MC145403

•MC145404•MC145405•MC145408

MOTOROLA

3

ABSOLUTE MAXIMUM RATINGS

(Voltages referenced to GND, except where noted)

Rating

Symbol

Value

Unit

DC Supply Voltage (VDD ≥ VCC)

VDD

VSS

VCC

– 0.5 to + 13.5

+ 0.5 to – 13.5

– 0.5 to + 6.0

V

Input Voltage Range

Rx1 – Rx

n

DI1 – DI

n

VIR

VSS – 15 to VDD + 15

0.5 to VCC + 15

V

DC Current Drain per Pin

I

± 00

mA

Power Dissipation

PD

1

W

Operating Temperature Range

TA

– 40 to + 85

°C

Storage Temperature Range

Tstg

– 85 to + 150

°C

Parameter

Symbol

Min

Typ

Max

Unit

DC Supply Voltage

VDD

VSS

VCC

4.5

– 4.5

4.5

5 to 12

– 5 to – 12

5

13.2

– 13.2

5.5

V

Quiescent Supply Current (Outputs Unloaded, Inputs Low)

VDD = + 12 V

VSS = – 12 V

VCC = + 5 V

IDD

ISS

ICC

—

—

—

425

– 400

110

635

– 600

200

µA

RECEIVER ELECTRICAL SPECIFICATIONS

(Voltage polarities referenced to GND = 0 V, VDD = + 12 V, VSS = – 12 V, TA = – 40 to + 85°C, VCC = + 5 V, ± 10%)

Characteristic

Symbol

Min

Typ

Max

Unit

Input Turn–On Threshold

Rx1 – Rx

n

VDO = VOL

Von

1.35

1.8

2.35

V

Input Turn–Off Threshold

Rx1 – Rx

n

VDO = VOH

Voff

0.75

1

1.25

V

Input Threshold Hysteresis

∆ = Von – Voff

Vhys

0.6

0.8

—

V

Input Resistance

(VSS – 15 V) ≤ V Rx1 – Rxn ≤ (VDD + 15 V)

Rin

3

5.4

7

k

Ω

High Level Output Voltage

Iout = – 20 µA

VRx = – 3 to – 25 V* (DO1 – DOn)Iout = – 1.0 mA

VOH

4.9

3.8

4.9

4.3

—

—

V

Low Level Output Voltage

Iout = + 2 mA

VRx = + 3 to + 25 V* (DO1 – DOn)Iout = + 4 mA

VOL

—

—

0.02

0.5

0.5

0.7

V

* This is the range of input voltages as specified by EIA–232–E to cause a receiver to be in the high or low.

This device contains circuitry to protect the

inputs and outputs against damage due to high

static voltages or electric fields; however, it is

advised that normal precautions be taken to

avoid applications of any voltage higher than

maximum rated voltages to this high imped-

ance circuit.

For proper operation it is recommended that

Vout and Vin be constrained to the ranges

described as follows:

Digital I/O: Driver Inputs (DI):

(GND

≤ VDI ≤ VCC).

Receiver Outputs (DO):

(GND

≤ VDO ≤ VCC).

EIA–232 I/O: Driver Outputs (Tx):

(VSS ≤ VTx1 – Txn ≤ VDD).

Receiver Inputs (Rx):

VSS – 15 V ≤ VRx1 – Rxn ≤ VDD

+ 15 V).

Reliability of operation is enhanced if unused

outputs are tied off to an appropriate logic

voltage level (e.g., either GND or VCC for DI,

and GND for Rx).