SN54LVC646A

www.ti.com FEATURES Operate From 1.65 V to 3.6 V Inputs Accept Voltages to 5.5 V Max tpd of 7.4 ns at 3.3 V Typical VOLP (Output Ground Bounce) <0.8 at VCC = 3.3 V, TA = 25°C Typical VOHV (Output VOH Undershoot) >2 V at VCC = 3.3 V, TA = 25°C Support Mixed-Mode Signal Operation on All Ports (5-V Input/Output Voltage With 3.3-V VCC) SN54LVC646A . . . JT OR W PACKAGE SN74LVC646A . . . DB, DW, NS, OR PW PACKAGE (TOP VIEW) CLKAB 1 SAB 2 DIR 3 A1 4 A2 5 A3 6 A4 7 A5 8 A6 9 A7 10 A8 11 GND 12 24 VCC 23 CLKBA 22 SBA 21 OE 20 B1 19 B2 18 B3 17 B4 16 B5 15 B6 14 B7 13 B8 SN54LVC646A, SN74LVC646A OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SCAS302J – JANUARY 1993 – REVISED AUGUST 2005 Ioff Supports Partial-Power-Down Mode Operation Latch-Up Performance Exceeds 250 mA Per JESD 17 ESD Protection Exceeds JESD 22 – 2000-V Human-Body Model (A114-A) – 200-V Machine Model (A115-A) – 1000-V Charged-Device Model (C101) xxxx SN54LVC646A . . . FK PACKAGE (TOP VIEW) DIR SAB CLKAB NC VCC CLKBA SBA 4 3 2 1 28 27 26 A1 5 25 OE A2 6 24 B1 A3 7 23 B2 NC 8 22 NC A4 9 21 B3 A5 10 20 B4 A6 1112 13 14 15 16 17 1819 B5 A7 A8 GND NC B8 B7 B6 NC - No internal connection DESCRIPTION/ORDERING INFORMATION The SN54LVC646A octal bus transceiver and register is designed for 2.7-V to 3.6-V VCC operation, and the SN74LVC646A octal bus transceiver and register is designed for 1.65-V to 3.6-V VCC operation. TA –40°C to 85°C –55°C to 125°C SOIC – DW SOP – NS SSOP –...