SGS Thomson Microelectronics ST3222ECTR, ST3222ECPR, ST3222ECDR, ST3222ECD, ST3222EBTR Datasheet

ST3222E

±15KV ESD-PROTECTED, 3 TO 5.5V, LOW POWER, UP TO 250KBPS, RS-232 DRIVERS AND RECEIVERS

■ESD PROTECTIO FOR RS-232 I/O PINS ±15KV HUMAN BODY MODEL

±8KV IEC 1000-4-2 CONTACT DISCHARGE

■300μA SUPPLY CURRENT

■250Kbps MINIMUM GUARENTEED DATA RATE

■6V/μs MINIMUM GUARANTEED SLEW RATE

■MEET EIA/TIA-232 SPECIFICATIONS DOWN TO 3V

■AVAILABLE IN SO-18, SSOP20 AND TSSOP20

DESCRIPTION

The ST3222E is a 3V powered EIA/TIA-232 and V.28/V.24 communications interface with low power requirements, high data-rate capabilities and enhanced electrostatic discharge (ESD) protection to ±8kV using IEC1000-4-2 Contact Discharge and ±15kV using the Human Body Model. ST3222E has a proprietary low dropout transmitter output stage providing true RS-232 performance from 3 to 5V supplies with a dual charge pump. The charge pump requires only four small 0.1mF external capacitors for operation form 3V supply.

The device has two receivers and two drivers. The ST3222E features a 1μA shutdown mode that reduces power consumption and extends battery life in portable systems. Its receivers can remain active in shutdown mode, allowing external

ORDERING CODES

SOP

SSOP

TSSOP

devices such as modems to be monitored using only 1μA supply current.

The device is guaranteed to run at data rates of 250Kbps while maintaining RS-232 output levels. Typical applications are Notebook, Subnotebook and Palmtop Computers, Battery Powered Equipment, Hand-Held Equipment, Peripherals and Printers.

	Type	Temperature	Package	Comments
		Range
	ST3222ECD	0 to 70 °C	SO-18 (Tube)	50parts per tube / 20tube per box
	ST3222EBD	-40 to 85 °C	SO-18 (Tube)	50parts per tube / 20tube per box
	ST3222ECDR	0 to 70 °C	SO-18 (Tape & Reel)	1000 parts per reel
	ST3222EBDR	-40 to 85 °C	SO-18 (Tape & Reel)	1000 parts per reel
	ST3222ECPR	0 to 70 °C	SSOP20 (Tape & Reel)	1350 parts per reel
	ST3222EBPR	-40 to 85 °C	SSOP20 (Tape & Reel)	1350 parts per reel
	ST3222ECTR	0 to 70 °C	TSSOP20 (Tape & Reel)	2500 parts per reel
	ST3222EBTR	-40 to 85 °C	TSSOP20 (Tape & Reel)	2500 parts per reel
	March 2003			1/10

ST3222E

PIN CONFIGURATION

SO-18

SSOP20/TSSOP20

PIN DESCRIPTION

	PlN N°	PlN N°	SYMBOL					NAME AND FUNCTION
	(SO-18)	(SSOP20 TSSP20)
	1	1			EN			Receiver Enable Control. Drive low for normal
								operation. Drive high to force the receivers outputs
								(R_OUT) into a high-impedance state.
	2	2		C1+				Positive Terminal for the first Charge Pump
								Capacitor
	3	3			V+			5.5V Generated By The Charge Pump.
	4	4		C1-				Negative Terminal for the first Charge Pump
								Capacitor
	5	5		C2+				Positive Terminal for the second Charge Pump
								Capacitor
	6	6		C2-				Negative Terminal for the second Charge Pump
								Capacitor
	7	7			V-			-5.5V Generated By The Charge Pump.
	8	8	T2OUT					Second Transmitter Output Voltage
	9	9		R2IN				Second Receiver Input Voltage
	10	10	R2OUT					Second Receiver Output Voltage
		11		NC				Not Connected
	11	12		T2IN				Second Transmitter Input Voltage
	12	13		T1IN				First Transmitter Input Voltage
		14		NC				Not Connected
	13	15	R1OUT					First Receiver Output Voltage
	14	16		R1IN				First Receiver Input Voltage
	15	17	T1OUT					First Transmitter Output Voltage
	16	18		GND				Ground
	17	19		VCC				Supply Voltage
	18	20		SHDN				Active Low Shutdown Control Input. Drive Low To
								Shut-down Transmittes And Charge Pump

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					ST3222E
ABSOLUTE MAXIMUM RATINGS
Symbol			Parameter	Value	Unit
	VCC		Supply Voltage	-0.3 to 6	V
	V+		Doubled Voltage Terminal	(VCC - 0.3) to 7	V
	V-		Inverted Voltage Terminal	0.3 to -7	V
V+ +|V-|				13	V
	TIN		Transmitter Input Voltage Range	-0.3 to 6	V
	SHDN		Transmitter Input Voltage Range	-0.3 to 6	V
	RIN		Receiver Input Voltage Range	± 25	V
	TOUT		Transmitter Output Voltage Range	± 13.2	V
	ROUT		Receiver Output Voltage Range	-0.3 to (VCC + 0.3)	V
tSHORT			Transmitter Output Short to GND Time	Continuous

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. V+ and V- can have a maximum magnitude of +7V, but their absolute addition can not exceed 13 V.

SHUTDOWN AND ENABLE CONTROL TRUTH TABLE

SHDN			EN			T-OUT	R-OUT
0			0			High Z	Active
0			1			High Z	High Z
1			0			Active	Active
1			1			Active	High Z

ESD PERFORMANCE: TRANSMITTER OUTPUTS, RECEIVER INPUTS

Symbol	Parameter	Test Conditions	Min.	Typ.	Max.	Unit
ESD	ESD Protection Voltage	Human Body Model	±15			kV
ESD	ESD Protection Voltage	IEC-1000-4-2	±8			kV

ELECTRICAL CHARACTERISTICS

(C1 - C4 = 0.1μF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C)

Symbol	Parameter		Test Conditions			Min.	Typ.	Max.	Unit
ISUPPLY	VCC Power Supply Current	No Load		SHDN=VCCTA = 25°C			0.3	1	mA
ISHDN	SHUTDOWN Supply	No Load		SHDN=VCCTA = 25°C			1	10	μA
	Current

LOGIC INPUT ELECTRICAL CHARACTERISTICS

(C1 - C4 = 0.1μF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C)

Symbol	Parameter				Test Conditions		Min.	Typ.	Max.	Unit
VIL	Input Logic Threshold Low	T-IN, EN, SHDN (Note 1)							0.8	V
VIH	Input Logic Threshold High	VCC = 3.3V					2			V
		VCC = 5V					2.4
VHYS	Transmitter Input							0.25		V
	Histeresys
IIL	Input Leakage Current	T-IN, EN, SHDN						± 0.01	± 1	μA

Note 1: Transmitter input hysteresis is typically 250mV

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