STMicroelectronics ST202EB, ST202EC, ST232EB, ST232EC Technical data

ST202EB - ST202EC

ST232EB - ST232EC

± 15 kV ESD protected 5 V RS-232 transceiver

Features
■ ESD protection for RS-232 I/O pins:
■ ± 15 kV human body model
■ Guaranteed 230 kbps date rate
■ Guaranteed slew rate range 3 to 30 V/ms	SOP	SOP Large
■ Operate from a single 5 V power supply	SOP


Description
The ST202E/ST232E are a 2 driver 2 receiver
devices designed for RS-232 and V.28
communications in harsh environments. Each		TSSOP
transmitter output and receiver input is protected		TSSOP
against ± 15 kV electrostatic discharge (ESD)
shocks. The drivers meet all EIA/TIA-232E and
CCITT V.28 specifications at data rates up to 230
kbps, when loaded in accordance with the
EIA/TIA-232E specification. The ST202E/232E
use a single 5 V supply voltage.
The ST232E operates with four 1 µF capacitors,
while the ST202E operates with four 0.1 µF
capacitors, further reducing cost and board
space.

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ST202EB - ST202EC - ST232EB - ST232EC

Contents

1	Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. 3
2	Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4
3	Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5
4	Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	7
5	Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . .	8
6	Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10
7	Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	17

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ST202EB - ST202EC - ST232EB - ST232EC	Pin configuration

1 Pin configuration

Table 2.	Pin description
Pin n°		Symbol	Note

1		C1+	Positive terminal for the first charge pump capacitor
2		V+	Doubled voltage terminal

3		C1-	Negative terminal for the first charge pump capacitor
4		C2+	Positive terminal for the second charge pump capacitor
5		C2-	Negative terminal for the second charge pump capacitor
6		V-	Inverted voltage terminal

7		T2OUT	Second transmitter output voltage
8		R2IN	Second receiver input voltage
9		R2OUT	Second receiver output voltage
10		T2IN	Second transmitter input voltage
11		T1IN	First transmitter input voltage
12		R1OUT	First receiver output voltage
13		R1IN	First receiver input voltage
14		T1OUT	First transmitter output voltage
15		GND	Ground

16		VCC	Supply voltage

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Maximum ratings			ST202EB - ST202EC - ST232EB - ST232EC

2	Maximum ratings
Table 3.	Absolute maximum ratings

Symbol		Parameter		Value	Unit

VCC		Supply voltage		-0.3 to 6	V
V+		Extra positive voltage		(VCC -0.3) to 14	V
V-		Extra negative voltage		-14 to 0.3	V

TIN		Transmitter input voltage range		-0.3 to (V+ + 0.3)	V
RIN		Receiver input voltage range		± 30	V
TOUT		Transmitter output voltage range		(V- - 0.3) to (V+ + 0.3)	V
ROUT		Receiver output voltage range		-0.3 to (VCC + 0.3)	V
TSCTOUT		Short circuit duration on TOUT		infinite
TSTG		Storage temperature range		-65 to 150	°C
Note:	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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ST202EB - ST202EC - ST232EB - ST232EC					Electrical characteristics

3		Electrical characteristics
Table 4.	ESD performance: transmitter outputs, receiver inputs

Symbol		Parameter		Test condition	Min.	Typ.	Max.	Unit

ESD		ESD protection voltage	Human Body Model		± 15			kV

ESD		ESD protection voltage	IEC 1000-4-2 (Contact Discharge)		± 6			kV

ESD		ESD protection voltage	IEC 1000-4-2 (Air Discharge)		± 8			kV

Note:		All test versus GND.
Table 5.	Electrical characteristics
	(C1 - C4 = 0.1 µF for ST202E, C1 - C4 = 0.1 µF for ST232E, VCC = 5 V ± 10 %,
	TA = -40 to 125 °C, unless otherwise specified. Typical values are referred to TA = 25 °C).
Symbol		Parameter		Test condition	Min.	Typ.	Max.	Unit

ISUPPLY		VCC power supply current		No Load, TA = 25°C		5	10	mA

Table 6. Transmitter electrical characteristics

(C1 - C4 = 0.1 µF, VCC = 5 V ± 10 %, TA = -40 to 85 °C, unless otherwise specified. Typical values are referred to TA = 25 °C).

Symbol	Parameter	Test condition	Min.	Typ.	Max.	Unit

VTOUT	Output voltage swing	All Transmitter outputs are loaded	± 5	± 9		V
VTOUT	Output voltage swing	with 3 kΩ to GND	± 5	± 9		V
		with 3 kΩ to GND

ITIL	Input leakage current				± 10	µA
VTIL	Input logic threshold low		0.8			V
VTIH	Input logic threshold high				2	V
SRT	Transition slew rate	TA = 25°C, VCC = 5 V RL = 3 to 7	3	6	30	V/µs
SRT	Transition slew rate	KΩ, CL = 50 to 1000 pF (1)	3	6	30	V/µs
DR	Data rate	RL = 3 to 7 kΩ, CL = 50 to 1000 pF	230	400		kbits/s
DR	Data rate	one transmitter switching	230	400		kbits/s

RTOUT	Transmitter output resistance	VCC = V+ = V- = 0V VOUT = ± 2 V	300			Ω
ISC	Transmitter output short circuit			±10	±60	mA
ISC	current			±10	±60	mA
tDT	Transmitter propagation delay	RL = 3 to 7 kΩ, CL = 50 to 2500 pF		2		µA
tDT	Transmitter propagation delay	All transmitter loaded		2		µA

1.Measured from 3 V to -3 V or from -3 V to 3 V

2.One transmitter output is loaded with RL = 3 kΩ to 7 kΩ, CL = 50 to 1000 pF

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Electrical characteristics	ST202EB - ST202EC - ST232EB - ST232EC

Table 7. Receiver electrical characteristics

(C1 - C4 = 0.1 µF, VCC = 5 V ± 10 %, TA = -40 to 85 °C, unless otherwise specified. Typical values are referred to TA = 25 °C).

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