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74VHC157MTC Datasheet(PDF) 1 Page - Fairchild Semiconductor |
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74VHC157MTC Datasheet(HTML) 1 Page - Fairchild Semiconductor |
1 / 10 page tm May 2007 ©1992 Fairchild Semiconductor Corporation www.fairchildsemi.com 74VHC157 Rev. 1.2 74VHC157 Quad 2-Input Multiplexer Features ■ High Speed: tPD = 4.1ns (Typ.) at VCC = 5V ■ Low power dissipation: ICC = 4µA (Max.) at TA = 25°C ■ High noise immunity: VNIH = VNIL = 28% VCC (Min.) ■ Power down protection is provided on all inputs ■ Low noise: VOLP = 0.8V (Max.) ■ Pin and function compatible with 74HC157 General Description The VHC157 is an advanced high speed CMOS Quad 2-Channel Multiplexer fabricated with silicon gate CMOS technology. It achieves the high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation. It consists of four 2-input digital multiplexers with com- mon select and enable inputs. When the ENABLE input is held “H” level, selection of data is inhibited and all the outputs become “L” level. The SELECT decoding deter- mines whether the I0x or I1x inputs get routed to their cor- responding outputs. An Input protection circuit ensures that 0V to 7V can be applied to the input pins without regard to the supply voltage. This device can be used to interface 5V to 3V systems and on two supply systems such as battery back up. This circuit prevents device destruction due to mismatched supply and input voltages. Ordering Information Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter “X” to the ordering number. Connection Diagram Pin Description Order Number Package Number Package Description 74VHC157M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow 74VHC157SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74VHC157MTC MTC16 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Pin Names Description I0a–I0d Source 0 Data Inputs I1a–I1d Source 1 Data Inputs E Enable Input S Select Input Za–Zd Outputs |
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