1FEATURES

· Operates 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

· Supports Mixed-Mode Signal Operation on All

Ports (5-V Input/Output Voltage With

3.3-V VCC)

· 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)

· Rad Tolerant: 50kRad (Si) TID (1)

– TID Dose Rate 0.10 rad/s

· QML-V Qualified, SMD 5962-97626

(1) Radiation tolerance is a typical value based upon initial device

qualification. Radiation Lot Acceptance Testing is available –

contact factory for details.

DESCRIPTION/ORDERING INFORMATION

The SN54LVC646A octal bus transceiver and register is designed for 2.7-V to 3.6-V VCC operation.

This device consists of bus-transceiver circuits, D-type flip-flops, and control circuitry arranged for multiplexed

transmission of data directly from the input bus or from the internal registers. Data on the A or B bus is clocked

into the registers on the low-to-high transition of the appropriate clock (CLKAB or CLKBA) input. Figure 1 shows

the four fundamental bus-management functions that are performed with the SN54LVC646A device.