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TL16C554 数据表(PDF) 8 Page - Texas Instruments

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部件名 TL16C554
功能描述  ASYNCHRONOUS COMMUNICATIONS ELEMENT
Download  33 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

TL16C554 数据表(HTML) 8 Page - Texas Instruments

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TL16C554, TL16C554I
ASYNCHRONOUS COMMUNICATIONS ELEMENT
SLLS165D – JANUARY 1994 – REVISED JULY 1998
8
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
transmitter switching characteristics over recommended ranges of operating free-air temperature
and supply voltage (see Figures 6, 7, and 8)
PARAMETER
TEST CONDITIONS
MIN
MAX
UNIT
td5
Delay time, INTx
↓ to TXx↓ at start
8
24
RCLK
cycles
td6
Delay time, TXx
↓ at start to INTx↑
See Note 5
8
8
RCLK
cycles
td7
Delay time, IOW high or low (WR THR) to INTx
See Note 5
16
32
RCLK
cycles
td8
Delay time, TXx
↓ at start to TXRDY↓
CL = 100 pF
8
RCLK
cycles
tpd1
Propagation delay time, IOW (WR THR)
↓ to INTx↓
CL = 100 pF
35
ns
tpd2
Propagation delay time, IOR (RD IIR)
↑ to INTx↓
CL = 100 pF
30
ns
tpd3
Propagation delay time, IOW (WR THR)
↑ to TXRDY↑
CL = 100 pF
50
ns
NOTE 5: If the transmitter interrupt delay is active, this delay is lengthened by one character time minus the last stop bit time.
receiver switching characteristics over recommended ranges of operating free-air temperature
and supply voltage (see Figures 9 through 13)
PARAMETER
TEST CONDITIONS
MIN
MAX
UNIT
td9
Delay time, stop bit to INTx
↑ or stop bit to RXRDY↓ or read RBR to set interrupt
See Note 6
1
RCLK
cycle
tpd4
Propagation delay time, Read RBR/LSR to INTx
↓/LSR interrupt↓
CL = 100 pF,
See Note 7
40
ns
tpd5
Propagation delay time, IOR RCLK
↓ to RXRDY↑
See Note 7
30
ns
NOTES:
6. The receiver data available indicator, the overrun error indicator, the trigger level interrupts, and the active RXRDY indicator are
delayed three RCLK (internal receiver timing clock) cycles in the FIFO mode (FCR0 = 1). After the first byte has been received, status
indicators (PE, FE, BI) are delayed three RCLK cycles. These indicators are updated immediately for any further bytes received after
IOR goes active for a read from the RBR register. There are eight RCLK cycle delays for trigger change level interrupts.
7. RCLK is an internal signal derived from divisor latch LSB (DLL) and divisor latch MSB (DLM) divisor latches.
modem control switching characteristics over recommended ranges of operating free-air
temperature and supply voltage, CL = 100 pF (see Figure 14)
PARAMETER
MIN
MAX
UNIT
tpd6
Propagation delay time, IOW (WR MCR)
↑ to RTSx, DTRx↑
50
ns
tpd7
Propagation delay time, modem input CTSx, DSRx, and DCDx
↓↑ to INTx↑
30
ns
tpd8
Propagation delay time, IOR (RD MSR)
↑ to interrupt↓
35
ns
tpd9
Propagation delay time, RIx
↑ to INTx↑
30
ns


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