intersil ISL81334, ISL41334 DATA SHEET

ISL41334IRZ				ISL81334, ISL41334
		®
			Data Sheet	December 20, 2005	FN6202.1

±15kV ESD Protected, Two Port, Dual

Protocol Transceivers

The ISLX1334 are two port interface ICs where each port can be independently configured as a single RS-485/422 transceiver, or as a dual (2 Tx, 2 Rx) RS-232 transceiver. With both ports set to the same mode, two RS-485/422 transceivers, or four RS-232 transceivers are available.

If either port is in RS-232 mode, the onboard charge pump generates RS-232 compliant ±5V Tx output levels from a single VCC supply as low as 4.5V. Four small 0.1µF capacitors are required for the charge pump. The transceivers are RS-232 compliant, with the Rx inputs handling up to ±25V, and the Tx outputs handling ±12V.

In RS-485 mode, the transceivers support both the RS-485 and RS-422 differential communication standards. The receivers feature "full failsafe" operation, so the Rx outputs remain in a high state if the inputs are open or shorted together. The transmitters support up to three data rates, two of which are slew rate limited for problem free communications. The charge pump disables when both ports are in RS-485 mode, thereby saving power, minimizing noise, and eliminating the charge pump capacitors.

Both RS-232 and RS-485 modes feature loopback and shutdown functions. Loopback internally connects the Tx outputs to the corresponding Rx input, to facilitate board level self test implementation. The outputs remain connected to the loads during loopback, so connection problems (e.g., shorted connectors or cables) can be detected. Shutdown mode disables the Tx and Rx outputs, disables the charge pumps, and places the IC in a low current (µA) mode.

The ISL41334 is a QFN packaged device that includes two additional user selectable, lower speed and edge rate options for EMI sensitive designs, or to allow longer bus lengths. It also features a logic supply pin (VL) that sets the VOH level of logic outputs, and the switching points of logic inputs, to be compatible with another supply voltage in mixed voltage systems. The QFN also adds active low Rx enable pins to increase design flexibility, allowing Tx/Rx direction control, via a single signal per port, by connecting the corresponding DE and RE pins together.

For a single port version of these devices, please see the ISL81387/ ISL41387 data sheet.

Features

•±15kV (HBM) ESD Protected Bus Pins (RS-232 or RS-485)

•Two Independent Ports, Each User Selectable for RS-232 (2 Transceivers) or RS-485/422 (1 Transceiver)

•Flow-Through Pinouts Simplify Board Layouts

•Pb-Free Plus Anneal Available (RoHS Compliant)

•Large (2.7V) Differential VOUT for Improved Noise Immunity in RS-485/422 Networks

•Full Failsafe (Open/Short) Rx in RS-485/422 Mode

•Loopback Mode Facilitates Board Self Test Functions

•User Selectable RS-485 Data Rates (ISL41334 Only)

- Fast Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Mbps - Slew Rate Limited. . . . . . . . . . . . . . . . . . . . . . . 460kbps - Slew Rate Limited. . . . . . . . . . . . . . . . . . . . . . . 115kbps

• Fast RS-232 Data Rate . . . . . . . . . . . . . . . Up to 650kbps

• Low Current Shutdown Mode. . . . . . . . . . . . . . . . . . .42µA

•QFN Package Saves Board Space (ISL41334 Only)

•Logic Supply Pin (VL) Eases Operation in Mixed Supply Systems (ISL41334 Only)

Applications

•Gaming Applications (e.g., Slot Machines)

•Single Board Computers

•Factory Automation

•Security Networks

•Industrial/Process Control Networks

•Level Translators (e.g., RS-232 to RS-422)

•Point of Sale Equipment

•Dual Channel RS-485 Interfaces

TABLE 1. SUMMARY OF FEATURES

PART NUMBER	NO. OF	PACKAGE OPTIONS		RS-485 DATA	RS-232 DATA	VL PIN?	ACTIVE H or L	LOW POWER
	PORTS			RATE (bps)	RATE (kbps)		Rx ENABLE?	SHUTDOWN?
ISL81334	2	28 Ld SOIC, 28 Ld SSOP		20M	650	NO	NONE	YES
ISL41334	2	40 Ld QFN (6 x 6mm)		20M, 460k, 115k	650	YES	L	YES
		1		CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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ISL81334, ISL41334

