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ABCircuits www.abcircuits.com POB 123 New Hill NC 27562 (919) 290-7104

Part Number SIO8

Copyright © 2014 ABCircuits. Revised September 2014 Page 6 of 8

Serial Output Stream

STOP

IA4

IA0

IA7

BIT CELLS

IA1

INPUT IA BITS

START

IA6

IA2

IA3

DATA STREAM

IA5

(MODE=low or grounded)

When the input bits on IA0-7 change, or the 100 mS or 1000 mS (depending on the state of the

SPD pin) delay times out, the SIO8 transmits one byte on the SOUT- pin. The bits from IA0-7 are

transmitted. The SIO8 automatically adds start and stop bits to the data stream. The data is

transmitted at 9600 BPS, 8 bits, 1 stop, no parity.

(MODE=high or open)

After a byte is received on the SIN- pin the SIO8 transmits one byte on the SOUT- pin. The bits

from IA0-7 are transmitted. The SIO8 automatically adds start and stop bits to the data stream.

The data is transmitted at 9600 BPS, 8 bits, 1 stop, no parity.

Absolute Maximum Ratings

Symbol

Description

Min

Typical

Max

Units

Notes

Storage Temperature

-55

25

+100

ºC

Operating Temperature

-40

+85

ºC

-0.5

+6.0

V

Input Voltage

V

Maximum current into any pin

-25

+50

mA

ESD

Electrostatic Discharge Voltage

2000

V

Human Body Model

ESD

LU

Latch up current

200

mA

DC Electrical Characteristics

Symbol

Description

Min

Typical

Max

Units

Notes

Supply Voltage

2.4

5.25

V

Supply Current

5

8

mA

Note 1

High Output Level

V

Low Output Voltage

0.75

V

Input High Level

2.1

V

Input Low Level

0.8

V

High Level Source Current

10

mA

Low Level Sink Current

25

mA

Capacitive load

3.5

10

pF

Input leakage

1

nA

Pull Up Resistors On Inputs

IA0-6

4

5.6

8

k?

Note 1: Vdd=5VDC, all inputs and outputs open