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74LVCH8T245PW 데이터시트(PDF) 4 Page - NXP Semiconductors |
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4 / 28 page 74LVC_LVCH8T245 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 3 — 12 December 2011 4 of 28 NXP Semiconductors 74LVC8T245; 74LVCH8T245 8-bit dual supply translating transceiver; 3-state 5.2 Pin description [1] All GND pins must be connected to ground (0 V). 6. Functional description [1] H = HIGH voltage level; L = LOW voltage level; X = don’t care; Z = high-impedance OFF-state. [2] The An inputs/outputs, DIR and OE input circuit is referenced to VCC(A); The Bn inputs/outputs circuit is referenced to VCC(B). [3] If at least one of VCC(A) or VCC(B) is at GND level, the device goes into suspend mode. 7. Limiting values Table 2. Pin description Symbol Pin Description VCC(A) 1 supply voltage A (An inputs/outputs, OE and DIR inputs are referenced to VCC(A)) DIR 2 direction control A1 to A8 3, 4, 5, 6, 7, 8, 9, 10 data input or output GND[1] 11 ground (0 V) GND[1] 12 ground (0 V) GND[1] 13 ground (0 V) B1 to B8 21, 20, 19, 18, 17, 16, 15, 14 data input or output OE 22 output enable input (active LOW) VCC(B) 23 supply voltage B (Bn inputs/outputs are referenced to VCC(B)) VCC(B) 24 supply voltage B (Bn inputs/outputs are referenced to VCC(B)) Table 3. Function table[1] Supply voltage Input Input/output[3] VCC(A), VCC(B) OE[2] DIR[2] An[2] Bn[2] 1.2 V to 5.5 V L L An = Bn input 1.2 V to 5.5 V L H input Bn = An 1.2 V to 5.5 V H X Z Z GND[3] XXZ Z Table 4. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V). Symbol Parameter Conditions Min Max Unit VCC(A) supply voltage A 0.5 +6.5 V VCC(B) supply voltage B 0.5 +6.5 V IIK input clamping current VI <0V 50 - mA VI input voltage [1] 0.5 +6.5 V IOK output clamping current VO <0V 50 - mA VO output voltage Active mode [1][2][3] 0.5 VCCO +0.5 V Suspend or 3-state mode [1] 0.5 +6.5 V IO output current VO =0Vto VCCO [2] - 50 mA ICC supply current ICC(A) or ICC(B); per VCC pin - 100 mA |
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