Ordering Information

PART NUMBER (NOTE)	PART MARKING	TEMP. RANGE (°C)		PACKAGE (Pb-Free)	PKG. DWG. #
ISL81334IAZ	81334IAZ	-40 to 85	28	Ld SSOP	M28.209
ISL81334IAZ-T	81334IAZ	-40 to 85	28	Ld SSOP Tape and Reel	M28.209
ISL81334IBZ	ISL81334IBZ	-40 to 85	28	Ld SOIC	M28.3
ISL81334IBZ-T	ISL81334IBZ	-40 to 85	28	Ld SOIC Tape and Reel	M28.3
ISL41334IRZ	41334IRZ	-40 to 85	40	Ld QFN	L40.6x6
ISL41334IRZ-T	41334IRZ	-40 to 85	40	Ld QFN Tape and Reel	L40.6x6

NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.

Pinouts

ISL81334 (SOIC, SSOP)
		TOP VIEW
C1+	1	28	C2+
C1-	2	27	C2-
V+	3	26	VCC
A1	4	25	RB1
B1	5	24	RA1
Y1	6	23	DZ1/DE1
Z1	7	22	DY1
SEL1	8	21	LB
SEL2	9	20	ON/OFF
Z2	10	19	DY2
Y2	11	18	DZ2/DE2
B2	12	17	RA2
A2	13	16	RB2
GND 14		15	V-

ISL41334 (QFN)

TOP VIEW

			NC						NC							C1-				C1+							C2+					C2-						CC						NC				NC							L
																																						V																	V
	40							39							38				37						36						35					34							33				32						31
V+	1																																																											30		RB1
A1	2																																																											29		RA1
B1	3																																																											28		DZ1/DE1
Y1	4																																																											27		DY1
Z1	5																																																											26		LB
SEL1	6																																																											25	ON/OFF
SEL2	7																																																											24		DY2
Z2	8																																																											23		DZ2/DE2
Y2	9																																																											22		RA2
B2	10																																																											21		RB2
	11							12							13				14						15						16					17							18				19						20
			A2							NC						SPA				SPB							GND					GND						RXEN1						RXEN2				V-						NC

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ISL81334, ISL41334

TABLE 2. ISL81334 FUNCTION TABLE

	INPUTS				RECEIVER OUTPUTS		DRIVER OUTPUTS		CHARGE PUMPS
SEL1 or 2	ON/OFF			DE 1 or 2	RA	RB	Y	Z	(NOTE 1)	MODE
0	1			N.A.	ON	ON	ON	ON	ON	RS-232
X	0			X	High-Z	High-Z	High-Z	High-Z	OFF	Shutdown
1	1			0	ON	High-Z *	High-Z	High-Z	OFF	RS-485
1	1			1	ON	High-Z *	ON	ON	OFF	RS-485

NOTE:

1.Charge pumps are off iff SEL1 = SEL2 = 1, or if ON/OFF = 0. If ON = 1, and either port is programmed for RS-232 mode, then the charge pumps are on.

ISL81334 Truth Tables (FOR EACH PORT)

RS-232 TRANSMITTING MODE

		INPUTS				OUTPUTS
SEL1 or 2	ON/OFF			DY	DZ	Y	Z
0	1			0	0	1	1
0	1			0	1	1	0
0	1			1	0	0	1
0	1			1	1	0	0
0	0			X	X	High-Z	High-Z
		RS-232 RECEIVING MODE
		INPUTS				OUTPUT
SEL1 or 2	ON/OFF			A	B	RA	RB
0	1			0	0	1	1
0	1			0	1	1	0
0	1			1	0	0	1
0	1			1	1	0	0
0	1			Open	Open	1	1
0	0			X	X	High-Z	High-Z

RS-485 TRANSMITTING MODE

			INPUTS						OUTPUTS
SEL1 or 2	ON/OFF					DE1 or 2	DY		Y		Z
1	1					1	0		1		0
1	1					1	1		0		1
1	1					0	X	High-Z		High-Z
1	0					X	X	High-Z			High-Z
			RS-485 RECEIVING MODE
			INPUTS						OUTPUT
SEL1 or 2	ON/OFF						B-A		RA		RB *
1	1					≥ -40mV			1		High-Z
1	1					≤ -200mV			0		High-Z
1	1					Open or Shorted together			1		High-Z
1	0						X		High-Z		High-Z

* Internally pulled high through a 40kΩ resistor.

