FSTD16450

Features:

4switch connection between two ports
Voltage level shifting
Minimal propagation delay through the switch
 Low l_CC
Zero bounce in flow-through mode
Control inputs compatible with TTL level
Also packaged in plastic Fine-Pitch Ball Grid Array(FBGA) (Preliminary)

Application

Select pins S0, S1, S2 are intended to be used as static user configurable control pins. The AC performance of these pins has not been characterized or tested. Switching of these select pins during system operation may tempo- rarily disrupt output logic states and/or enable pin controls.


Pinout




Specifications

Supply Voltage (V_CC)................ ..............−0.5V to +7.0V
DC Switch Voltage (V_S) (Note 3) .............−0.5V to +7.0V
DC Input Control Pin Voltage 
(V_IN) (Note 4) ........................................  −0.5V to +7.0V
DC Input Diode Current (l _IK) V_IN  < 0V ............ ..−50 mA
DC Output (IOUT) Current .................................. 128 mA
DC V_CC/GND Current (I_CC/I_GND) +/..................  − 100 mA
Storage Temperature Range (_TSTG) ......−65 to +150   


Description

The Fairchild Universal Bus Switch FSTD16450 provides 4-bit, 5-bit, 8-bit, 10-bit, 16-bit, 20-bit of high-speed CMOS TTL-compatible bus switching. The low on resistance of the switch allows inputs to be connected to outputs without adding propagation delay or generating additional ground bounce noise.

The FSTD16450 is designed to allow "customer" configura- tion control of the enable connections. The FSTD16450 is orga- nized as either a 4-bit, 5-bit, 10-bit or 20-bit bus switch. 8- bit and 16-bit configurations are also achievable (see Func- tional Description). The device's bit configuration is chosen through select pin logic. (see Truth Table). When OE  is LOW, Port A  is connected to Port B . When OE  is HIGH, the switch is OPEN.

Another key FSTD16450 feature is the addition of a level shifting select pin, "S ". When S  is LOW, the device behaves as a standard N-MOS switch. When S  is HIGH, a diode to V_CC is integrated into the circuit allowing for level shifting between 5V inputs and 3.3V outputs.