74AHCT240BQ,115 Nexperia

74AHCT240 Octal buffer/line driver inverting 3-state Rev. 6 29 June 2020 Product data sheet 1. General description The 74AHCT240 is an 8-bit inverting buffer/line driver with 3-state outputs. This device can be used as two 4-bit buffers or one 8-bit buffer. It features two output enables (1OE and 2OE), each controlling four of the 3-state outputs. A HIGH on nOE causes the outputs to assume a high-impedance OFF-state. Inputs are over voltage tolerant. This feature allows the use of these devices as translators in mixed voltage environments. 2. Features and benefits Balanced propagation delays All inputs have a Schmitt-trigger action Inputs accepts voltages higher than V CC Operates with TTL input levels ESD protection: HBM JESD22-A114F exceeds 2000 V CDM JESD22-C101D exceeds 1000 V Multiple package options Specified from -40 C to +85 C and from -40 C to +125 C 3. Ordering information Table 1. Ordering information Type number Package Temperature range Name Description Version 74AHCT240D -40 C to +125 C SO20 plastic small outline package 20 leads SOT163-1 body width 7.5 mm 74AHCT240PW -40 C to +125 C TSSOP20 plastic thin shrink small outline package 20 leads SOT360-1 body width 4.4 mm 74AHCT240BQ -40 C to +125 C DHVQFN20 plastic dual in-line compatible thermal enhanced SOT764-1 very thin quad flat package no leads 20 terminals body 2.5 4.5 0.85 mmNexperia 74AHCT240 Octal buffer/line driver inverting 3-state 4. Functional diagram 1 EN 2 18 16 4 2 1A0 1Y0 18 14 6 3 17 2A0 2Y0 8 12 4 1A1 1Y1 16 15 2A1 5 2Y1 19 EN 6 1A2 1Y2 14 13 2A2 2Y2 7 11 9 8 1Y3 12 1A3 13 7 9 11 2A3 2Y3 15 5 17 3 1 1OE 19 2OE mgu779 mgu778 Fig. 1. Logic symbol Fig. 2. IEC logic symbol 5. Pinning information 5.1. Pinning 74AHCT240 terminal 1 index area 1A0 2 19 2OE 2Y0 3 18 1Y0 1A1 4 17 2A0 74AHCT240 2Y1 5 16 1Y1 1OE 1 20 V CC 1A2 6 15 2A1 1A0 2 19 2OE 2Y2 7 14 1Y2 2Y0 3 18 1Y0 (1) 1A3 8 13 2A2 GND 1A1 4 17 2A0 2Y3 9 12 1Y3 2Y1 5 16 1Y1 1A2 6 15 2A1 001aal193 2Y2 7 14 1Y2 1A3 8 13 2A2 Transparent top view 2Y3 9 12 1Y3 (1) This is not a ground pin. There is no electrical or GND 10 11 2A3 mechanical requirement to solder the pad. In case 001aal192 soldered, the solder land should remain floating or connected to GND. Fig. 3. Pin configuration SOT163-1 (SO20) and SOT360-1 (TSSOP20) Fig. 4. Pin configuration SOT764-1 (DHVQFN20) 74AHCT240 All information provided in this document is subject to legal disclaimers. Nexperia B.V. 2020. All rights reserved Product data sheet Rev. 6 29 June 2020 2 / 13 GND 10 1 1OE 2A3 11 20 V CC