74HC244D,653 Nexperia

74HC244 74HCT244 Octal buffer/line driver 3-state Rev. 7 27 July 2021 Product data sheet 1. General description The 74HC244 74HCT244 is an 8-bit buffer/line driver with 3-state outputs. The device can be used as two 4-bit buffers or one 8-bit buffer. The device 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 include clamp diodes that enable the use of current limiting resistors to interface inputs to voltages in excess of V . CC 2. Features and benefits Wide supply voltage range from 2.0 to 6.0 V CMOS low power dissipation High noise immunity Latch-up performance exceeds 100 mA per JESD 78 Class II Level B Input levels: For 74HC244: CMOS level For 74HCT244: TTL level Octal bus interface Non-inverting 3-state outputs Complies with JEDEC standards: JESD8C (2.7 V to 3.6 V) JESD7A (2.0 V to 6.0 V) ESD protection: HBM JESD22-A114F exceeds 2000 V MM JESD22-A115-A exceeds 200 V Multiple package options Specified from -40 C to +85 C and -40 C to +125 C 3. Ordering information Table 1. Ordering information Type number Package Temperature range Name Description Version 74HC244D -40 C to +125 C SO20 plastic small outline package 20 leads SOT163-1 body width 7.5 mm 74HCT244D 74HC244PW -40 C to +125 C TSSOP20 plastic thin shrink small outline package SOT360-1 20 leads body width 4.4 mm 74HCT244PW 74HC244BQ -40 C to +125 C DHVQFN20 plastic dual in-line compatible thermal SOT764-1 enhanced very thin quad flat package no leads 74HCT244BQ 20 terminals body 2.5 4.5 0.85 mmNexperia 74HC244 74HCT244 Octal buffer/line driver 3-state 4. Functional diagram 1A0 1Y0 2 18 1A1 1Y1 4 16 1Y2 1A2 6 14 1Y3 1A3 8 12 1OE 1 2A0 2Y0 17 3 2A1 2Y1 15 5 2A2 2Y2 13 7 2Y3 2A3 11 9 2OE 19 mna875 Fig. 1. Functional diagram 1 EN 18 2 16 4 14 6 2 18 17 3 1A0 1Y0 2A0 2Y0 8 12 4 15 16 5 1A1 1Y1 2A1 2Y1 19 EN 6 13 14 7 1A2 1Y2 2A2 2Y2 11 9 7 13 8 12 11 9 1A3 1Y3 2A3 2Y3 15 5 17 3 1 19 1OE 2OE mna874 mna873 Fig. 2. Logic symbol Fig. 3. IEC logic symbol 74HC HCT244 All information provided in this document is subject to legal disclaimers. Nexperia B.V. 2021. All rights reserved Product data sheet Rev. 7 27 July 2021 2 / 15