collins@vicom.com (Tracy Collins) (07/20/90)
Specifically, I am looking for a pin-compatible replacement for an F245 octal transceiver. Requirements are: B bus must handle 64 mA A bus must handle 20 mA B bus has low (~3 V) voltage swing prop delay of 7 ns, max. As you may have guessed, I need this part to reduce noise on a backplane by reducing the voltage swing of the backplane signals. The other possibility of reducing the noise is to slow the edge rate. Are there transceivers with edge rate (slew rate) control, pin-compatible with the 245? Any info is greatly appreciated. thanks tracy -- tracy collins vicom systems, inc. "Even though you don't think it's right, collins@vicom.com I _like_ to bite." - Humpty w:(415)498-3280
BENJY@mathom.cisco.com (Benjy Levy) (07/20/90)
Look at the IDT limited swing families. 74FCTXXXT 74FCTXXXAT and 74FCTXXXCT. Varying speeds are available with the current spec you want. Benjy Levy
richm@amc-gw.amc.com (Rich Moran) (07/23/90)
In article <1990Jul19.172230.9515@vicom.com> collins@vicom.com (Tracy Collins) writes: }Specifically, I am looking for a pin-compatible replacement for }an F245 octal transceiver. } }Requirements are: } } B bus must handle 64 mA } A bus must handle 20 mA } B bus has low (~3 V) voltage swing } prop delay of 7 ns, max. } }As you may have guessed, I need this part to reduce noise }on a backplane by reducing the voltage swing of the backplane }signals. The other possibility of reducing the noise is to }slow the edge rate. Are there transceivers with edge rate }(slew rate) control, pin-compatible with the 245? National Semiconductor has a family they call the 'Quiet' series, which is a BiCMOS process with controlled edge rates and ~3V swing. I believe that performance is similar to FAST parts. ============================================= Rich Moran richm@amc.com ============================================= -- ============================================= Rich Moran richm@amc.com =============================================