Tony Joyner's question last week got me thinking...
How come the GTLP thresholds are commonly listed as Vref +/- 200mV while GTL
thresholds are Vref +/- 50mV?
Also, sometimes datasheets will show GTLP as Vref +/- 50mV. What gives here?
For example:
TI GTL1655, 16622, 16612 (LVTTL to GTL/GTL+ bus transceivers):
Vih min = Vref +50mV, Vil max = Vref-50mV
Fairchild GTLP6C816A, GTLP16T1655:
Vih min = Vref +50mV, Vil max = Vref-50mV
Xilinx Virtex (from SelectIO App Note):
GTL Vih min = Vref +50mV, Vil max = Vref-50mV
GTL+ Vih min = Vref +200mV, Vil max = Vref-200mV
Anybody know how this is supposed to work?
Thanks, Jack.......
--------------496C29059D79E13769DDB8B3
Content-Type: text/x-vcard; charset=us-ascii; name="vcard.vcf"
Content-Description: Card for Jack Marshall
Content-Disposition: attachment; filename="vcard.vcf"
Content-Transfer-Encoding: 7bit
begin: vcard
fn: Jack Marshall
n: Marshall;Jack
org: Acuson Computed Sonography
adr: http://www.acuson.com;;1220 Charleston Rd. M/S E-1;Mountain View;CA;94039;US
email;internet: [email protected]
title: Analog Design Engineer
tel;work: (650) 694-5941
tel;fax: (650) 969-2994
x-mozilla-cpt: ;0
x-mozilla-html: TRUE
version: 2.1
end: vcard
--------------496C29059D79E13769DDB8B3--
**** To unsubscribe from si-list: send e-mail to [email protected]. In the BODY of message put: UNSUBSCRIBE si-list, for more help, put HELP. si-list archives are accessible at http://www.qsl.net/wb6tpu/si-list ****