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ISL4260EIRZ データシート(PDF) 5 Page - Intersil Corporation

部品番号 ISL4260EIRZ
部品情報  QFN Packaged, 짹15kV ESD Protected, 3V to 5.5V, 150nA, 250kbps, RS-232 Transmitters/Receivers with Separate Logic Supply
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メーカー  INTERSIL [Intersil Corporation]
ホームページ  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL4260EIRZ データシート(HTML) 5 Page - Intersil Corporation

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5
Detailed Description
The ISL4260E operates from a single +3V to +5.5V supply,
guarantees a 250kbps minimum data rate, requires only four
small external 0.1
μF capacitors, features low power
consumption, and meets all ElA RS-232C and V.28
specifications. The circuit is divided into three sections: The
charge pump, the transmitters, and the receivers.
Charge-Pump
Intersil’s new ISL4260E utilizes regulated on-chip dual
charge pumps as voltage doublers, and voltage inverters to
generate
±5.5V transmitter supplies from a VCC supply as
low as 3.0V. This allows these devices to maintain RS-232
compliant output levels over the
±10% tolerance range of
3.3V powered systems. The efficient on-chip power supplies
require only four small, external 0.1
μF capacitors for the
voltage doubler and inverter functions over the full VCC
range; other capacitor combinations can be used as shown
in Table 3. The charge pumps operate discontinuously (i.e.,
they turn off as soon as the V+ and V- supplies are pumped
up to the nominal values), resulting in significant power
savings.
Transmitters
The transmitters are proprietary, low dropout, inverting
drivers that translate TTL/CMOS inputs to EIA/TIA-232
output levels. Coupled with the on-chip
±5.5V supplies,
these transmitters deliver true RS-232 levels over a wide
range of single supply system voltages.
All transmitter outputs disable and assume a high
impedance state when the device enters the powerdown
mode (see Table 2). These outputs may be driven to
±12V
when disabled.
All devices guarantee a 250kbps data rate for full load
conditions (3k
Ω and 1000pF), VCC ≥ 3.0V, with one
Input Resistance
25
3
5
7
k
Ω
TRANSMITTER OUTPUTS
Output Voltage Swing
All Transmitter Outputs Loaded with 3k
Ω to Ground
Full
±5.0
±5.4
-
V
Output Resistance
VCC = V+ = V- = 0V, Transmitter Output = ±2V
Full
300
10M
-
Ω
Output Short-Circuit Current
Shorted to GND
Full
-
-
±60
mA
Output Leakage Current
VOUT = ±12V, VCC = 0V or 3V to 5.5V, SHDN =GND
Full
-
-
±25
μA
TIMING CHARACTERISTICS
Maximum Data Rate
RL =3kΩ, CL = 1000pF, One Transmitter Switching
Full
250
500
-
kbps
Receiver Propagation Delay
Receiver Input to Receiver
Output, CL = 150pF
tPHL
25
-
0.15
-
μs
tPLH
25
-
0.15
-
μs
Receiver Output Enable Time
25
-
200
-
ns
Receiver Output Disable Time
25
-
200
-
ns
Transmitter Output Enable Time
From SHDN Rising Edge to TOUT = ±3.7V
25
-
100
-
μs
Transmitter Skew
tPHL - tPLH (Note 3)
25
-
100
-
ns
Receiver Skew
tPHL - tPLH
25
-
50
-
ns
Transition Region Slew Rate
RL =3kΩ to 7kΩ,
Measured From 3V to -3V or
-3V to 3V, VCC = 3.3V
CL = 150pF to 1000pF
25
6
18
30
V/
μs
CL = 150pF to 2500pF
25
4
13
30
V/
μs
ESD PERFORMANCE
RS-232 Pins (TOUT, RIN)
Human Body Model
25
-
±15
-
kV
IEC61000-4-2 Air Gap Discharge
25
-
±15
-
kV
IEC61000-4-2 Contact Discharge
25
-
±8-
kV
NOTE:
3. Transmitter skew is measured at the transmitter zero crossing points.
4. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization
and are not production tested.
Electrical Specifications Test Conditions: VCC = 3V to 5.5V, C1 - C4 = 0.1μF, VL = VCC; Unless Otherwise Specified.
Typicals are at TA = 25oC, VCC = VL = 3.3V (Continued)
PARAMETER
TEST CONDITIONS
TEMP
(oC)
MIN
(Note 4)
TYP
MAX
(Note 4)
UNITS
ISL4260E


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