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MC74VHC595 Datasheet(PDF) 2 Page - Motorola, Inc |
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MC74VHC595 Datasheet(HTML) 2 Page - Motorola, Inc |
2 / 9 page MC74VHC595 MOTOROLA VHC Data – Advanced CMOS Logic DL203 — Rev 1 2 FUNCTION TABLE Oi Inputs Resulting Function Operation Reset (SCLR) Serial Input (SI) Shift Clock (SCK) Reg Clock (RCK) Output Enable (OE) Shift Register Contents Storage Register Contents Serial Output (SQH) Parallel Outputs (QA – QH) Clear shift register L X X L, H, ↓ L L U L U Shift data into shift register H D ↑ L, H, ↓ L D →SRA; SRN→SRN+1 U SRG→SRH U Registers remains unchanged H X L, H, ↓ X L U ** U ** Transfer shift register contents to storage register H X L, H, ↓ ↑ L U SRN³STRN * SRN Storage register remains unachanged X X X L, H, ↓ L * U * U Enable parallel outputs X X X X L * ** * Enabled Force outputs into high impedance state X X X X H * ** * Z SR = shift register contents D = data (L, H) logic level ↓ = High–to–Low * = depends on Reset and Shift Clock inputs STR = storage register contents U = remains unchanged ↑ = Low–to–High ** = depends on Register Clock input MAXIMUM RATINGS* Symbol Parameter Value Unit VCC DC Supply Voltage – 0.5 to + 7.0 V Vin DC Input Voltage – 0.5 to + 7.0 V Vout DC Output Voltage – 0.5 to VCC + 0.5 V IIK Input Diode Current – 20 mA IOK Output Diode Current ± 20 mA Iout DC Output Current, per Pin ± 25 mA ICC DC Supply Current, VCC and GND Pins ± 50 mA PD Power Dissipation in Still Air, SOIC Packages† TSSOP Package† 500 450 mW Tstg Storage Temperature – 65 to + 150 _C * Absolute maximum continuous ratings are those values beyond which damage to the device may occur. Exposure to these conditions or conditions beyond those indicated may adversely affect device reliability. Functional operation under absolute–maximum–rated conditions is not implied. †Derating — SOIC Packages: – 7 mW/ _C from 65_ to 125_C TSSOP Package: – 6.1 mW/ _C from 65_ to 125_C RECOMMENDED OPERATING CONDITIONS Symbol Parameter Min Max Unit VCC DC Supply Voltage 2.0 5.5 V Vin DC Input Voltage 0 5.5 V Vout DC Output Voltage 0 VCC V TA Operating Temperature, All Package Types – 40 + 85 _C tr, tf Input Rise and Fall Time VCC = 3.3V ±0.3V VCC =5.0V ±0.5V 0 0 100 20 ns/V This device contains protection circuitry to guard against damage due to high static voltages or electric fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to this high–impedance cir- cuit. For proper operation, Vin and Vout should be constrained to the range GND v (Vin or Vout) v VCC. Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or VCC). Unused outputs must be left open. |
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