ISL4238E Datasheet, PDF (7/17 Pages) Intersil Corporation – QFN Packaged, ±15kV ESD Protected, +2.7V to +5.5V, 10Nanoamp, 250kbps/1Mbps, RS-232 Transceivers with Enhanced Automatic Power-down

ISL4238E, ISL4244E, ISL4245E
Electrical Specifications Test Conditions: ISL4238E V_CC = 3.15V to 5.5V, C₁ to C₄ = 0.1µF; V_CC = 3V, C₁ to C₄ = 0.22µF;
ISL424xE V_CC = 3V to 5.5V, C₁ to C₄ = 0.1µF; Unless Otherwise Specified. Typicals are at T_A = +25°C
PARAMETER
TEST CONDITIONS
TEMP MIN
(°C) (Note 7)
MAX
TYP (Note 7) UNITS
ENHANCED AUTOMATIC POWER-DOWN (FORCEON = GND, FORCEOFF = V_CC)
Receiver Input Thresholds to
INVALID High
(see Figure 6)
Full
-2.7
-
2.7
V
Receiver Input Thresholds to
INVALID Low
(see Figure 6)
Full
-0.3
-
0.3
V
INVALID, Output Voltage Low
INVALID, Output Voltage High
Receiver Positive or Negative
Threshold to INVALID High Delay
(t_INVH)
Receiver Positive or Negative
Threshold to INVALID Low Delay
(t_INVL)
Receiver Positive or Negative
Threshold to INVALID Low Delay
(t_INVL)
Receiver or Transmitter Edge to
Transmitters Enabled Delay (t_WU)
Receiver or Transmitter Edge to
Transmitters Disabled Delay
(t_AUTOPWDN)
TIMING CHARACTERISTICS
I_OUT = 1.6mA
I_OUT = -1.0mA
ISL4238E
ISL4244E/ISL42445E
(Note 4)
(Note 4)
Full
-
-
Full V_CC - 0.6
-
25
-
0.5
Full
-
0.9
25
-
60
Full
100
25
-
30
Full
40
Full
-
20
Full
15
30
0.4
V
-
V
1
µs
1.5
µs
100
µs
150
µs
50
µs
60
µs
100
µs
60
sec
Maximum Data Rate
ISL4238E/4244E
R_L = 3kΩ, C_L = 1000pF, One Transmitter Switching
Full
250
500
-
kbps
Maximum Data Rate
ISL4245E
Receiver Propagation Delay
R_L = 3kΩ, One Transmitter C_L = 1000pF
Full
Switching
V_CC = 3V to 4.5V, C_L = 250pF Full
V_CC = 4.5V to 5.5V,
Full
C_L = 1000pF
Receiver Input to Receiver t_PHL
25
Output,
Full
C_L = 150pF
t_PLH
25
Full
250
1000
1000
-
-
-
-
900
2000
1500
0.15
0.2
0.3
0.35
-
kbps
-
kbps
-
kbps
0.3
µs
0.35
µs
0.5
µs
0.55
µs
Receiver Skew
t_PHL - t_PLH, C_L = 150pF
25
-
Full
-
120
250
ns
150
300
ns
Transmitter Propagation Delay
ISL4238E/44E
Transmitter Input to
Transmitter Output,
C_L = 1000pF, R_L = 3kΩ
t_PHL
t_PLH
25
-
Full
-
25
-
Full
-
0.75
1
µs
0.85
1.1
µs
0.8
1
µs
0.9
1.1
µs
Transmitter Skew ISL4238E/44E t_PHL - t_PLH (see Note 6), R_L = 3kΩ, C_L = 1000pF
25
-
Full
-
50
200
ns
100
250
ns
Transmitter Propagation Delay
ISL4245E
Transmitter Input to
Transmitter Output,
C_L = 1000pF, R_L = 3kΩ
t_PHL
t_PLH
25
-
Full
-
25
-
Full
-
0.4
0.8
µs
0.5
0.8
µs
0.35
0.7
µs
0.4
0.7
µs
Transmitter Skew ISL4245E
t_PHL - t_PLH (see Note 5), R_L = 3kΩ, C_L = 1000pF
25
-
Full
-
50
200
ns
60
250
ns
Receiver Output Enable Time
Normal Operation, R_L = 1kΩ to 0.5V_CC, C_L = 15pF
25
-
Full
-
200
350
ns
200
400
ns
7
FN8038.5
May 13, 2010