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ISL81334, ISL41334

TABLE 3. ISL41334 FUNCTION TABLE

RECEIVER

DRIVER

DRIVER

INPUTS

OUTPUTS

OUTPUTS

CHARGE

DATA

SEL1 or 2

RXEN

1

RA

RB

PUMPS

RATE

ON/OFF

SPA

SPB

or 2

DE 1 or 2

Y

Z

(NOTE 2)

(Mbps)

MODE

0

1

X

X

0

N.A.

ON

ON

ON

ON

ON

0.46

RS-232

0

1

X

X

1

N.A.

High-Z

High-Z

ON

ON

ON

0.46

RS-232

X

0

X

X

X

X

High-Z

High-Z

High-Z

High-Z

OFF

N.A.

Shutdown

1

1

X

X

0

0

ON

High-Z *

High-Z

High-Z

OFF

N.A.

RS-485

1

1

0

0

0

1

ON

High-Z *

ON

ON

OFF

0.46

RS-485

1

1

0

1

0

1

ON

High-Z *

ON

ON

OFF

0.115

RS-485

1

1

1

0

0

1

ON

High-Z *

ON

ON

OFF

20

RS-485

1

1

1

1

0

1

ON

High-Z *

ON

ON

OFF

20

RS-485

1

1

X

X

1

0

High-Z

High-Z *

High-Z

High-Z

OFF

N.A.

RS-485

1

1

0

0

1

1

High-Z

High-Z *

ON

ON

OFF

0.46

RS-485

1

1

0

1

1

1

High-Z

High-Z *

ON

ON

OFF

0.115

RS-485

1

1

1

0

1

1

High-Z

High-Z *

ON

ON

OFF

20

RS-485

1

1

1

1

1

1

High-Z

High-Z *

ON

ON

OFF

20

RS-485

NOTE:

2.Charge pumps are off iff SEL1 = SEL2 = 1, or if ON/OFF = 0. If ON = 1, and either port is programmed for RS-232 mode, then the charge pumps are on.

ISL41334 Truth Tables (FOR EACH PORT)

RS-232 TRANSMITTING MODE

			INPUTS									OUTPUTS
SEL1 or 2	ON/OFF						DY			DZ		Y				Z
0	1						0			0		1			1
0	1						0			1		1			0
0	1						1			0		0			1
0	1						1			1		0			0
0	0						X			X		High-Z			High-Z
			RS-232 RECEIVING MODE
					INPUTS								OUTPUT
							RXEN	1
SEL1 or 2	ON/OFF						or 2			A		B	RA			RB
0	1					0				0	0		1			1
0	1					0				0	1		1			0
0	1					0				1	0		0			1
0	1					0				1	1		0			0
0	1					0				Open	Open		1			1
0	1					1				X		X	High-Z			High-Z
0	0						X			X		X	High-Z			High-Z

RS-485 TRANSMITTING MODE

DATA

INPUTS

OUTPUTS

RATE

SEL1

ON/

DEN

Y

Z

Mbps

or 2

OFF

1 or 2

SPA

SPB

DY

1

1

1

0

0

0/1

1/0

0/1

0.46

1

1

1

0

1

0/1

1/0

0/1

0.115

1

1

1

1

X

0/1

1/0

0/1

20

1

1

0

X

X

X

High-Z

High-Z

N.A.

1

0

X

X

X

X

High-Z

High-Z

N.A.

