Dear Nico, I would advice you to go for a CPLD or FPGA solution instead of interfacing with a bidirectional buffer. Inside the CPLD you can have a tristate logic which controls the bidirectional I/O depending on the mode. -----I>----- ! ! !--<I-! These two buffers mentioned in the figure should be switched on(enabled) or off(disabled) depending on the mode read or write. Depending on you needs you can add as many as you need for each bidirectional line. Let me know if this is the one you are looking for.. regards Hariharan -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Nico Fleurinck Sent: Friday, January 17, 2003 4:32 PM To: 'compactPCI (E-mail)'; 'si-list' Subject: [SI-LIST] bidirectional line driver needed Importance: High Dear experts, For a project I'm currently working on I need have a component or components to make a bidirectional line. I don't have a direction control signal for those line, so a transceiver (with direction control) is not a solution. The reason I need this is to have the possibility to desite during testing that sone parallel I/O signals or input OR output. For example: during test 1 is PIO1 an input and during test 2 it is an output, do you understand? If you have a solution for my problem please let me know. The signals are slow changing signals, so no high speed lines!!! The PIO's will be only used during debugging and testing of the system. Best regards, Nico Nico Fleurinck Junior Design Engineer VERHAERT Satellites & Platforms Hogenakkerhoekstraat 21 B-9150 Kruibeke Tel : +32 3 250.1984 Fax : +32 3 254.1008 e-mail : nico.fleurinck@xxxxxxxxxxxx Visit us : www.verhaert.com ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu