AT16646

Features:

` Fastest Propagation Speeds in the Industry T<sub>PD (F grade)</sub> = 2.5 ns, T<sub>PD (G grade)</sub> = 2.0 ns
` Maximum derating for capacitive loads 1.5ns/100 pF (F grade) and 1.1ns/100 pF (G grade)
` Very low ground bounce < 0.6 V @ V<sub>CC</sub>=5.00 V, T<sub>a</sub>=25°C
` Typical output skew 0.25ns
` Bus Hold circuitry to retain last active state during Tri-State<sup>TM</sup>
` Available in SSOP and TSSOP packages


Pinout




Specifications

Operating Temperature...........................0°C to +70°C Storage Temperature ...................... -65°C to +150°C Voltage on any Pin with Respect to Ground.......................-2.0V to +7.0V(1) Maximum Operating Voltage...................................6.0V

Description

Atmel's AT16646 devices are 16-bit high speed, low power Tri-statable D type registers, ideal for use in systems requiring both transparent and registered mode functions. They are organized as two separate 8-bit bus tran-sceivers. Data flow of AT16646 is bidirectional, and can be controlled for multiplexed transmission between A bus and B bus either directly or from the D registers by use of the direction control pin (xDir), output enable (xOE), and select lines (xSAB and xSBA). Storage of data on the A bus and B bus is controlled by the output pins. AT16646 have very low gr-ound bounce and excellent input noise rejection, giving the user stable signals in a high speed environment. The Bus Hold feature eliminates the need for pull-up or pull-down resistors and retains the last active state during a Tri-State event.