General Description Features The LMC6008 octal buffer is designed specifically to buffer the multi-level voltages going to the inputs of the integrated circuits. The LMC6008 AC characteristics, including settling time, are specified for a capacitive load of 0.1 mF for this reason. The LMC6008 contains 4 high-speed buffers and 4 lowpower buffers. The high-speed buffers can provide an output current of at least 250 mA (minimum), and the low-power buffers can provide at least 150 mA (minimum). By including the 2 types of buffers, the LMC6008 is able to provide this function while consuming a supply current of only 6.5 mA (maximum). The buffers are a rail-to-rail design, which typically swing to within 30 mV of either supply. The LMC6008 also contains a standby function which puts the buffer into a high-impedance mode. The supply current in the standby mode is a low 500 mA max. Also, a thermal limit circuit is included to protect the device from overload conditions. Y Connection Diagram Ordering Information Y Y Y Y Y Y High Output Current: High Speed Buffers Low Power Buffers Slew Rate: High Speed Buffers Low Power Buffers Settling Time, CL e 0.1 mF Wide Input/Output Range Supply Voltage Range Supply Current Standby Mode Current Y Y AMLCD voltage buffering Multi-voltage buffering Temperature Range NSC Transport b 40§ C to a 85§ C Drawing Media 24-Pin LMC6008IM Surface Mount LMC6008IMX TL/H/12321 – 1 Top View Note: Buffers 1, 3, 5 and 7 are High Speed and Buffers 2, 4, 6 and 8 are Low Speed. C1996 National Semiconductor Corporation TL/H/12321 1.7 V/ms 0.85V/ms 16 ms max 0.1V to VCC b 0.1V min 5V to 16V 6.5 mA max 500 mA Applications Package 24-Pin SO 250 mA min 150 mA min RRD-B30M56/Printed in U. S. A. M24B Rail M24B Tape & Reel 8 Channel Buffer LMC6008 8 Channel Buffer LMC6008 April 1996 Absolute Maximum Ratings (Note 1) Operating Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Supply Voltage Temperature Range ESD Tolerance (Note 2) Voltage at Input Pin Thermal Resistance (iJA) M Package, 24-Pin Surface Mount 2000V Va a Voltage at Output Pin Supply Voltage (V a b Vb) Lead Temperature (soldering, 10 sec.) Va 4.5V s V a s 16V b 20§ C to a 100§ C 50§ C/W Vb b 0.4V, 0.4V a 0.4V, V b b 0.4V 16V 260§ C Storage Temperature Range Junction Temperature (Note 4) Power Dissipation (Note 4) b 55§ C to a 150§ C 150§ C Internally Limited DC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ e 25§ C, VCC e 14.5V and RL e 0. Symbol Parameter VOS Input Offset Voltage AV VO e 10 VPP IB Input Bias Current ILP Peak Load Current Conditions Typ (Note 5) RS e 10 kX LMC6008 Limit (Note 6) Units 25 mV max 0.985 V/V 300 nA max Hi Speed Buffers VO e 13 VPP b 250 mA max a 250 mA min Lo Speed Buffers VO e 13 VPP b 150 mA max a 150 mA min ILP Peak Load Current VERR Output Voltage Difference (Note 9) VIH Standby Logic HIgh Voltage 3.30 V min VIL ISTANDBY Logic Low Voltage 1.80 V max IIH Standby High Input Current 1.0 mA max IIL Standby Low Input Current 1.0 mA max 35 mV max IO (STD-BY) Output Leakage Current VSTD-BY e High 5 mA max ICC Supply Current VIL e Low, VIN e 7.25V 6.5 mA max ISTD-BY Standby Current VSTD-BY e High 500 mA max PSRR Power Supply Rejection Ratio 5V k VCC k 14.5V 55 dB min VO Voltage Output Swing http://www.national.com 2 0.1 V min VCC b 0.1 V max AC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ e 25§ C, VCC e 14.5V and RL e 0X. Symbol SR Parameter Slew Rate tS Settling Time tON Standby Response Time ON tOFF Standby Response Time OFF PBW Power Bandwidth CL Conditions Typ (Note 5) LMC6008 Limit (Note 6) Units Buffers 1, 3, 5, 7 (Note 3) 1.70 V/ms min Buffers 2, 4, 6, 8 (Note 3) 0.85 V/ms min (Notes 3, 7) VO e 10 VPP for Hi-Speed VO e 5 VPP for Lo-Speed (Note 3) Load Capacitance 16 ms max 10 ms max 10 ms max 45 KHz min 0.1 mF max Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating ratings indicate conditions for which the device is intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics. Note 2: Human body model, 1.5 kX in series with 100 pF. Note 3: The Load is a series connection of a 0.1 mF capacitor and a 1X resistor. Note 4: The maximum power dissipation is a function of TJ(max), iJA, and TA. The maximum allowable power dissipation at any ambient temperature is PD e (TJ(max) b TA)/iJA, where the junction-to-ambient thermal resistance iJA e 50§ C/W. If the maximum allowable power dissipation is exceeded, the thermal limit circuit will limit the die temperature to approximately 160§ C. All numbers apply for packages soldered directly into a PC board. Note 5: Typical Values represent the most likely parametric norm. Note 6: All limits are guaranteed by testing or statistical analysis. Note 7: The settling time is measured from the input transition to a point 50 mV of the final value, for both rising and falling transitions. The input swing is 0.5V to 13.5V for buffers 1, 3, 5, 7 and 3.75V to 10.25V for buffers 2, 4, 6, 8. Input rise time should be less than 1 ms. Note 8: High-Speed Buffers are 1, 3, 5, 7 and Low-Speed Buffers are 2, 4, 6, 8. Note 9: Output Voltage Difference is the difference between the highest and lowest buffer output voltage when all buffer inputs are at identical voltages. 3 http://www.national.com 8 Channel Buffer LMC6008 Physical Dimensions inches (millimeters) unless otherwise noted 24-Lead (3.00× Wide) Small Outline Molded Package (M) Order Number LMC6008IM or LMC6008IMX NS Package Number M24B LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 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