mc145028 Freescale Semiconductor, Inc, mc145028 Datasheet
mc145028
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mc145028 Summary of contents
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... Ordering Information Device Package MC145026P Plastic DIP MC145026D SOG Package MC145027P Plastic DIP MC145027DW SOG Package MC145028P Plastic DIP MC145028DW SOG Package Contents 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2 Electrical Specifications . . . . . . . . . . . . . . . . 4 3 Operating Characteristics . . . . . . . . . . . . . . . 8 4 Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . 9 5 MC145027 and MC145028 Timing . . . . . . . . 16 6 Package Dimensions . . . . . . . . . . . . . . . . . . 18 ...
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... The MC145028 decoder treats all nine trinary digits as an address which allows 19,683 codes. If binary data is encoded, 512 codes are possible. The VT output goes high on the MC145028 when two addresses are consecutively received (in one encoding sequence) which both match the local address. ...
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... A6/D6 A7/D7 A8/D8 A9/D9 Figure 2. MC145026 Encoder Block Diagram SEQUENCER CIRCUIT Figure 3. MC145027 Decoder Block Diagram MC145026, MC145027, MC145028 Technical Data, Rev. 4 Freescale Semiconductor 3-PIN ÷ 4 OSCILLATOR DIVIDER AND ENABLE RING COUNTER AND 1-OF-9 DECODER ...
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... This device contains protection circuitry to guard against damage due to high static voltages or electric fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to this high-impedance circuit. For proper operation, V the range VSS ≤ ≤ VDD out MC145026, MC145027, MC145028 Technical Data, Rev CONTROL LOGIC ...
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... (MC145028) C Input Capacitance ( Quiescent Current - MC145026 DD I Quiescent Current - MC145027, MC145028 DD 1 Also see next Electrical Characteristics table for 2.5 V specifications. MC145026, MC145027, MC145028 Technical Data, Rev. 4 Freescale Semiconductor 1 , MC145027, and MC145028 (Voltage Referenced 40°C V Min ( 5.0 ...
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... High-Level Output Current OH I Low-Level Output Current OL I Input Current (TE - Pull-Up Device Input Current (A1-A5, A6/D6-A9/D9 Quiescent Current DD I Dynamic Supply Current (f dd MC145026, MC145027, MC145028 Technical Data, Rev MC145027, and MC145028 (continued) (Voltage Referenced 40°C V Min 5 5.0 ...
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... Also see next Electrical Characteristics table for 2.5 V specifications. Table 5. Switching Characteristics - MC145026 (C Symbol Characteristic Output Transition Time TLH THL f Encoder Clock Frequency osc t TE Pulse Width w MC145026, MC145027, MC145028 Technical Data, Rev. 4 Freescale Semiconductor 1 , MC145027, and MC145028 (C Guaranteed Limit Figure ...
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... If only a high state results from the two tests, the input is assumed to be hardwired only a low state is obtained, the input is assumed to be hardwired high and a low can be forced at an input, an open is assumed and is encoded as such. The “high” and MC145026, MC145027, MC145028 Technical Data, Rev 90 ...
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... The VT output is used to indicate that a valid address has been received. For transmission security, two identical transmitted words must be consecutively received before a VT output signal is issued. The MC145028 allows 19,683 addresses when trinary levels are used. 512 addresses are possible when binary levels are used. 4 Pin Descriptions 4 ...
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... Address Inputs (Pins MC145027, Address Inputs (Pins 15, 14, 13, 12) - MC145028 These are the local address inputs. The states of these pins must match the appropriate encoder inputs for the VT pin to go high. The local address may be encoded with trinary or binary data. ...
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... The most-negative supply potential. This pin is usually ground Positive Power Supply (Pin 16) The most-positive power supply pin. MC145026, MC145027, MC145028 Technical Data, Rev. 4 Freescale Semiconductor 4, these pins accept a resistor and capacitor that are used to determine this pin accepts a resistor and capacitor that are used to detect both the ...
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... min TE ENCODER OSCILLATOR (PIN 12) D out (PIN 15) HIGH VT (PIN 11) DATA OUTPUTS MC145026, MC145027, MC145028 Technical Data, Rev INTERNAL ENABLE should be chosen to be ≥ 2 times R The value for R S current through R is insignificant compared to current through R S ...
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... DATA PERIOD Figure 12. Encoder Data Waveforms 500 400 300 200 100 (pF) ON PINS (MC145027); layout PINS AND (MC145028) Figure 13 Decoders Only max layout Pin Descriptions ...
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... Pin Descriptions NO NO MC145026, MC145027, MC145028 Technical Data, Rev HAS THE TRANSMISSION BEGUN? YES DOES THE 5-BIT NO ADDRESS MATCH THE ADDRESS ADDRESS MISMATCH PINS? YES STORE THE 4-BIT DATA DOES THIS DATA NO MATCH THE PREVIOUSLY DATA MISMATCH STORED DATA? YES ...
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... NO NO MC145026, MC145027, MC145028 Technical Data, Rev. 4 Freescale Semiconductor HAS THE TRANSMISSION BEGUN? YES DOES DISABLE VT ON THE THE ADDRESS NO 1ST ADDRESS MATCH THE MISMATCH AND IGNORE ADDRESS THE REST OF PINS? YES IS THIS AT LEAST THE NO 2ND CONSECUTIVE MATCH SINCE VT DISABLE? YES ...
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... MC145027 and MC145028 Timing 5 MC145027 and MC145028 Timing To verify the MC145027 or MC145028 timing, check the waveforms on C1 (Pin 7) and R2/C2 (Pin 10) as compared to the incoming data waveform on D The R-C decay seen on C1 discharges down to 1/3 V (labelled “DOS” in Figure 16) is the point in time where the decision is made whether the data seen ...
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... Example R/C Values (All Resistors and Capacitors are ± 5%) ′ pF (kHz) R osc 362 10 k 181 MC145026, MC145027, MC145028 Technical Data, Rev. 4 Freescale Semiconductor V DD 0.1 µF 0.1 µ out ...
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... PIN 1 INDEX 4.0 B 3.8 5 0.50 X45˚ 0.25 Figure 20. Outline Dimensions for D SUFFIX SOG (SMALL OUTLINE GULL-WING) PACKAGE MC145026, MC145027, MC145028 Technical Data, Rev SEATING -T- PLANE Figure 19. Outline Dimensions for P SUFFIX PLASTIC DIP (DUAL IN-LINE PACKAGE) (Case Outline 648-08, Issue R) 1 ...
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... B M 10.55 8X 10.05 PIN'S NUMBER 16 1 PIN 1 INDEX 7.6 7.4 5 0.75 ˚ X45 0.25 Figure 21. Outline Dimensions for DW SUFFIX SOG (SMALL OUTLINE GULL-WING) PACKAGE MC145026, MC145027, MC145028 Technical Data, Rev. 4 Freescale Semiconductor 2.65 A 2.35 0.25 0.10 16X 14X 10.45 1.27 4 10.15 A SEATING T PLANE B 16X 0.1 T 0.32 0.23 1.0 0.4 SECTION A-A (Case Outline 751G-04, Issue D) Package Dimensions ...
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... Freescale Semiconductor was negligent regarding the design or manufacture of the part. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005. All rights reserved. ...