ST STP08CL596 User Manual

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STP08CL596

LOW VOLTAGE 8-BIT CONSTANT

CURRENT LED SINK DRIVER

■ LOW VOLTAGE POWER SUPPLY DOWN T O

3V

■ 8 CONSTANT CURRENT OUTPUT

CHANNELS

■ ADJUST ABLE OUTPUT CURRENT

THROUGH EXTERNAL RESISTOR

■ SERIAL DATA IN/PARALLEL DATA OUT

■ SERIAL OUT CHANGES STATE ON THE

FAILING EDGES 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 STP8CL596 is a monolithic, medium-voltage,
low current power 8-bit shift register designed for
LED panel display.

The STP8CL596 contains a 8-bit serial-in,
parallel-out shift register that feeds a 8-bitD-type
storage register. In the output stage, sixteen
regulated current sources were designed to
provide 15-90mA constant current to drive the
LEDs.

Compared with the STPIC6C595, the device
provides great flexibility and improved
performance in LED panel system design.

SO-16DIP-16

TSSOP16

Trough an external resistor, users m ay adjust the
STP8CL596 output current, controlling in this way
the light intensity of LEDs.
The STP8CL596 guarantees 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 interface any micro
from 3.3V to 5.5V. 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 Temp. Range Package Comments

STP08CL596B1 -40°C to 125°C DIP-16 25 part per tube

STP08CL596M -40°C to 125°C SO-16 (Tube) 50 parts per tube

STP08CL596MTR -40°C to 125°C SO-16 (Tape & Reel) 1000 parts per reel

STP08CL596TTR -40°C to 125°C TSSOP16 (Tape & Reel) 2500 parts per reel

Rev. 8

1/16February 2005

STP08CL596

Table 2: Current Accuracy

Output Voltage

≥ 0.7V ± 3% ± 10% 15 to 90 mA

Figure 1: Pin Con nection

Table 3: Pin Description

Current accuracy

Output Current

Between bits Between ICs

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

5-12 OUT 0-7 Output terminal

13 /OE

Output enable input terminal (active low)
14 SDO Serial data out terminal
15 R-EXT Constant Current programming
16 V

DD

5V Supply voltage terminal

Table 4: Absolute Maximum Ratings

Symbol Parameter Value Unit

V

I
f

T

T

V

I
V

GND

CLK

OPR
STG

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

720 mA

25 MHz

-40 to +125 °C

-65 to +150 °C

V

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is
not implied.

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STP08CL596

Table 5: Thermal Data

Symbol Parameter DIP-16 SO-16 TSSOP16 Unit

R

thj-amb

Table 6: Recommended Operating Conditions

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

DD

V

O

I

O

I

OH

I

OL

V

IH

V

IL

t

wLAT

t

wCLK

t

wEN

t

SETUP(D)

t

HOLD(D)

t

SETUP(L)

f

CLK

Thermal Resistance Junction-ambient

90 125 140 °C/W

Supply Voltage 3.0 3.3 3.6 V
Output Voltage 16.0 V
Output Current OUTn 15 120 mA
Output Current SERIAL-OUT +1 mA
Output Current SERIAL-OUT -1 mA
Input Voltage 0.7V

DD

Input Voltage -0.3 0.3V

VDD+0.3 V

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

V

Table 7: Electrical Characteristics (V

=3V, T = 25°C, unless otherwise specified.)

DD

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

IH

V

IL

I

OH

V

OL

V

OH

I

OL1

I

OL2

∆I

OL1

∆I

OL2

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

DD

Input Voltage Low Level GND 0.3V
Output Leakage Current VOH = 16 V 10 µA
Output Voltage (Serial-OUT) IOL = 1mA 0.4 V
Output Voltage (Serial-OUT) IOH = -1mA VDD-0.4V V
Output Current VO = 0.7V R

VO = 0.7V R

Output Current Error
between bit (All Output ON)

VO = 0.7V R
VO = 0.7V R

= 910 Ω 20.0 20.1 20.3 mA

EXT

= 360 Ω 49.7 50.2 50.7 mA

EXT

= 910 Ω ± 3 %

EXT

= 360 Ω ± 3 %

EXT

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 7 = OFF 0.3 0.6 mA

EXT

R

= 470 Ω OUT 0 to 7 = OFF 5.5 7.7

EXT

R

= 250 Ω OUT 0 to 7 = OFF 10.1 14.1

EXT

= 470 Ω OUT 0 to 7 = ON 5.5 7.7

EXT

R

= 250 Ω OUT 0 to 7 = ON 10.1 14.1

EXT

V

DD

DD

V
V

3/16

STP08CL596

Table 8: Switching Characteristics (VDD=3V, T = 25°C, unless otherwise specified.)

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

EQUIVALENT CIRCUIT OF INPUTS AND OUTPUTS
Figure 2: /OE

Terminal

4/16

Figure 3: /LE Terminal

Figure 4: CLK, SDI Terminal

STP08CL596

Figure 5: SDO Terminal

5/16