
I
DD(ON2)
R
EXT
= 250
OUT 0 to 15 = ON
10.1
14.1
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
t
PLH1
Propagation Delay Time,
CLK-OUTn, /LE = H, /OE = L
V
DD
= 5 V
V
IH
= V
DD
V
IL
= GND
C
L
= 13pF
I
O
= 40mA
V
L
= 3 V
R
EXT
= 470
R
L
= 65
200
280
ns
t
PLH2
Propagation Delay Time,
/LE-OUTn, /OE = L
160
250
ns
t
PLH3
Propagation Delay Time,
/OE-OUTn, /LE = H
145
200
ns
t
PLH
Propagation Delay Time,
CLK-SDO
15
30
ns
t
PHL1
Propagation Delay Time,
CLK-OUTn, /LE = H, /OE = L
15
30
ns
t
PHL2
Propagation Delay Time,
/LE-OUTn, /OE = L
15
30
ns
t
PHL3
Propagation Delay Time,
/OE-OUTn, /LE = H
45
60
ns
t
PHL
Propagation Delay Time,
CLK-SDO
15
300
ns
t
r
Output Rise Time
160
200
ns
t
f
Output Fall Time
15
25
ns
PDF 
ZIP