TL16C550B Datasheet, PDF (9/35 Pages) Texas Instruments – ASYNCHRONOUS COMMUNICATIONS ELEMENT

TL16C550B, TL16C550BI
ASYNCHRONOUS COMMUNICATIONS ELEMENT
SLLS136B – JANUARY 1994 – REVISED AUGUST 1996
receiver switching characteristics over recommended ranges of supply voltage and operating
free-air temperature (see Note 3)
PARAMETER
ALT. SYMBOL FIGURE TEST CONDITIONS MIN MAX UNIT
td12 Delay time, RCLK to sample
td13
Delay time, stop to set interrupt or read
RBR to LSI interrupt or stop to RXRDY↓
tSCD
tSINT
4
4,5,6,7,8
10 ns
1
RCLK
cycle
td14 Delay time, read RBR/LSR to reset interrupt low
tRINT
4,5,6,7,8
CL = 75 pF
40 ns
NOTE 3: In the FIFO mode, the read cycle (RC) = 425 ns (minimum) between reads of the receiver FIFO and the status registers (interrupt
identification register or line status register).
transmitter switching characteristics over recommended ranges of supply voltage and operating
free-air temperature
PARAMETER
td15
Delay time, initial write (INTRPT low) to transmit
start (SOUT low)
ALT. SYMBOL
tIRS
td16
Delay time, stop (SOUT low) to interrupt (INTRPT
high)
tSTI
Delay time, WR THR high to reset interrupt
td17 _{(INTRPT low)}
tHR
td18
Delay time, initial WR THR low to THRE interrupt
(INTRPT high)
tSI
td19
Delay time, RD IIR low to reset THRE interrupt
(INTRPT low)
tIR
td20
Delay time, WR THR high to TXRDY high
(inactive)
tWXI
td21
Delay time, start (SOUT low) to TXRDY low
(active)
tSXA
FIGURE
9
9
9
9
9
10,11
10,11
TEST CONDITIONS
CL = 75 pF
CL = 75 pF
CL = 75 pF
CL = 75 pF
MIN MAX UNIT
8
24
baudout
cycles
8
9
baudout
cycles
50 ns
16
32
baudout
cycles
35 ns
35 ns
8
baudout
cycles
modem control switching characteristics over recommended ranges of supply voltage and
operating free-air temperature, C_L = 75 pF
PARAMETER
ALT. SYMBOL FIGURE
MIN MAX UNIT
td22 Delay time, WR MCR low to output (RTS, DTR, OUT1, OUT2) low or high
tMDO
12
td23
Delay time, modem interrupt (CTS, DSR, DCD) low to set interrupt
(INTRPT) high
tSIM
12
50 ns
35 ns
td24 Delay time, RD MSR low to reset interrupt (INTRPT) low
tRIM
12
40 ns
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
9