SN54HC643

The SN54HC643 is a kind of octal bus transceiver which is designed for asvnchronous two-way communication between data buses.The SN54HC643 transmit data from the A bus to the B bus or from the B bus to the A bus depending upon the level at the direction control(DIR) input.

Features of of the SN54HC643 are:(1)choice of true or invarting logle; (2)high-current 3-state outputs can drive up to 15 LSTTL loads; (3)package options include plastic"small outline"packages, ceramic chip carriers and standard plastic and ceramic 300-mil DIPs; (4)dependable texas instruments quality and reliability.

The absolute maximum ratings of the SN54HC643 can be summarized as:(1): DC supply-voltage(Vcc) is -0.5 V to 7 V; (2):input diode current, IIK( for Vi<0 V or Vi>Vcc) is ±20 mA; (3): output diode current, IOK(for Vo<0 V or Vo>Vcc) is ±20 mA; (4): continous output current, IO(Vo is 0 to Vcc) is ±35 mA; (5): storage temperature(Tstg) is  -66 to +150.