TL16C552

DUAL ASYCHRONOUS COMMUNICATIONS ELEMENT

WITH FIFO

SLLS102B − DECEMBER 1990 − REVISED MARCH 1996

8

POST OFFICE BOX 655303

POST OFFICE BOX 1443

receiver switching characteristics over recommended ranges of operating free-air temperature

and supply voltage (see Figures 9, 10, 11, 12 and 13)

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

td9

Delay time from stop to INT high

See Note 7

1

RCLK

cycle

tpd5

Propagation delay time from RCLK high to sample CLK high

100

ns

tpd6

Propagation delay time from IOR (RD RBR/RD LSR) high to reset interrupt low

CL = 100 pF

150

ns

tpd7

Propagation delay time from IOR (RD RBR) low to RXRDY high

150

ns

NOTE 7: The receiver data available indication, the overrun error indication, the trigger level interrupts and the active RXRDY indication is delayed

three RCLK cycles in the FIFO mode (FCR0 = 1). After the first byte has been received, status indicators (PE, FE, BI) is delayed three

RCLK cycles. These indicators are updated immediately for any further bytes received after RD RBR 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 (see Figure 14)

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

tpd8

Propagation delay time from IOW (WR MCR) high to RTS (DTR) low/high

CL = 100 pF

100

ns

tpd9

Propagation delay time from modem input (CTS, DSR) low/high to interrupt high

CL = 100 pF

170

ns

tpd10

Propagation delay time from IOR (RD MSR) high to interrupt low

CL = 100 pF

140

ns

tpd11

Propagation delay time from RI high to interrupt high

CL = 100 pF

170

ns

parallel port timing requirements over recommended ranges of supply voltage and operating

free-air temperature (see Figure 15)

MIN

MAX

UNIT

tsu7

Setup time, data valid before STB low

1

µs

th6

Hold time, data valid after STB high

1

µs

tw6

Pulse duration, STB low

1

500

µs

td10

Delay time, BUSY high to ACK low

Defined by printer

td11

Delay time, BUSY low to ACK low

Defined by printer

tw6

Pulse duration, ACK low

Defined by printer

tw7

Pulse duration, BUSY high

Defined by printer

td12

Delay time, BUSY high after STB high

Defined by printer