XR16L2450 Datasheet, PDF (30/30 Pages) Exar Corporation – 2.25V TO 5.5V DUART

XR16L2450
REV. 1.1.0
xr
2.25V TO 5.5V DUART
DC ELECTRICAL CHARACTERISTICS ..............................................................................................................21
AC ELECTRICAL CHARACTERISTICS ..............................................................................................................22
Unless otherwise noted: TA=-40o to +85oC, Vcc is 2.25V to 5.5V, .......................................................................... 22
70 PF LOAD WHERE APPLICABLE ...................................................................................................................22
FIGURE 8. CLOCK TIMING............................................................................................................................................................... 23
FIGURE 9. MODEM INPUT/OUTPUT TIMING FOR CHANNELS A & B ................................................................................................... 23
FIGURE 11. DATA BUS WRITE TIMING............................................................................................................................................. 24
FIGURE 10. DATA BUS READ TIMING .............................................................................................................................................. 24
FIGURE 12. INTERRUPT TIMING FOR CHANNELS A & B .................................................................................................................... 25
FIGURE 13. INTERRUPT TIMING FOR CHANNELS A & B .................................................................................................................... 25
PACKAGE DIMENSIONS (48 PIN TQFP - 7 X 7 X 1 MM)...............................................26
PACKAGE DIMENSIONS (44 PIN PLCC) .......................................................................27
REVISION HISTORY.......................................................................................................................................28
TABLE OF CONTENTS ............................................................................................................ I
II