ICL3207_05 Datasheet, PDF (5/11 Pages) Intersil Corporation – Low Power, +3V to +5.5V, 250kbps, RS-232 Transmitters/Receivers

ICL3207, ICL3217
Electrical Specifications
PARAMETER
Input Hysteresis
Input Resistance
TRANSMITTER OUTPUTS
Output Voltage Swing
Output Resistance
Output Short-Circuit Current
Output Leakage Current
(ICL3217 Only)
TIMING CHARACTERISTICS
Maximum Data Rate
(One Transmitter Switching)
Receiver Propagation Delay
Transmitter Skew
Receiver Skew
Transition Region Slew Rate
ESD PERFORMANCE
RS-232 Pins (T_OUT, R_IN)
All Other Pins
Test Conditions: V_CC = 3V to 5.5V, C₁ - C₄ = 0.1µF; Unless Otherwise Specified.
Typicals are at T_A = 25°C (Continued)
TEST CONDITIONS
TEMP
(°C)
MIN
TYP
25
-
0.3
25
3
5
All Transmitter Outputs Loaded with 3kΩ to Ground
V_CC = V+ = V- = 0V, Transmitter Output = ±2V
V_OUT = ±12V, V_CC = 0V or 3V to 5.5V
In Automatic Powerdown
Full
±5.0
±5.4
Full
300
10M
Full
-
±35
Full
-
-
V_CC = 3.15V, C₁ - C₄ = 0.1µF, R_L = 3kΩ, C_L = 1000pF
Full
250
500
V_CC = 3.0V, C₁ - C₄ = 0.22µF, R_L = 3kΩ, C_L = 1000pF
Full
250
286
V_CC ≥ 4.5V, C₁ - C₄ = 0.1µF, R_L = 3kΩ, C_L = 1000pF
Full
250
310
Receiver Input to Receiver
Output, C_L = 150pF
t_PHL
t_PLH
25
-
0.3
25
-
0.3
t_PHL - t_PLH
Full
-
200
t_PHL - t_PLH
Full
-
100
V_CC = 3.3V, R_L = 3kΩ to 7kΩ, C_L = 200pF to 2500pF 25
4
15
Measured From +3V to -3V or -3V
to +3V
C_L = 200pF to 1000pF
25
6
15
Human Body Model
IEC61000-4-2 Contact Discharge
IEC61000-4-2 Air Gap Discharge
Human Body Model
25
-
±15
25
-
±8
25
-
±6
25
-
±2
MAX
-
7
UNITS
V
kΩ
-
V
-
Ω
±60
mA
±25
µA
-
-
-
-
-
1000
500
30
30
kbps
kbps
kbps
µs
µs
ns
ns
V/µs
V/µs
-
kV
-
kV
-
kV
-
kV
Detailed Description
The ICL32X7 interface ICs operate from a single +3V to
+5.5V power supply, guarantee a 250kbps minimum data
rate, require only four small external 0.1µF capacitors,
feature low power consumption, and meet 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 ICL32XX family utilizes regulated on-chip dual
charge pumps as voltage doublers, and voltage inverters to
generate ±5.5V transmitter supplies from a V_CC 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 0.1µF capacitors for the
voltage doubler and inverter functions at V_CC = 3.3V. See
the “Capacitor Selection” section, and Table 3 for capacitor
recommendations for other operating conditions. 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.
ICL3217 transmitter outputs disable and assume a high
impedance state when the device enters the automatic
powerdown mode. These outputs may be driven to ±12V
when disabled.
Both devices guarantee a 250kbps data rate for full load
conditions (3kΩ and 1000pF), V_CC ≥ 3.0V, with one
transmitter operating at full speed. Under more typical
conditions of V_CC ≥ 3.3V, R_L = 3kΩ, and C_L = 250pF, one
transmitter easily operates at 800kbps.
Transmitter inputs float if left unconnected, and may cause
I_CC increases. Connect unused inputs to GND for the best
performance.
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