TL16C552AFNR Datasheet, PDF (9/38 Pages) Texas Instruments – DUAL ASYNCHRONOUS COMMUNICATIONS ELEMENT

TL16C552A, TL16C552AM
DUAL ASYNCHRONOUS COMMUNICATIONS ELEMENT
WITH FIFO
SLLS189D – NOVEMBER 1994 – REVISED JANUARY 1999
transmitter switching characteristics over recommended ranges of operating free-air temperature
and supply voltage (see Note 11 and Figures 6, 7, and 8)
PARAMETER
td5 Delay time, interrupt THRE ↓ to SOUT ↓ at start
td6 Delay time, SOUT ↓ at start to interrupt THRE ↑
td7 Delay time, IOW (WR THR) ↑ to interrupt THRE ↑
td8 Delay time, SOUT ↓ at start to TXRDY ↓
tpd2 Propagation delay time from IOW (WR THR) ↓ to interrupt THRE ↓
TEST CONDITIONS
See Figure 6
See Note 12 and Figure 6
See Note 12 and Figure 6
CL = 100 pF,
See Figures 7 and 8
CL = 100 pF,
See Figure 6
MIN MAX UNIT
8
24
RCLK
cycles
8
9
RCLK
cycles
16
32
RCLK
cycles
8
RCLK
cycles
140 ns
tpd4 Propagation delay time from IOR (RD IIR) ↑ to interrupt THRE ↓
CL = 100 pF,
See Figure 6
140 ns
tpd5 Propagation delay time from IOW (WR THR) ↑ to TXRDY ↑
CL = 100 pF,
See Figures 7 and 8
195 ns
NOTES: 11. These parameters are not production tested.
12. When 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 Note 13 and Figures 9 through 13)
PARAMETER
TEST CONDITIONS MIN MAX UNIT
td9 Delay time from stop to INT ↑
See Note 14
1
RCLK
cycle
tpd6 Propagation delay time from RCLK ↑ to sample CLK ↑
100 ns
tpd7 Propagation delay time from IOR (RD RBR/RD LSR) ↓ to reset interrupt ↓
CL = 100 pF
150 ns
tpd8 Propagation delay time from IOR (RD RBR) ↓ to RXRDY ↑
150 ns
NOTES: 13. These parameters are not production tested.
14. The receiver data available indicator, the overrun error indicator, the trigger level interrupts, and the active RXRDY indicator are
delayed three RCLK cycles in 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 RDRBR goes active.
There are eight RCLK cycle delays for trigger change level interrupts.
modem control switching characteristics over recommended ranges of operating free-air
temperature and supply voltage, C_L = 100 pF (see Note 15 and Figure 14)
PARAMETER
tpd9
tpd10
tpd11
tpd12
Propagation delay time from IOW (WR MCR) ↑ to RTS (DTR) ↓↑
Propagation delay time from modem input (CTS, DSR) ↓↑ to interrupt ↑
Propagation delay time from IOR (RD MSR) ↑ to interrupt ↓
Propagation delay time from RI ↑ to interrupt ↑
NOTE 15: These parameters are not production tested.
MIN MAX UNIT
100 ns
170 ns
140 ns
170 ns
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