1. General description
The 74LVT16646A is a high-performance BiCMOS product designed for V
CC
operation at
3.3 V. This device is a 16-bit transceiver featuring non-inverting 3-state bus compatible
outputs in both send and receive directions. The control function implementation
minimizes external timing requirements. The device features an output enable (OE) input
for easy cascading and a direction (DIR) input for direction control.
Data on bus A or bus B is clocked into the registers on the LOW-to-HIGH transition of the
appropriate clock (CPAB or CPBA). The select control (SAB and SBA) inputs can
multiplex stored and real-time (transparent mode data).
2. Features
a73 16-bit universal bus interface
a73 3-state buffers
a73 Output capability: from +64 mA to −32 mA
a73 TTL input and output switching levels
a73 Input and output interface capability to systems at 5 V supply
a73 Bus-hold data inputs eliminate the need for external pull-up resistors to hold unused
inputs
a73 Live insertion and extraction permitted
a73 No bus-current loading when output is tied to 5 V bus
a73 Power-up reset
a73 Power-up 3-state
a73 Latch-up protection exceeds 500 mA per JESD78
a73 ESD protection:
a78 MIL STD 883 Method 3 015: exceeds 2000 V
a78 Machine model: exceeds 200 V
74LVT16646A
3.3 V 16-bit bus transceiver; 3-state
Rev. 03 — 12 January 2005 Product data sheet