RS-485 RECEIVING MODE

INPUTS

OUTPUT

SEL1

RXEN

1

or 2

ON/OFF

or 2

B-A

RA

RB *

1

1

0

≥ -40mV

1

High-Z

1

1

0

≤ -200mV

0

High-Z

1

1

0

Open or Shorted

1

High-Z

together

1

1

1

X

High-Z

High-Z

1

0

X

X

High-Z

High-Z

* Internally pulled high through a 40kΩ resistor.

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ISL81334, ISL41334

Pin Descriptions

PIN

MODE

FUNCTION

GND

BOTH

Ground connection.

BOTH

Enables loopback mode when low. Internally pulled-high.

LB

NC

BOTH

No Connection.

BOTH

disables the charge pumps. In either mode, a low disables all the outputs,

ON/OFF

If either port is in RS-232 mode, a low on ON/OFF

and places the device in low power shutdown. Internally pulled-high. ON = 1 for normal operation.

BOTH

Active low receiver output enable. Rx is enabled when

is low; Rx is high impedance when

is high. Internally

RXEN

RXEN

RXEN

pulled low. (QFN only)

SEL

BOTH

Interface Mode Select input. High puts corresponding port in RS-485 Mode, while a low puts it in RS-232 Mode.

VCC

BOTH

System power supply input (5V).

VL

BOTH

Logic-Level Supply. All TTL/CMOS inputs and outputs are powered by this supply. (QFN only)

A

RS-232

Receiver input with ±15kV ESD protection. A low on A forces RA high; A high on A forces RA low.

RS-485

Inverting receiver input with ±15kV ESD protection.

B

RS-232

Receiver input with ±15kV ESD protection. A low on B forces RB high; A high on B forces RB low.

RS-485

Noninverting receiver input with ±15kV ESD protection.

DY

RS-232

Driver input. A low on DY forces output Y high. Similarly, a high on DY forces output Y low.

RS-485

Driver input. A low on DY forces output Y high and output Z low. Similarly, a high on DY forces output Y low and output Z high.

DZ

RS-232

Driver input. A low on DZ forces output Z high. Similarly, a high on DZ forces output Z low.

DE

RS-485

Driver output enable. The driver outputs, Y and Z, are enabled by bringing DE high. They are high impedance when DE is

low. Internally pulled high when port selected for RS-485 mode.

RA

RS-232

Receiver output.

RS-485

Receiver output: If B > A by at least -40mV, RA is high; If B < A by -200mV or more, RA is low; RA = High if A and B are

unconnected (floating) or shorted together (i.e., full fail-safe).

RB

RS-232

Receiver output.

RS-485

Not used. Internally pulled-high, and unaffected by

RXEN.

Y

RS-232

Driver output with ±15kV ESD protection.

RS-485

Inverting driver output with ±15kV ESD protection.

Z

RS-232

Driver output with ±15kV ESD protection.

RS-485

Noninverting driver output with ±15kV ESD protection.

SP

RS-485

Speed control. Internally pulled-high. (QFN only)

C1+

RS-232

External capacitor (voltage doubler) is connected to this lead. Not needed if both ports in RS-485 Mode.

C1-

RS-232

External capacitor (voltage doubler) is connected to this lead. Not needed if both ports in RS-485 Mode.

C2+

RS-232

External capacitor (voltage inverter) is connected to this lead. Not needed if both ports in RS-485 Mode.

C2-

RS-232

External capacitor (voltage inverter) is connected to this lead. Not needed if both ports in RS-485 Mode.

V+

RS-232

Internally generated positive RS-232 transmitter supply (+5.5V). C3 not needed if both ports in RS-485 Mode.

V-

RS-232

Internally generated negative RS-232 transmitter supply (-5.5V). C4 not needed if both ports in RS-485 Mode.

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ISL81334, ISL41334

Typical Operating Circuit

RS-232 MODE WITHOUT LOOPBACK

+5V	+	0.1µF
			26

1

C1

C1+

V

3

0.1µF

+

CC

V+

+C3

2

C1-

0.1µF

C2

28

C2+

0.1µF

+

V-

15

C4

27

C2-

4

R

24

+0.1µF

A1

5kΩ

RA1

B1

5

R

25

RB1

5kΩ

6

D

22

Y1

DY1

7

23

Z1

D

DZ1

21

VCC

LB

8

20

SEL1

ON/OFF

VCC

GND

14

NOTE: PINOUT FOR SOIC AND SSOP

SAME FOR PORT 2.

