beautypg.com

Timing characteristics – Rainbow Electronics MAX13223E User Manual

Page 4

background image

MAX13223E

±70V Fault-Protected, 3.0V to 5.5V,
2Tx/2Rx RS-232 Transceiver

4

_______________________________________________________________________________________

Note 2: All devices are 100% production tested at T

A

= +85°C. Specifications are over -40°C to +85°C and are guaranteed by design.

Note 3: Both receivers will operate over the ±70V input range. The input resistance increases with input voltage. The input resistance

will increase within 24V

≤ |VR_IN| ≤ 32V.

Note 4: Guaranteed by design, not production tested.
Note 5: Transmitter skew is measured at the transmitter zero crosspoints.
Note 6: Output recovery time is the delayed time for the transmitter to enter normal operating mode after an overvoltage condition.

TIMING CHARACTERISTICS

(V

CC

= +3.0V to +5.5V, T

A

= -40°C to +85°C, unless otherwise noted. Typical values are at V

CC

= +3.3V, T

A

= +25°C, unless otherwise

noted. For V

CC

= +3.0V to +3.6V, C1–C3 = 0.1µF, C4 = 1µF. For V

CC

= +4.5V to +5.5V, C1 = 47nF, C2–C3 = 330nF, C4 = 1µF.) (Note 2)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Maximum Data Rate

DR

R

L

= 3k

Ω, C

L

= 1000pF, one transmitter

switching, Figure 1

250

kbps

Receiver Positive or Negative
Threshold to INVALID High

t

INVH

V

CC

= 5V, Figure 6b

1

µs

Receiver Positive or Negative
Threshold to INVALID Low

t

INVL

V

CC

= 5V, Figure 6b

30

µs

Receiver Edge to Transmitters
Enabled

t

WU

V

CC

= 5V, Figure 6b

135

µs

Receiver-Output Enable Time

t

RX,EN

Normal operation

200

ns

Receiver-Output Disable Time

t

RX,DIS

Normal operation

200

ns

Receiver Skew

|t

PRHL

- t

PRLH

|

50

ns

Transmitter Skew

|t

PTHL

- t

PTLH

|

(Note 5)

200

ns

t

PRHL

0.3

Receiver Propagation Delay

t

PRLH

C

L

= 150pF, Figure 4

0.3

µs

t

PTHL

0.8

Transmitter Propagation Delay

t

PTLH

C

L

= 1nF, R

L

= 3k

Ω, Figure 3

0.6

µs

Transmitter Fall Time or Rise
Time

t

R

, t

F

Figure 3

0.3

µs

Transmitter Time to Exit
Shutdown

t

SHDN

Figure 7

100

µs

Output Recovery Time

t

TX,REC

C

L

= 1nF, R

L

= 5k

Ω (Note 6)

100

µs

Transition-Region Slew Rate

SR

OUT

V

CC

= 3.3V, R

L

= 3k

Ω to 7kΩ, T

A

= +25°C,

measured from +3V to -3V or -3V to +3V, one
transmitter switching, C

L

= 1nF

6

30

V/µs