TL16C450_09 Datasheet, PDF (7/27 Pages) Texas Instruments – ASYNCHRONOUS COMMUNICATIONS ELEMENT

TL16C450
ASYNCHRONOUS COMMUNICATIONS ELEMENT
SLLS037C − MARCH 1988 − REVISED JANUARY 2006
system switching characteristics over recommended ranges of supply voltage and operating
free-air temperature
PARAMETER
tw1
Pulse duration, clock high
tw2
Pulse duration, clock low
td3
Delay time, select to CS output
td10
Delay time, RD1↓ or RD2↑ to data valid
td11
Delay time, RD1↑ or RD2↓ to floating data
tdis(R) Disable time, RD1↓↑ or RD2↑↓ to DDIS↑↓
† _{Only applies when ADS is low.}
FIGURE
1
1
2, 3†
3
3
3
TEST CONDITIONS
f = 9 MHz maximum
f = 9 MHz maximum
CL = 100 pF
CL = 100 pF
CL = 100 pF
CL = 100 pF
MIN MAX UNIT
50
ns
50
ns
70 ns
60 ns
0
60 ns
60 ns
baud generator switching characteristics over recommended ranges of supply voltage and
operating free-air temperature
PARAMETER
tw3
Pulse duration, BAUDOUT low
tw4
Pulse duration, BAUDOUT high
td1
Delay time, XIN↑ to BAUDOUT↑
td2
Delay time, XIN↑↓ to BAUDOUT↓
FIGURE
1
1
1
1
TEST CONDITIONS
f = 6.25 MHz, CLK ÷ 1,
CL = 100 pF
f = 6.25 MHz,
CL = 100 pF
CL = 100 pF
CL = 100 pF
CLK ÷ 1,
MIN MAX UNIT
80
ns
80
ns
125 ns
125 ns
receiver switching characteristics over recommended ranges of supply voltage and operating
free-air temperature
PARAMETER
td12
Delay time, RCLK to sample clock
Delay time, stop to set RCV error interrupt or read
td13
RDR to LSI interrupt or stop to
RXRDY↓
td14
Delay time, read RBR/LSR to reset interrupt
FIGURE
4
4
4
TEST CONDITIONS
CL = 100 pF
MIN MAX UNIT
100 ns
RCLK
1
1 _cycles
140 ns
transmitter switching characteristics over recommended ranges of supply voltage and operating
free-air temperature
PARAMETER
td15
Delay time, INTRPT to transmit start
FIGURE
5
TEST CONDITIONS
MIN MAX UNIT
baudout
8
24 _cycles
td16
Delay time, start to interrupt
td17
Delay time, WR THR to reset interrupt
td18
Delay time, initial write to interrupt (THRE)
td19
Delay time, read IIR to reset interrupt (THRE)
baudout
5
8
8 _cycles
5
CL = 100 pF
140 ns
baudout
5
16
32 _cycles
5
CL = 100 pF
140 ns
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
7