Datasheet MC145026, MC145027, MC145028 (NXP) - 2

Introduction
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. • Operating Temperature Range: - 40 to + 85°C • Very-Low Standby Current for the Encoder: 300 nA Maximum @ 25°C • Interfaces with RF, Ultrasonic, or Infrared Modulators and Demodulators • RC Oscillator, No Crystal Required • High External Component Tolerance; Can Use ± 5% Components • Internal Power-On Reset Forces All Decoder Outputs Low • Operating Voltage Range: MC145026 = 2.5 to 18 V MC145027, MC145028 = 4.5 to 18 V
MC145026 MC145027 MC145028 ENCODER DECODERS DECODERS
A1 V A1 V DD A1 VDD DD A2 D A2 A6 out A2 D6 A3 TE A3 D7 A3 A7 A4 R A4 A8 TC A4 D8 A5 C A5 A9 TC A5 D9 A6/D6 R R VT S R1 VT 1 A7/D7 A9/D9 C C R 1 R2/C2 1 2/C2 V V D SS A8/D8 VSS Din SS in
Figure 1. Pin Assignments MC145026, MC145027, MC145028 Technical Data, Rev. 4
2 Freescale Semiconductor Document Outline 1 Introduction 2 Electrical Specifications 3 Operating Characteristics 3.1 MC145026 3.2 MC145027 3.3 MC145028 4 Pin Descriptions 4.1 MC145026 Encoder 4.2 MC145027 and MC145028 Decoders 5 MC145027 and MC145028 Timing 6 Package Dimensions