74HC243N

74HC243 Quad bus transceiver; 3-state Rev. 03 12 November 2004 Product data sheet 1. General description The 74HC243 is a high-speed Si-gate CMOS device and is pin compatible with low power Schottky TTL (LSTTL). The 74HC243 is specied in compliance with JEDEC standard no. 7A. The 74HC243 is a quad bus transceiver featuring non-inverting 3-state bus compatible outputs in both send and receive directions. The 74HC243 is designed for 4-line asynchronous 2-way data communications between data buses. The output enable inputs (OEA and OEB) can be used to isolate the buses. The 74HC243 is similar to the 74HC242 but has non-inverting (true) outputs. 2. Features Non-inverting 3-state outputs 2-way asynchronous data bus communication Low-power dissipation Complies with JEDEC standard no. 7A ESD protection: HBM EIA/JESD22-A114-B exceeds 2000 V MM EIA/JESD22-A115-A exceeds 200 V. Multiple package options Specied from - 40 Cto+80 C and from - 40 C to +125 C.74HC243 Philips Semiconductors Quad bus transceiver; 3-state 3. Quick reference data Table 1: Quick reference data GND = 0 V; T =25 C; t =t = 6 ns. amb r f Symbol Parameter Conditions Min Typ Max Unit t , t propagation delay An to Bn; C = 15 pF; V = 5 V - 6 - ns PHL PLH L CC Bn to An C input capacitance - 3.5 - pF I C input/output capacitance - 10 - pF I/O [1] C power dissipation V = GND to V -26 - pF PD I CC capacitance per transceiver [1] C is used to determine the dynamic power dissipation (P in W). PD D 2 2 P =C V f N+ (C V f ) where: D PD CC i L CC o f = input frequency in MHz; i f = output frequency in MHz; o C = output load capacitance in pF; L V = supply voltage in V; CC N = number of inputs switching; 2 (C V f ) = sum of outputs. L CC o 4. Ordering information Table 2: Ordering information Type number Package Temperature range Name Description Version 74HC243N - 40 C to +125 C DIP14 plastic dual in-line package; 14 leads (300 mil) SOT27-1 74HC243D - 40 C to +125 C SO14 plastic small outline package; 14 leads; SOT108-1 body width 3.9 mm 74HC243DB - 40 C to +125 C SSOP14 plastic shrink small outline package; 14 leads; SOT337-1 body width 5.3 mm 9397 750 13808 Koninklijke Philips Electronics N.V. 2004. All rights reserved. Product data sheet Rev. 03 12 November 2004 2 of 17