Texas Instruments UC5181CQTR, UC5181CQ, UC5181CN Datasheet

UC5181C

Octal Line Receiver

FEATURES

•Meets EIA232E/423A/422A and CCITT V.10, V.11, V.28, X.26, X.27

•Single +5V Supply—TTL Compatible Outputs

•Differential Inputs withstand ±25V

•Low Open Circuit Voltage for Improved Failsafe Characteristic

•Reduced Supply Current—35mA Max

•Internal Hysteresis

DESCRIPTION

The UC5181C is an octal line receiver designed to meet a wide range of digital communications requirements as outlined in EIA standards EIA232E, EIA422A, EIA423A and CCITT V.10, V.11, V.28, X.26, and X.27. The UC5181C is similar to the UC5180C, but without the input filtering. Thus, it covers the entire range of data rates up to 10MBPS. A failsafe function allows these devices to “fail” to a known state under a wide variety of fault conditions at the inputs.

ABSOLUTE MAXIMUM RATINGS (Note 1)

Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V Output Sink Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50mA Output Short Circuit Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Sec Common Mode Input Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V Differential Input Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25V Failsafe Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to VCC PLCC Power Dissipation, TA=25° C (Note 2) . . . . . . . . . . . . . . . . . . . 1000 mW DIP Power Dissipation, TA=25° C (Note 2) . . . . . . . . . . . . . . . . . . . . . 1200 mW Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . -65° C to +150° C Lead Temperature (Soldering, 10 seconds) . . . . . . . . . . . . . . . . . . . . . . -300° C

Note 1: All voltages are with respect to ground, pin 14. Currents are positive in, negative out of the specified terminal.

Note 2: Consult packaging section of Databook for thermal limitations and considerations of package.

CONNECTION DIAGRAMS

DIL-28 (TOP VIEW)

PLCC-28 (TOP VIEW)

1/94

UC5181C

DC ELECTRICAL CHARACTERISTICS: Unless otherwise stated, these specifications apply for TA = 0°C to +70°C; VCC
		= 5V ±5%, Input Common Mode Range ±7V, TA=TJ.
PARAMETER	SYMBOL	TEST CONDITIONS			UC5181C		UNITS
					MIN	MAX
DC Input Resistance	RIN	3V ≤ |VIN|≤25V			3	7	kΩ
Failsafe Output Voltage	VOFS	Inputs Open or Shorted	0≥IOUT≤8mAVFAILSAFE=0V			0.45	V
		Together, or One Input Open	0≥IOUT≥-400µA, VFAILSAFE=VCC		2.7
		and One Grounded
Differential Input High	VTL	VOUT= 0.45V, IOUT = -440µA (See Figure		RS = 0 (Note3)	50	200	mV
Threshold		1)		RS = 500 (Note 3)		400
Differential Input Low	VTL	VOUT = 0.45V, IOUT = 8 mA (See Figure		RS = 0 (Note 3)	-200	-50	mV
Threshold		1)		RS = 500 (Note 3)	-400
Hysteresis	VH	FS=0V or VCC (See Figure 1)			45	140	mV
Open Circuit Input Voltage	VIOC					75	mV
Input Capacitance	CI					20	pF
High Level Output Voltage	VOH	VID = 1V, IOUT = -440 µA			2.7		V
Low Level Output Voltage	VOL	VID = -1V (Note 4)		IOUT = 4 mA		0.4	V
				IOUT = 8 mA		0.45
Short Circuit Output	IOS	Note 5			20	100	mA
Current
Supply current	ICC	4.75V ≤VCC≤5.25V				35	mA
Input Current	IIN	Other Inputs Grounded		VIN = +10V		3.25	mA
				VIH = -10V	-3.25

Note 3: RS is a resistor in series with each input. Note 4: Measure after 100 ms warm up (at 0°C).

Note 5: Only 1 output may be shorted at a time and then only for a maximum of 1 sec.

Note 6: The delays, either tPLH or tPHL, shall not vary from receiver to receiver by more than 35ns.

Figure 1. VTL, VTH,VH Definition

AC ELECTRICAL CHARACTERISTICS: VCC=5V ±5%. TA=0°C to +70°C, Figure 2 TA=TJ.

PARAMETER	SYMBOL	TEST CONDITIONS	UC5181C		UNITS
			MIN	MAX
Propagation Delay–Low to High	tPLH	CL=50pF, VIN= ±500 mV (Note 6)		120	ns
Propagation Delay–High to Low	tPHL	CL=50pF, VIN= ±500 mV (Note 6)		120	ns
Acceptable Input frequency	fA	Unused Input Grounded, VIN= ±200 mV		5.0	MHz

Figure 2. AC Test Circuit

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