ABSOLUTE MAXIMUM RATINGS (Note 1)

Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V

Output Sink Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mA

Output Short Circuit Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Sec

Common Mode Input Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V

Differential Input Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25V

Failsafe Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to V

PLCC Power Dissipation, TA = 25°C (Note 2). . . . . . . . . . . . . . . . . . . 1000 mW

DIP Power Dissipation, T

A = 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

into, negative out of the specified terminal

Note 2: Consult Packaging Section of Databook for thermal limitations and

considerations of package.

Octal Line Receiver

UC5180C

DIL-28 (TOP VIEW)

CONNECTION DIAGRAMS

DESCRIPTION

The UC5180C is an octal line receiver designed to meet a wide range

of digital communications requirements as outlined in EIA standards

EIA232E, EIA423A, EIA422A, and CCITT V.10, V.11, V.28, X.26, and

X.27. The UC5180C includes an input noise filter and is intended for

applications employing data rates up to 200 KBPS. A failsafe function

allows these devices to "fail" to a known state under a wide variety of

fault conditions at the inputs.

FEATURES

• Meets EIA 232E/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--35 mA Max

• Input Noise Filter

• Internal Hysteresis

PLCC-28 (TOP VIEW)

1/94

DC ELECTRICAL CHARACTERISTICS:

PARAMETERS SYMBOL TEST CONDITIONS UC5180C UNITS

MIN MAX

DC Input Resistance R

IN 3V ≤ | VIN | ≤ 25V 3 7 kΩ

Failsafe Output Voltage V

OFS Inputs Open or Shorted

Together, or One Input

Open and One Grounded

0 ≤ IOUT ≤ 8mA, VFAILSAFE = 0V 0.45 V

0 ≥ I

OUT ≥ - 400 µA,

FAILSAFE = VCC

2.7

Differential Input High

Threshold

TH VOUT = 2.7V, IOUT = 440 µA

(See Figure 1)

RS = 0 (Note 2) 50 200 mV

S = 500 (Note 2) 400

Differential Input Low

Threshold

TL VOUT = 0.45V, IOUT = 440 mA

(See Figure 1)

RS = 0 (Note 2) -200 -50 mV

S = 500 (Note 2) -400

Hysteresis V

H FS = 0V or VCC (See Figure 1) 50 140 mV

Open Circuit Input Voltage V

ICC 75 mV

Input Capacitance C

I 20 pF

High Level Output Voltage V

CH VID = 1V, IOUT = - 440µA2.7V

Low Level Output Voltage V

OL VID = -1V

(Note 3)

IOUT = 4 mA 0.4 V

OUT = 8 mA 0.45

Short Circuit Output

Current

OS Note 4 20 100 mA

Supply Current I

CC 4.75V ≤ VCC ≤ 5.25V 35 mA

Input Current I

IN Other Inputs Grounded VIN = +10V 3.25 mA

= -10V -3.25

UC5180C

Figure 1. VtL, VtH, VH Definition

Unless otherwise stated these specifications apply for TA = 0°C to +70°C, VCC

= 5V ± 5%, Input Common Mode Range ± 7V, TA =TJ

AC ELECTRICAL CHARACTERISTICS:

PARAMETERS SYMBOL TEST CONDITIONS UC5180C UNITS

MIN MAX

Propagation Delay - Low to High t

PLH CL = 50pF, VIN =

500mV 550 ns

Propagation Delay - High to Low t

PHL CL = 50pF, VIN =

500mV 550 ns

Acceptance Input Frequency f

A Unused Input Grounded, VIN = ± 200mV 0.1 MHz

Rejectable Input Frequency f

R Unused Input Grounded, VIN = ± 500mV 5.5 MHz

CC = 5V ± 5%, TA = 0°C to + 70°C, Figure 2, TA = TJ.

Note 2: R

is a resistor in series with each input.

Note 3: Measured after 100ms warm up (at 0°C)

Note 4: Only 1 output may be shorted at one time

and then only for a maximum of 1 sec.

UC5180C

APPLICATIONS INFORMATION

Failsafe Operation

These devices provide a failsafe operating mode to

guard against input fault conditions as defined in

EIA422A and EIA423A standards. These fault condi-

tions are (1) drive in power-off condition, (2) receiver not

interconnected with driver, (3) open-circuited intercon-

necting cable, and (4) short-circuited interconnecting

cable. If one of these four fault conditions occurs at the

inputs of a receiver, then the output of that receiver is

driven to a known logic level. The receiver is pro-

grammed by connecting the failsafe input to V

CC or

ground. A connection to V

CC provides a logic "1" output

under fault conditions, while a connection to ground

provides a logic "0". There are two failsafe pins (F

and FS2) on the UC5180C where each provides com-

mon failsafe control for four receivers.

Input Filtering (UC5180C)

The UC5180C has input filtering for additional noise re-

jection. This filtering is a function of both signal level

and frequency. For the specified input (5.5 MHz at ±500

mV) the input stage filter attenuates the signal such that

the output stage threshold levels are not exceeded and

no change of state occurs at the output.

EIA232E/V.28 / EIA423A/V.10 DATA TRANSMISSION

EIA422A/V.11 DATA TRANSMISSION

UNITRODE INTEGRATED CIRCUITS

7 CONTINENTAL BLVD. •• MERRIMACK, NH 03054

TEL. (603) 424-2410 •• FAX (603) 424-3410

Figure 2. AC Test Circuit

Part #	UC5180CQ
Description	IC ASYNC OCTAL LINE RCVR 28-PLCC
Category	IC
Availability	In Stock
Qty	9

Qty	Price
1 - 1	$5.13855
2 - 3	$4.11084
4 - 5	$3.39144
6 - 7	$3.15164
8 +	$2.80907

UC5180CQ

Related Items

Technical Document