MC145027P Freescale Semiconductor, MC145027P Datasheet
MC145027P
Specifications of MC145027P
Available stocks
Related parts for MC145027P
MC145027P Summary of contents
Page 1
... All MC145026 devices manufactured after date code 9314 or 314 are guaranteed over this wider voltage range. All previous designs using the low–voltage SC41342 should convert to the MC145026, which is a drop–in replacement. The SC41342 part number has been discontinued. REV 2 1/98 MOTOROLA Motorola, Inc. 1998 Components MC145026P MC145026D * MC145027P, SC41343P MC145027DW, SC41343DW MC145028P, SC41344P MC145028DW, SC41344DW MC145028/SC41344 DECODERS ...
Page 2
OSCILLATOR A6/D6 A7/D7 A8/D8 10 A9/D9 Figure 1. MC145026 Encoder Block Diagram SEQUENCER CIRCUIT Figure 2. MC145027 ...
Page 3
SEQUENCER CIRCUIT Figure 3. MC145028 Decoder Block Diagram MAXIMUM RATINGS* (Voltages Referenced Rating Symbol ...
Page 4
ELECTRICAL CHARACTERISTICS — MC145026 Symbol Characteristic Low–Level Output Voltage V OH High–Level Output Voltage V IL Low–Level Input Voltage (V out = 4.5 or 0.5 V) ...
Page 5
ELECTRICAL CHARACTERISTICS — MC145026 Symbol Characteristic Low–Level Output Voltage V OH High–Level Output Voltage V IL Low–Level Input Voltage (V out = 0 2.0 ...
Page 6
SWITCHING CHARACTERISTICS — MC145026*, MC145027, and MC145028 S Symbol b l Characteristic Ch t TLH , t THL Output Transition Time Rise Time — Decoders Fall Time — Decoders f osc Encoder ...
Page 7
ANY OUTPUT 10% t TLH Figure osc 50 Figure 6. MOTOROLA 90 THL 10% TE TEST POINT OUTPUT DEVICE UNDER TEST * Includes all probe and fixture ...
Page 8
OPERATING CHARACTERISTICS MC145026 The encoder serially transmits trinary data as defined by the state of the A1 – A5 and A6/D6 – A9/D9 input pins. These pins may be in either of three states (low, high, or open) allow- ing ...
Page 9
Resistor 1, Capacitor 1 (Pins shown in Figures 2 and 3, these pins accept a resistor and capacitor that are used to determine whether a narrow pulse or wide pulse has been ...
Page 10
This oscillator operates at a frequency determined by the external RC network; i.e (Hz) 2 for 1 kHz f 400 kHz where layout + 12 pF ...
Page 11
ENCODER OSCILLATOR (PIN 12) ENCODED “ONE” D out ENCODED (PIN 15) “ZERO” ENCODED “OPEN” 500 400 300 200 100 C layout (pF) ON PINS 1 – 5 (MC145027); PINS 1 – 5 AND 12 – 15 (MC145028) Figure 12. f ...
Page 12
NO THE TRANSMISSION MATCH THE PREVIOUSLY NO MC145026 MC145027 MC145028 SC41343 SC41344 12 HAS BEGUN? YES DOES DISABLE VT THE 5–BIT NO ON THE 1ST ADDRESS MATCH ADDRESS MISMATCH THE ADDRESS PINS? YES STORE THE 4–BIT DATA DOES DISABLE VT ...
Page 13
NO THE 2ND CONSECUTIVE NO MOTOROLA HAS THE TRANSMISSION BEGUN? YES DOES DISABLE VT ON THE 1ST THE ADDRESS NO ADDRESS MISMATCH MATCH THE AND IGNORE THE REST ADDRESS OF THIS WORD PINS? YES IS THIS AT LEAST NO MATCH ...
Page 14
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 (Pin 9). The R–C decay seen on C1 ...
Page 15
TRINARY A3 2 ADDRESSES MC145026 4–BIT D7 9 BINARY 10 D8 DATA layout + 12 pF ...
Page 16
APPLICATIONS INFORMATION INFRARED TRANSMITTER In Figure 18, the MC145026 encoder is set to run at an os- cillator frequency of about kHz. Thus, the time required for a complete two–word encoding sequence is about ...
Page 17
SEND TE MC145026 1000 pF 9 SWITCHES 220 k 100 k FOR APPROX. 4 kHz Figure 18. IRED Transmitter Using RC Oscillator to Generate Carrier Frequency V+ MC14011UB 1M X1 470 pF 470 pF Figure 19. ...
Page 18
2N5088 É É É É 100 OPTICAL FILTER 1 F 1N914 1N914 100 k – 1/4 MC34074 390 k FOR APPROX. 4 kHz 1000 pF 180 ...
Page 19
0.25 (0.010) SOG (SMALL OUTLINE GULL–WING) PACKAGE –A– –T– SEATING PLANE 0.25 (0.010 MOTOROLA PACKAGE ...
Page 20
SOG (SMALL OUTLINE GULL–WING) PACKAGE –A– –B– 16X 0.010 (0.25 14X K Motorola reserves the right to make changes without further notice to any products herein. Motorola makes ...