TL16C451 Datasheet, PDF (8/23 Pages) Texas Instruments – ASYNCHRONOUS COMMUNICATIONS ELEMENTS

TL16C451, TL16C452
ASYNCHRONOUS COMMUNICATIONS ELEMENTS
SLLS053C – MAY 1989 – REVISED AUGUST 1999
tcW
tw1
tw2
tw5
tw6
twRST
tsu1
tsu2
tsu3
th1
th2
th3
td3
td4
Cycle time, write (tw6 + td5 + td6)
Pulse duration, clock↑
Pulse duration, clock↓
Pulse duration, write strobe (IOW)↑
Pulse duration, read strobe (IOR)↓
Pulse duration, reset
Setup time, address (A0 – A2) valid before IOW↓
Setup time, chip select (CSx) valid before IOW↓
Setup time, data (D0 – D7) valid before IOW↑
Hold time, address (A0 – A2) valid after IOW↑
Hold time, chip select (CSx) valid after IOW↑
Hold time, data (D0 – D7) valid before IOW↑
Delay time, write cycle (IOW)↑ to IOW↓
Delay time, read cycle (IOR)↑ to IOR↓
175
ns
1
50
ns
1
50
ns
2
80
ns
3
80
ns
1000
ns
2, 3
15
ns
2, 3
15
ns
2
15
ns
2, 3
20
ns
2, 3
20
ns
2
15
ns
2
80
ns
3
80
ns
system switching characteristics over recommended ranges of supply voltage and operating
free-air temperature
td5
td6
tdis(R)
PARAMETER
Delay time, data (D0 – D7) valid before read (IOR)↑
Delay time, floating data (D0 – D7) valid after read (IOR)↑
Read to driver disable, IOR↓ to BD0↓
FIGURE
3
3
3
TEST CONDITIONS
CL = 100 pF
CL = 100 pF
CL = 100 pF
MIN MAX UNIT
60 ns
0
60 ns
60 ns
receiver switching characteristics over recommended ranges of supply voltage and operating
free-air temperature
PARAMETER
td7 Delay time, RCLK↑ to sample clock↑
FIGURE
4
TEST CONDITIONS
td8 Delay time, stop (sample clock)↑ to set interrupt (INTRPT)↑
4
td9 Delay time, read RBR/LSR (IOR)↑ to reset interrupt (INTRPT)↓
4
CL = 100 pF
MIN MAX UNIT
100 ns
1
1 ^RCLK
cycles
140 ns
transmitter switching characteristics over recommended ranges of supply voltage and operating
free-air temperature
PARAMETER
td10 Delay time, initial write THR (IOW)↑ to transmit start (SOUT)↓
FIGURE TEST CONDITIONS
5
td11 Delay time, stop (SOUT) low to interrupt (INTRPT)↑
5
td12 Delay time, write THR (IOW)↓ to reset interrupt (INTRPT) low
5
td13 Delay time, initial write (IOW)↑ to THRE interrupt (INTRPT)↑
5
td14 Delay time, read IIR (IOR)↑ to reset THRE interrupt (INTRPT) low
5
CL = 100 pF
CL = 100 pF
MIN MAX UNIT
8
24 ^baudout
cycles
8
8 ^baudout
cycles
140 ns
16
32 ^baudout
cycles
140 ns
modem control switching characteristics over recommended ranges of supply voltage and
operating free-air temperature
PARAMETER
td15 Delay time, write MCR (IOW)↑ to output (RTS, DTS)↓↑
FIGURE TEST CONDITIONS
6
CL = 100 pF
MIN MAX UNIT
100 ns
8
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265