74LCX138TTR STMicroelectronics

74LCX138 Low voltage CMOS 3 to 8 line decoder (Inverter) with 5V tolerant inputs Features 5V tolerant inputs High speed: t = 6.7ns (Max) at V = 3V PD CC Power down protection on inputs and outputs Symmetrical output impedance: SO-16 TSSOP16 I = I = 24mA (Min) at V = 3V OH OL CC PCI bus levels guaranteed at 24mA Description Balanced propagation delays: t t The 74LCX138 is a low voltage CMOS 3 to 8 line PLH PHL decoder (inverting) fabricated with sub-micron Operating voltage range: 2 silicon gate and double-layer metal wiring C MOS V (Opr) = 2.0V to 3.6V CC technology. It is ideal for low power and high Pin and function compatible with speed 3.3V applications it can be interfaced to 74 series 138 5V signal environment for inputs. Latch-up performance exceeds If the device is enabled, 3 binary select inputs (A, 500mA (JESD 17) B and C) determine which one of the outputs will ESD performance: go low. If enable input G1 is held low or either G2A or G2B is held high, the decoding function is HBM > 2000V inhibited and all the 8 outputs go to high. (MIL STD 883 method 3015) MM > 200V Three enable inputs are provided to ease cascade connection and application of address decoders for memory systems. It has same speed performance at 3.3V than 5V AC/ACT family, combined with a lower power consumption. All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage. Order codes Part number Package Packaging 74LCX138MTR SO-16 Tape and reel 74LCX138TTR TSSOP16 Tape and reel July 2006 Rev 5 1/17 www.st.com 17 Obsolete Product(s) - Obsolete Product(s)Contents 74LCX138 Contents 1 Logic symbols and I/O equivalent circuit 3 2 Pin settings 4 2.1 Pin connection 4 2.2 Pin description 4 2.3 Truth table 5 2.4 Logic diagram . 5 3 Maximum rating . 6 3.1 Recommended operating conditions . 6 4 Electrical characteristics . 7 5 Test circuit . 9 6 Waveforms 10 7 Package mechanical data 11 8 Revision history . 16 2/17 Obsolete Product(s) - Obsolete Product(s)