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MT8981DE Datasheet(PDF) 3 Page - Mitel Networks Corporation |
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MT8981DE Datasheet(HTML) 3 Page - Mitel Networks Corporation |
3 / 18 page ISO-CMOS MT8981D 2-19 22- 24 25- 27 D7-D5 Data 7 to 5 (Three-state I/O Pins). These are the bidirectional data pins on the microprocessor interface. 25- 29 29- 33 D4-D0 Data 4 to 0 (Three-state I/O Pins). These are the bidirectional data pins on the microprocessor interface. 30 34 VSS Power Input. Negative Supply (Ground). 31- 34 35- 38 IC Internal Connections. Leave pins disconnected. 35 39 STo3 ST-BUS Output 3 (Three-state Outputs). These are the pins for the four 2048 kbit/s ST- BUS output streams. 36- 38 41- 43 STo2- STo0 ST-BUS Output 2 to 0 (Three-state Outputs). These are the pins for the four 2048 kbit/s ST-BUS output streams. 39 44 ODE Output Drive Enable (Input). If this input is held high, the STo0-STo3 output drivers function normally. If this input is low, the STo0-STo3 output drivers go into their high impedance state. NB: Even when ODE is high, channels on the STo0-STo3 outputs can go high impedance under software control. 40 1 IC Internal Connection. Leave pin disconnected. Pin Description (continued) Pin # Name Description 40 DIP 44 PLCC |
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