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SIO7 Datasheet(PDF) 5 Page - ABCircuits |
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SIO7 Datasheet(HTML) 5 Page - ABCircuits |
5 / 7 page Turning Ideas Into Reality ABCircuits www.abcircuits.com POB 123 New Hill NC 27562 (919) 290-7104 Part Number SIO7 Copyright © 2014 ABCircuits. Revised September 2014 Page 5 of 7 Serial Output Stream IA4 START IA2 IA6 IA3 IA0 BIT CELLS DATA STREAM IA5 0 IA1 STOP INPUT IA BITS When the input bits on IA0-6 change, or the 100 mS delay times out, the SIO7 transmits one byte on the SOUT- pin. The bits from IA0-6 are transmitted, the eighth bit is a zero. The SIO7 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 Tstg Storage Temperature -55 25 +100 ºC Ta Operating Temperature -40 +85 ºC Vdd Vdd - Vss Voltage -0.5 +6.0 V Vio Input Voltage Vss - 0.5 Vdd +0.5 V Imio 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 Vdd Supply Voltage 2.4 5.25 V Idd Supply Current 5 8 mA Note 1 Voh High Output Level Vdd - 1.0 V Ioh=10 mA Vol Low Output Voltage 0.75 V Iol=25 mA Vih Input High Level 2.1 V Vil Input Low Level 0.8 V Ioh High Level Source Current 10 mA Iol Low Level Sink Current 25 mA Cio Capacitive load 3.5 10 pF Iil Input leakage 1 nA Rpu Pull Up Resistors On Inputs IA0-6 4 5.6 8 k? Note 1: Vdd=5VDC, all inputs and outputs open Theory Of Operation The SIO7 IC is a custom programmed microprocessor designed to monitor a serial input/output stream. When a byte is received, bit 8 is checked. If bit 8 is zero, the byte is placed on the OA0- 6 pins, otherwise the byte is ignored. Anytime an input IA0-6 changes, or the 100 mS timer expires, the part transmits the data on the IA0-6 pins. Bit 8 of the transmitted byte is a zero. |
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