RS-485 MODE WITHOUT LOOPBACK

+5V	+	0.1µF
				26
		1
C1			C1+	V		3
0.1µF	+	2		CC	V+		+C3
			C1-				0.1µF
C2		28
			C2+				C4
0.1µF	+ 27		C2-		V-	15
							+0.1µF
		4
A1						24
		5		R			RA1
B1
						25	RB1
		6
Y1						22
		7		D			DY1
Z1
VCC		23	DE1		LB	21	VCC
VCC		8	SEL1		ON/OFF	20	VCC
				GND
				14
		NOTE: PINOUT FOR SOIC AND SSOP
			SAME FOR PORT 2.

			RS-232 MODE WITH LOOPBACK
+5V		+	0.1µF
						26
			1
C1		+		C1+		V	V+	3	+	C	3
0.1µF						CC
			2	C1-						0.1µF
C2		+	28	C2+			V-	15		C
µ	F										4
0.1			27
				C2-						0.1µF
									+
A1			4			R		24	RA1
					5kΩ
B1			5			R		25	RB1
					5kΩ
						LB
						Rx
Y1			6			D		22	DY1
Z1			7			D		23	DZ1
							LB	21		GND
			8	SEL1		ON/OFF		20		VCC
						GND
						14
			NOTE: PINOUT FOR SOIC AND SSOP
					SAME FOR PORT 2.
			RS-485 MODE WITH LOOPBACK
+5V			+	0.1µF
						26
				1
	C1				C1+	V			3
0.1µF			+	2		CC		V+			+ C3
					C1-						0.1µF
	C2			28
					C2+						C4
0.1µF			+27		C2-			V-	15
											+0.1µF
		A1		4
									24
						R					RA1
				5
		B1
						LB
						Rx
				6					25		RB1
	Y1								22
				7		D					DY1
	Z1
VCC				23	DE1		LB		21		GND
VCC				8	SEL1		ON/OFF		20		VCC
						GND
						14
				NOTE: PINOUT FOR SOIC AND SSOP
					SAME FOR PORT 2.

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ISL81334, ISL41334

Absolute Maximum Ratings (TA = 25°C)

VCC to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V VL (QFN Only) . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to VCC + 0.5V Input Voltages

All Except A, B (non-QFN Package) . . . . . -0.5V to (VCC + 0.5V) All Except A, B (QFN Package) . . . . . . . . . . -0.5V to (VL + 0.5V)

Input/Output Voltages

A, B (Any Mode). . . . . . . . . . . . . . . . . . . . . . . . . . . . -25V to +25V Y, Z (Any Mode, Note 3) . . . . . . . . . . . . . . . . . . . -12.5V to +12.5V

RA, RB (non-QFN Package). . . . . . . . . . . . -0.5V to (VCC + 0.5V) RA, RB (QFN Package) . . . . . . . . . . . . . . . . -0.5V to (VL + 0.5V)

Output Short Circuit Duration

Y, Z, RA, RB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Indefinite ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . See Specification Table

Thermal Information
Thermal Resistance (Typical, Note 4)	θJA (°C/W)
28 Ld SOIC Package . . . . . . . . . . . . . . . . . . . . . . .	. 65
28 Ld SSOP Package . . . . . . . . . . . . . . . . . . . . . .	. 60
40 Ld QFN Package. . . . . . . . . . . . . . . . . . . . . . . .	. 32
Maximum Junction Temperature (Plastic Package) .	. . . . . . 150°C
Maximum Storage Temperature Range . . . . . . . . . . .	-65°C to 150°C
Maximum Lead Temperature (Soldering 10s) . . . . . .	. . . . . . 300°C
(SOIC and SSOP - Lead Tips Only)

Operating Conditions

Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to 85°C

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

NOTES:

3.One output at a time, IOUT ≤ 100mA for ≤ 10 mins.

4.QFN θJA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. θJA for other packages is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 and Tech Brief TB389 for details.

Electrical Specifications Test Conditions: VCC = 4.5V to 5.5V, C1 - C4 = 0.1µF, VL = VCC (for QFN only); Unless Otherwise Specified. Typicals are at VCC = 5V, TA = 25°C (Note 5)

					TEMP
PARAMETER	SYMBOL	TEST CONDITIONS			(°C)	MIN	TYP	MAX	UNITS
DC CHARACTERISTICS - RS-485 DRIVER (SEL = VCC)
Driver Differential VOUT (no load)	VOD1				Full	-	-	VCC	V
Driver Differential VOUT (with load)	VOD2	R = 50Ω (RS-422) (Figure 1)			Full	2.5	3.1	-	V
		R = 27Ω (RS-485) (Figure 1)			Full	2.2	2.7	5	V
	VOD3	RD = 60Ω, R = 375Ω, VCM = -7V to 12V (Figure 1)			Full	2	2.7	5	V
Change in Magnitude of Driver	∆VOD	R = 27Ω or 50Ω (Figure 1)			Full	-	0.01	0.2	V
Differential VOUT for
Complementary Output States
Driver Common-Mode VOUT	VOC	R = 27Ω or 50Ω (Figure 1) (Note 9)			Full	-	-	3.1	V
Change in Magnitude of Driver	∆VOC	R = 27Ω or 50Ω (Figure 1) (Note 9)			Full	-	0.01	0.2	V
Common-Mode VOUT for
Complementary Output States
Driver Short-Circuit Current,	IOS	-7V ≤ (VY or VZ) ≤ 12V (Note 7)			Full	35	-	250	mA
VOUT = High or Low
Driver Three-State Output	IOZ	Outputs Disabled,		VOUT = 12V	Full	-	-	500	µA
Leakage Current (Y, Z)		VCC = 0V or 5.5V
				VOUT = -7V	Full	-200	-	-	µA
DC CHARACTERISTICS - RS-232 DRIVER (SEL = GND)
Driver Output Voltage Swing	VO	All TOUTS Loaded with 3kΩ to Ground			Full	±5.0	+6/-7	-	V
Driver Output Short-Circuit Current	IOS	VOUT = 0V			Full	-60	25/-35	60	mA
DC CHARACTERISTICS - LOGIC PINS (i.e., DRIVER AND CONTROL INPUT PINS)
Input High Voltage	VIH1	VL = VCC if QFN			Full	2	1.6	-	V
	VIH2	VL = 3.3V (QFN Only)			Full	2	1.2	-	V
	VIH3	VL = 2.5V (QFN Only)			Full	1.5	1	-	V

7			FN6202.1
			December 20, 2005

ISL81334, ISL41334

Electrical Specifications Test Conditions: VCC = 4.5V to 5.5V, C1 - C4 = 0.1µF, VL = VCC (for QFN only); Unless Otherwise Specified. Typicals are at VCC = 5V, TA = 25°C (Note 5) (Continued)

TEMP

PARAMETER

SYMBOL

TEST CONDITIONS

(°C)

MIN

TYP

MAX

UNITS

Input Low Voltage

VIL1

VL = VCC if QFN

Full

-

1.4

0.8

V

VIL2

VL = 3.3V (QFN Only)

Full

-

1

0.7

V

VIL3

VL = 2.5V (QFN Only)

Full

-

-

0.5

V

Input Current

IIN1

Pins Without Pull-ups or Pull-downs

Full

-2

-

2

µA

IIN2

LB,

ON/OFF,

DE, SP (QFN), RXEN (QFN)

Full

-25

-

25

µA

DC CHARACTERISTICS - RS-485 RECEIVER INPUTS (SEL = VCC)

Receiver Differential Threshold

VTH

-7V ≤ VCM ≤ 12V, Full Failsafe

Full

-0.2

-

-0.04

V

Voltage

Receiver Input Hysteresis

∆VTH

VCM = 0V

25

-

35

-

mV

Receiver Input Current (A, B)

IIN

VCC = 0V or 4.5 to 5.5V

VIN = 12V

Full

-

-

0.8

mA

VIN = -7V

Full

-0.64

-

-

mA

Receiver Input Resistance

RIN

-7V ≤ VCM ≤ 12V, VCC = 0 (Note 8) or

Full

15

-

-

kΩ

4.5V ≤ VCC ≤ 5.5V

DC CHARACTERISTICS - RS-232 RECEIVER INPUTS (SEL = GND)

Receiver Input Voltage Range

VIN

Full

-25

-

25

V

Receiver Input Threshold

VIL

Full

-

1.4

0.8

V

VIH

Full

2.4

1.9

-

V

Receiver Input Hysteresis

∆VTH

25

-

0.5

-

V

Receiver Input Resistance

RIN

VIN = ±15V, VCC Powered Up (Note 8)

Full

3

5

7

kΩ

DC CHARACTERISTICS - RECEIVER OUTPUTS (485 OR 232 MODE)

Receiver Output High Voltage

VOH1

IO = -2mA (VL = VCC if QFN)

Full

3.5

4.6

-

V

VOH2

IO = -650µA, VL = 3V, QFN Only

Full

2.6

2.9

-

V

VOH3

IO = -500µA, VL = 2.5V, QFN Only

Full

2

2.4

-

V

Receiver Output Low Voltage

VOL

IO = 3mA

Full

-

0.1

0.4

V

Receiver Short-Circuit Current

IOSR

0V ≤ VO ≤ VCC

Full

7

-

85

mA

Receiver Three-State Output

IOZR

Output Disabled, 0V ≤ VO ≤ VCC (or VL for QFN)

Full

-

-

±10

µA

Current

Unused Receiver (RB) Pull-Up

ROBZ

= VCC, SELX = VCC (RS-485 Mode)

25

-

40

-

kΩ

ON/OFF

Resistance

POWER SUPPLY CHARACTERISTICS

No-Load Supply Current, Note 6

ICC232

SEL1 or SEL2 = GND,

LB

= ON/OFF

= VCC

Full

-

3.7

7

mA

ICC485

SEL 1 & 2 =

= VCC

Full

-

1.6

5

mA

LB

= DE = ON/OFF

Shutdown Supply Current

ISHDN232

= SELX = GND,

= VCC, (SPX = VCC

Full

-

25

50

µA

ON/OFF

LB

if QFN)

ISHDN485

ON

= DEX = GND, SELX =

SOIC/SSOP

Full

-

42

80

µA

/OFF

LB = VCC, (SPX = GND if QFN)

QFN

Full

-

80

160

µA

ESD CHARACTERISTICS

Bus Pins (A, B, Y, Z) Any Mode

Human Body Model

25

-

15

-

kV

All Other Pins

Human Body Model

25

-

4

-

kV

8			FN6202.1
			December 20, 2005

ISL81334, ISL41334

Electrical Specifications Test Conditions: VCC = 4.5V to 5.5V, C1 - C4 = 0.1µF, VL = VCC (for QFN only); Unless Otherwise Specified. Typicals are at VCC = 5V, TA = 25°C (Note 5) (Continued)

