TL16C750 Datasheet, PDF (10/35 Pages) Texas Instruments – ASYNCHRONOUS COMMUNICATIONS ELEMENT WITH 64-BYTE FIFOs AND AUTOFLOW CONTROL

TL16C750
ASYNCHRONOUS COMMUNICATIONS ELEMENT
WITH 64-BYTE FIFOs AND AUTOFLOW CONTROL
SLLS191C – JANUARY 1995 – REVISED DECEMBER 1997
system timing requirements over recommended ranges of supply voltage and operating free-air
temperature
PARAMETER
tcR Cycle time, read (tw7 + td8 + td9)
tcW Cycle time, write (tw6 + td5 + td6)
tw1 Pulse duration, clock (XIN) high
tw2 Pulse duration, clock (XIN) low
tw5 Pulse duration, ADS low
tw6 Pulse duration, write strobe
tw7 Pulse duration, read strobe
tw8 Pulse duration, MR
tsu1 Setup time, address valid before ADS↑
tsu2 Setup time, CS valid before ADS↑
tsu3 Setup time, data valid before WR1↓ or WR2↑
tsu4† Setup time, CTS↑ before midpoint of stop bit
th1 Hold time, address low after ADS↑
th2 Hold time, CS valid after ADS↑
th3 Hold time, CS valid after WR1↑ or WR2↓
th4† Hold time, address valid after WR1↑ or WR2↓
th5 Hold time, data valid after WR1↑ or WR2↓
th6 Hold time, CS valid after RD1↑ or RD2↓
th7† Hold time, address valid after RD1↑ or RD2↓
td4† Delay time, CS valid before WR1↓ or WR2↑
td5 Delay time, address valid before WR1↓ or WR2↑
td6† Delay time, write cycle, WR1↑ or WR2↓ to ADS↓
td7† Delay time, CS valid to RD1↓ or RD2↑
td8† Delay time, address valid to RD1↓ or RD2↑
td9 Delay time, read cycle, RD1↑ or RD2↓ to ADS↓
td10 Delay time, RD1↓ or RD2↑ to data valid
td11 Delay time, RD1↑ or RD2↓ to floating data
† _{Only applies when ADS is low}
ALT. SYMBOL
RC
WC
tXH
tXL
tADS
tWR
tRD
tMR
tAS
tCS
tDS
tAH
tCH
tWCS
tWA
tDH
tRCS
tRA
tCSW
tAW
tWC
tCSR
tAR
tRC
tRVD
tHZ
FIGURE
4
4
5, 6
5
6
5, 6
5, 6
5
16
5, 6
5, 6
5
5
5
6
6
5
5
5
6
6
6
6
6
TEST CONDITIONS
f = 16 MHz maximum
f = 16 MHz maximum
CL = 75 pF
CL = 75 pF
MIN MAX UNIT
87
ns
87
ns
25
ns
25
ns
9
ns
40
ns
40
ns
1
µs
8
ns
8
ns
15
ns
10 ns
0
ns
0
ns
10
ns
10
ns
5
ns
10
ns
20
ns
7
ns
7
ns
40
ns
7
ns
7
ns
40
ns
45
ns
20
ns
system switching characteristics over recommended ranges of supply voltage and operating
free-air temperature (see Note 9)
PARAMETER
ALT. SYMBOL FIGURE TEST CONDITIONS
tdis(R) Disable time, RD1↓↑ or RD2↑↓ to DDIS↑↓
tRDD
6
CL = 75 pF
NOTE 9: Charge and discharge times are determined by VOL, VOH, and external loading.
MIN MAX UNIT
20
ns
baud generator switching characteristics over recommended ranges of supply voltage and
operating free-air temperature, C_L = 75 pF
PARAMETER
ALT. SYMBOL FIGURE TEST CONDITIONS MIN MAX UNIT
tw3
Pulse duration, BAUDOUT low
tw4
Pulse duration, BAUDOUT high
td1
Delay time, XIN↑ to BAUDOUT↑
td2
Delay time, XIN↑↓ to BAUDOUT↓
tLW
tHW
tBLD
tBHD
4
f = 16 MHz, CLK ÷ 2
4
f = 16 MHz, CLK ÷ 2
4
4
50
ns
50
ns
45 ns
45 ns
10
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