ST STP08C596 User Manual

STP08C596

STP08C596

8-BIT CONSTANT CURRENT LED SINK DRIVER

■8 CONSTANT CURRENT OUTPUT CHANNELS

■ADJUSTABLE OUTPUT CURRENT THROUGH EXTERNAL RESISTOR

■SERIAL DATA IN/PARALLEL DATA OUT

■SERIAL OUT CHANGE STATE ON THE FAILING EDGES OF CLOCK

■OUTPUT CURRENT: 15-120 mA

■25 MHz CLOCK FREQ.

■AVAILABLE IN HIGH THERMAL TSSOP EXPOSED PAD

■EFFICIENCY PACKAGE

DESCRIPTION

The STP08C596 is a monolithic, medium-voltage, low current power 8-bit shift register designed for LED panel display. The STP08C596 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 15-120mA constant current to drive the LEDs.

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

Table 1: Order Codes

DIP-16

SO-16

TSSOP16

Trough an external resistor, users may adjust the STP08C596 output current, controlling in this way the light intensity of LEDs.

The STP08C596 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.

Part Number	Temp. Range	Package	Comments
STP08C596B1	-40°C to 125°C	DIP-16	25 part per tube
STP08C596M	-40°C to 125°C	SO-16 (Tube)	50 parts per tube
STP08C596MTR	-40°C to 125°C	SO-16 (Tape & Reel)	1000 parts per reel
STP08C596TTR	-40°C to 125°C	TSSOP16 (Tape & Reel)	2500 parts per reel

February 2005	Rev. 7
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Table 2: Current Accuracy

Output Voltage		Current accuracy		Output Current
	Between bits		Between ICs
≥ 0.7V	TYP. ± 3%		± 10%	15 to 120 mA

Figure 1: Pin Connection

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
5-12	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	VDD	5V Supply voltage terminal
Table 4: Absolute Maximum Ratings

Symbol	Parameter	Value	Unit
VDD	Supply Voltage	0 to 7	V
VO	Output Voltage	-0.5 to 16	V
IO	Output Current	120	mA
VI	Input Voltage	-0.4 to VDD+0.4	V
IGND	GND Terminal Current	980	mA
fCLK	Clock Frequency	25	MHz
TOPR	Operating Temperature Range	-40 to +125	°C
TSTG	Storage Temperature Range	-55 to +150	°C

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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Table 5: Thermal Data

Symbol	Parameter	DIP-16	SO-16	TSSOP16	Unit
Rthj-amb	Thermal Resistance Junction-ambient	90	125	140	°C/W

Table 6: Recommended Operating Conditions

Symbol	Parameter	Test Conditions	Min.	Typ.	Max.	Unit
VDD	Supply Voltage		4.5	5.0	5.5	V
VO	Output Voltage				16.0	V
IO	Output Current	OUTn	15		120	mA
IOH	Output Current	SERIAL-OUT			+1	mA
IOL	Output Current	SERIAL-OUT			-1	mA
VIH	Input Voltage		0.7VDD		VDD+0.3	V
VIL	Input Voltage		-0.3		0.3VDD	V
twLAT	/LE Pulse Width	VDD = 3.0 to 3.6V	20			ns
twCLK	CLK Pulse Width		20			ns
twEN	/OE Pulse Width		400			ns
tSETUP(D)	Setup Time for DATA		20			ns
tHOLD(D)	Hold Time for DATA		15			ns
tSETUP(L)	Setup Time for LATCH		15			ns
fCLK	Clock Frequency	Cascade Operation			25	MHz

Table 7: Electrical Characteristics (VDD=5V, T = 25°C, unless otherwise specified.)

Symbol	Parameter	Test Conditions			Min.	Typ.	Max.	Unit
VIH	Input Voltage High Level				0.7VDD		VDD	V
VIL	Input Voltage Low Level				GND		0.3VDD	V
IOH	Output Leakage Current	VOH = 16 V					10	µA
VOL	Output Voltage (Serial-OUT)	IOL = 1mA					0.4	V
VOH	Output Voltage (Serial-OUT)	IOH = -1mA			VDD-0.4V			V
IOL1	Output Current	VO = 0.7V	REXT = 910 Ω		20.6	20.7	20.9	mA
IOL2		VO = 0.7V	REXT = 360 Ω		50.6	51.0	51.5	mA
∆IOL1	Output Current Error	VO = 0.7V	REXT = 910 Ω				± 3	%
	between bit (All Output ON)
∆IOL2		VO = 0.7V	REXT = 360 Ω				± 3	%
RSIN(up)	Pull-up Resistor				150	300	600	KΩ
RSIN(down)	Pull-down Resistor				100	200	400	KΩ
IDD(OFF1)	Supply Current (OFF)	REXT = OPEN		OUT 0 to 7 = OFF		0.3	0.6	mA
IDD(OFF2)		REXT = 470 Ω OUT 0 to 7 = OFF				5.5	7.7
IDD(OFF3)		REXT = 250 Ω OUT 0 to 7 = OFF				10.1	14.1
IDD(ON1)	Supply Current (ON)	REXT = 470 Ω		OUT 0 to 7 = ON		5.5	7.7
IDD(ON2)		REXT = 250 Ω OUT 0 to 7 = ON				10.1	14.1

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Table 8: Switching Characteristics (VDD=5V, T = 25°C, unless otherwise specified.)

Symbol				Parameter	Test Conditions		Min.	Typ.	Max.	Unit
tPLH1	Propagation Delay Time,				VDD = 5 V	VIH = VDD		200	280	ns
	CLK-OUTn, /LE = H, /OE = L				VIL = GND	CL = 13pF
tPLH2		Propagation Delay Time,						160	250	ns
					IO = 40mA	VL = 3 V
	/LE-OUTn, /OE = L
tPLH3		Prop		agation Delay Time,	REXT = 470 Ω	RL = 65 Ω		145	200	ns
	/OE-OUTn, /LE = H
tPLH	Propagation Delay Time,							15	30	ns
	CLK-SDO
tPHL1	Propagation Delay Time,							15	30	ns
	CLK-OUTn, /LE = H, /OE = L
tPHL2		Propagation Delay Time,						15	30	ns
	/LE-OUTn, /OE = L
tPHL3		Prop		agation Delay Time,				45	60	ns
	/OE-OUTn, /LE = H
tPHL	Propagation Delay Time,							15	300	ns
	CLK-SDO
tr	Output Rise Time							160	200	ns
tf	Output Fall Time							15	25	ns

EQUIVALENT CIRCUIT OF INPUTS AND OUTPUTS

Figure 2: /OE Terminal

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Figure 3: /LE Terminal

Figure 4: CLK, SDI Terminal

Figure 5: SDO Terminal

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