					TEMP
PARAMETER	SYMBOL	TEST CONDITIONS			(°C)	MIN		TYP	MAX	UNITS
RS-232 DRIVER AND RECEIVER SWITCHING CHARACTERISTICS (SEL = GND, ALL VERSIONS AND SPEEDS)
Driver Output Transition Region	SR	RL = 3kΩ, Measured From		CL ≥ 15pF	Full	-		18	30	V/µs
Slew Rate		3V to -3V or -3V to 3V
				CL ≤ 2500pF	Full	4		12	-	V/µs
Driver Output Transition Time	tr, tf	RL = 3kΩ, CL = 2500pF, 10% - 90%			Full	0.22		1.2	3.1	µs
Driver Propagation Delay	tDPHL	RL = 3kΩ, CL = 1000pF (Figure 6)			Full	-		1	2	µs
	tDPLH				Full	-		1.2	2	µs
Driver Propagation Delay Skew	tDSKEW	tDPHL - tDPLH (Figure 6)			Full	-		240	400	ns
Driver Enable Time from Shutdown	tDENSD	VOUT = ±3.0V			25	-		20	-	µs
Driver Maximum Data Rate	DRD	RL = 3kΩ, CL = 1000pF, One Transmitter			Full	460		650	-	kbps
		Switching per port
Receiver Propagation Delay	tRPHL	CL = 15pF (Figure 7)			Full	-		50	120	ns
	tRPLH				Full	-		40	120	ns
Receiver Propagation Delay Skew	tRSKEW	tRPHL - tRPLH (Figure 7)			Full	-		10	40	ns
Receiver Maximum Data Rate	DRR	CL = 15pF			Full	0.46		2	-	Mbps
RS-485 DRIVER SWITCHING CHARACTERISTICS (FAST DATA RATE (20Mbps), SEL = VCC, ALL VERSIONS (SPA = VCC if QFN))
Driver Differential Input to Output	tDLH, tDHL	RDIFF = 54Ω, CL = 100pF (Figure 2)			Full	15		30	50	ns
Delay
Driver Output Skew	tSKEW	RDIFF = 54Ω, CL = 100pF (Figure 2)			Full	-		0.5	10	ns
Driver Differential Rise or Fall Time	tR, tF	RDIFF = 54Ω, CL = 100pF, Figure 2			Full	3		11	20	ns
Driver Enable to Output Low	tZL	CL = 100pF, SW = VCC (Figure 3)			Full	-		27	60	ns
Driver Enable to Output High	tZH	CL = 100pF, SW = GND (Figure 3)			Full	-		24	60	ns
Driver Disable from Output Low	tLZ	CL = 15pF, SW = VCC (Figure 3)			Full	-		31	60	ns
Driver Disable from Output High	tHZ	CL = 15pF, SW = GND (Figure 3)			Full	-		24	60	ns
Driver Enable from Shutdown to	tZL(SHDN)	RL = 500Ω, CL = 100pF, SW = VCC (Figure 3)			Full	-		65	250	ns
Output Low
Driver Enable from Shutdown to	tZH(SHDN)	RL = 500Ω, CL = 100pF, SW = GND (Figure 3)			Full	-		152	250	ns
Output High
Driver Maximum Data Rate	fMAX	RDIFF = 54Ω, CL = 100pF (Figure 2)			Full	-		30	-	Mbps
RS-485 DRIVER SWITCHING CHARACTERISTICS (MEDIUM DATA RATE (460kbps, QFN ONLY), SEL = VCC, SPA = SPB= GND)
Driver Differential Input to Output	tDLH, tDHL	RDIFF = 54Ω, CL = 100pF (Figure 2)			Full	200		490	1000	ns
Delay
Driver Output Skew	tSKEW	RDIFF = 54Ω, CL = 100pF (Figure 2)			Full	-		110	400	ns
Driver Differential Rise or Fall Time	tR, tF	RDIFF = 54Ω, CL = 100pF (Figure 2)			Full	300		600	1100	ns
Driver Enable to Output Low	tZL	CL = 100pF, SW = VCC (Figure 3)			Full	-		30	300	ns
Driver Enable to Output High	tZH	CL = 100pF, SW = GND (Figure 3)			Full	-		128	300	ns
Driver Disable from Output Low	tLZ	CL = 15pF, SW = VCC (Figure 3)			Full	-		31	60	ns
Driver Disable from Output High	tHZ	CL = 15pF, SW = GND (Figure 3)			Full	-		24	60	ns
Driver Enable from Shutdown to	tZL(SHDN)	RL = 500Ω, CL = 100pF, SW = VCC (Figure 3)			Full	-		65	500	ns
Output Low
Driver Enable from Shutdown to	tZH(SHDN)	RL = 500Ω, CL = 100pF, SW = GND (Figure 3)			Full	-		255	500	ns
Output High

9			FN6202.1
			December 20, 2005