DAN-120 Datasheet, PDF (2/3 Pages) Exar Corporation – EXAR’S XR68C92/192 AND XR88C92/192 COMPARED

DATA COMMUNICATIONS APPLICATION NOTE
DAN120
1.4 SUMMARY OF DIFFERENCES
In the table below, some differences between the XR68C92/192, XR88C92/192 and SC28L92 are summa-
rized.
TABLE 1: DIFFERENCES BETWEEN EXAR’S XR68C92/192 AND XR88C92/192 WITH PHILIPS’S SC28L92
DIFFERENCES
XR68C92/192
XR88C92/192
SC28L92
Data Bus Standard
Motorola Only
Intel Only
Motorola and Intel
Max Operating Current @ 3.3/5 V
3 / 6 mA
3 / 6 mA
5 / 25 mA
Max Frequency on XTAL1
24 MHz
24 MHz
8 MHz
Max Data Rate
1 Mbps
1 Mbps
1 Mbps
Operating Temperature Range
Commercial and Industrial Commerical and Industrial
Industrial Only
Package
44-TQFP, 44-PLCC,
40-PDIP
44-TQFP, 44-PLCC,
40-PDIP
44-QFP, 44-PLCC
44-(T)QFP package thickness
1.4 mm
1.4 mm
1.75 mm
44-(T)QFP package max lead lengths
0.75 mm
0.75 mm
0.95 mm
TX FIFO Size
8 (XR68C92)
16 (XR68C192)
8 (XR88C92)
16 (XR88C192)
8 (MR0 bit-3 = 0)
16 (MR0 bit-3 = 1)
RX FIFO Size
8 (XR68C92)
16 (XR68C192)
8 (XR88C92)
16 (XR88C192)
8 (MR0 bit-3 = 0)
16 (MR0 bit-3 = 1)
TX FIFO Trigger Levels
8, 4, 6, 1 (XR68C92)
8, 4, 6, 1 (XR88C92) 8, 4, 6, 1 (MR0 bit-3 = 0)
16, 8, 12, 1(XR68C192) 16, 8, 12, 1(XR88C192) 16, 8, 12, 1 (MR0 bit-3 = 1)
RX FIFO Trigger Levels
1, 3, 6, 8 (XR68C92)
1, 3, 6, 8 (XR88C92) 1, 3, 6, 8 (MR0 bit-3 = 0)
1, 6, 12, 16 (XR68C192) 1, 6, 12, 16 (XR88C192) 1, 8, 12, 16 (MR0 bit-3 = 1)
Multi-drop Mode
Extra Storage for 9th bit Extra Storage for 9th bit Extra Storage for 9th bit
(Address/Data Bit)
(Address/Data Bit)
Not Available
1.5 REPLACING THE SC28L92 WITH THE XR68C92/192 OR XR88C92/192
You can directly replace the Philips SC28L92 with either the Exar XR68C92/192 or XR88C92/192 without any
hardware changes as described in the hardware differences section above.
The XR68C92/192 and XR88C92/192 are available in both the commercial grade and industrial grade packag-
es unlike the SC28L92 that is only available in the industrial grade packages. Also, the XR68C92/192 and
XR88C92/192 has a lower power consumption than the SC28L92 at 3.3 and 5 V.
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