XR19L220_07 Datasheet, PDF (34/43 Pages) Exar Corporation – SINGLE CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER

XR19L220
SINGLE CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER
REV. 1.0.1
AC ELECTRICAL CHARACTERISTICS
Unless otherwise noted: TA=0^o to 70^oC (-40^o to +85^oC for industrial grade package), Vcc=3.0 - 5.5V, 50 pF
load where applicable
SYMBOL
PARAMETER
LIMITS
3.3
MIN
MAX
LIMITS
5.0
MIN
MAX
UNIT
T_RRI
T_SI
T_INT
T_WRI
T_RST
N
Delay From IOR# To Reset Interrupt
Delay From Stop To Interrupt
Delay From Initial INT Reset To Transmit Start
Delay From IOW# To Reset Interrupt
Reset Pulse Width
Baud Rate Divisor
75
50 ns
75
50 ns
8
24
8
24 Bclk
75
50 ns
40
40
ns
1
2¹⁶-1
1
2¹⁶-1 ^-
Bclk Baud Clock
16X of data rate
Hz
FIGURE 12. CLOCK TIMING
EXTERNAL
CLOCK
CLK
CLK
OSC
34