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74LCX32500 Scheda tecnica(PDF) 2 Page - Fairchild Semiconductor |
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74LCX32500 Scheda tecnica(HTML) 2 Page - Fairchild Semiconductor |
2 / 8 page www.fairchildsemi.com 2 Connection Diagram (Top Thru View) Truth Table (Note 4) H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial (HIGH or LOW, inputs may not float) Z = High Impedance Note 4: A-to-B data flow is shown: B-to-A flow is similar but uses OEBA, LEBA, and CLKBA. Note 5: Output level before the indicated steady-state input conditions were established. Note 6: Output level before the indicated steady-state input conditions were established, provided that CLKAB was LOW before LEAB went LOW. Pin Descriptions FBGA Pin Assignments Functional Description For A-to-B data flow, the LCX32500 operates in the trans- parent mode when LEAB is HIGH. When LEAB is LOW, the A data is latched if CLKAB is held at a HIGH or LOW logic level. If LEAB is LOW, the A bus data is stored in the latch/flip-flop on the HIGH-to-LOW transition of CLKAB. Output-enable OEAB is active-HIGH. When OEAB is HIGH, the outputs are active. When OEAB is LOW, the out- puts are in the high impedance state. Data flow for B to A is similar to that of A to B but uses OEBA, LEBA, and CLKBA. The output enables are com- plementary (OEAB is active HIGH and OEBA is active LOW). Inputs Output OEABn LEABn CLKABn An Bn LX X X Z HH X L L HH X H H HL ↓ LL HL ↓ HH HL H X B0 (Note 5) HL L X B0 (Note 6) Pin Names Description 1A1 - 1A18 Data Register A Inputs/3-STATE Outputs 2A1 - 2A18 1B1 - 1B18 Data Register B Inputs/3-STATE Outputs 2B1 - 2B18 CLKAB1, CLKBA1 Clock Pulse Inputs CLKAB2, CLKBA2 LEAB1, LEBA1 Latch Enable Inputs LEAB2, LEBA2 OEAB1, OEBA1 Output Enable Inputs OEAB2, OEBA2 12 3 4 5 6 A 1A2 1A1 LEAB1 CLKAB1 1B1 1B2 B 1A4 1A3 OEAB1 GND 1B3 1B4 C 1A6 1A5 GND GND 1B5 1B6 D 1A8 1A7 VCC VCC 1B7 1B8 E 1A10 1A9 GND GND 1B9 1B10 F 1A12 1A11 GND GND 1B11 1B12 G 1A14 1A13 VCC VCC 1B13 1B14 H 1A15 1A16 GND GND 1B16 1B15 J 1A17 1A18 OEBA1 CLKBA1 1B18 1B17 K NC LEAB2 LEBA1 GND CLKAB2 NC L 2A2 2A1 OEAB2 GND 2B1 2B2 M 2A4 2A3 GND GND 2B3 2B4 N 2A6 2A5 VCC VCC 2B5 2B6 P 2A8 2A7 GND GND 2B7 2B8 R 2A10 2A9 GND GND 2B9 2B10 T 2A12 2A11 VCC VCC 2B11 2B12 U 2A14 2A13 GND GND 2B13 2B14 V 2A15 2A16 OEBA2 CLKBA2 2B16 2B15 W 2A17 2A18 LEBA2 GND 2B18 2B17 |
Codice articolo simile - 74LCX32500 |
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Descrizione simile - 74LCX32500 |
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