STMicroelectronics STP16C596 Technical data

STP16C596

16-BIT CONSTANT CURRENT LED SINK DRIVER

■16 CONSTANT CURRENT OUTPUT CHANNELS

■ADJUSTABLE OUTPUT CURRENT THROUGH EXTERNAL RESISTOR

■SERIAL DATA IN/PARALLEL DATA OUT

■SERIAL OUT CHANGE STATE ON THE FALLING EDGES OF CLOCK

■OUTPUT CURRENT: 15-120 mA

■25 MHz CLOCK FREQ.

■AVAILABLE IN HIGH THERMAL TSSOP EXPOSED PAD

■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 falling 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.

Table 1: Order Codes

DIP-24

SO-24

TSSOP24	TSSOP24
	(exposed pad)

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.

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

July 2005	Rev. 8
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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 (Note 1)

Note 1: The exposed Pad is electrically not connected.

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		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	VDD			Supply voltage terminal

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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	1920		mA
fCLK	Clock Frequency	25		MHz
TOPR	Operating Temperature Range	-40 to +125		°C
TSTG	Storage Temperature Range	-65 to +150		°C

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

	Symbol	Parameter	DIP-24	SO-24	TSSOP24	TSSOP24 (*)	Unit
						(exposed pad)
	Rthj-amb	Thermal Resistance Junction-ambient	60	75	85	37.5	°C/W

(*) The exposed pad should be soldered directly to the PCB to realize the thermal benefits.

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	5		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 = 4.5 to 5.5V	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

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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	18.6	20.4	22.4	mA
IOL2		VO = 0.7V	REXT = 360 Ω	45.7	50.2	55.2	mA
∆IOL1	Output Current Error	VO = 0.7V	REXT = 910 Ω		± 3	± 4	%
	between bit (All Output ON)
∆IOL2		VO = 0.7V	REXT = 360 Ω		± 3	± 4	%
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 15 = OFF			0.3	0.6	mA
IDD(OFF2)		REXT = 470 Ω OUT 0 to 15 = OFF			5.5	7.7
IDD(OFF3)		REXT = 250 Ω OUT 0 to 15 = OFF			10.1	14.1
IDD(ON1)	Supply Current (ON)	REXT = 470 Ω OUT 0 to 15 = ON			5.5	7.7
IDD(ON2)		REXT = 250 Ω OUT 0 to 15 = ON			10.1	14.1

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
					REXT = 470 Ω	RL = 65 Ω
tPLH3		Prop		agation Delay Time,				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

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EQUIVALENT CIRCUIT OF INPUTS AND OUTPUTS

Figure 2: /OE Terminal

Figure 3: /LE Terminal

Figure 4: CLK, SDI Terminal

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Figure 5: SDO Terminal

Figure 6: Block Diagram

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