MAX3140 Maxim, MAX3140 Datasheet - Page 4

• Manufacturer Part Number: MAX3140
• Description: SPI/MICROWIRE-Compatible UART with Integrated True Fail-Safe RS-485/RS-422 Transceivers
• Manufacturer: Maxim

SPI/MICROWIRE-Compatible UART with Integrated
True Fail-Safe RS-485/RS-422 Transceivers
UART SWITCHING CHARACTERISTICS
(V
UART configured for 9600 baud, T
4
UART AC TIMING (Figure 1)
CS Low to DOUT Valid
CS High to DOUT Tri-State
CS to SCLK Setup Time
CS to SCLK Hold Time
SCLK Fall to DOUT Valid
DIN to SCLK Setup Time
DIN to SCLK Hold Time
SCLK Period
SCLK High Time
SCLK Low Time
SCLK Rising Edge to CS
FaIling
CS Rising Edge to SCLK
Rising
CS High Pulse Width
Output Rise Time
Output Fall Time
CC
_______________________________________________________________________________________
= +5V ±5%, f
PARAMETER
XTL
= 1.8432MHz, T
A
SYMBOL
= +25°C.) (Note 1)
t
t
t
t
t
t
CSW
t
CSH
t
t
t
t
t
CSS
t
CS0
CS1
DO
DV
DS
DH
CP
CH
TR
CL
t r
t f
A
= T
MIN
C
C
C
TX, RTS, DOUT; C
TX, RTS, DOUT, IRQ; C
LOAD
LOAD
LOAD
to T
= 100pF
= 100pF, R
= 100pF
MAX
, unless otherwise noted. Typical values are measured with V
CONDITIONS
LOAD
CS
= 10kΩ
LOAD
= 100pF
= 100pF
MIN
100
100
238
100
100
100
200
200
0
0
TYP
10
10
MAX
100
100
100
CC
UNITS
= +5V,
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns