ICL3310 Datasheet, PDF (4/9 Pages) Intersil Corporation – +3V to +5.5V, 1 Microamp, 250kbps, RS-232 Transmitter/Receiver

ICL3310
Electrical Specifications
PARAMETER
TTyepsitcCalosnadriteioantsT: _A^VC=^C25=^o3CV
to 5.5V, C₁ - C₄
(Continued)
=
0.1µF;
Unless
Otherwise
Specified.
TEST CONDITIONS
TEMP
(^oC)
MIN
TYP
TIMING CHARACTERISTICS
Maximum Data Rate
Transmitter Propagation Delay
Receiver Propagation Delay
Transmitter Output Enable Time
Transmitter Output Disable Time
Transmitter Skew
Receiver Skew
Transition Region Slew Rate
ESD PERFORMANCE
R_L = 3kΩ, C_L = 1000pF, One Transmitter Switching
Transmitter Input to
Transmitter Output,
C_L = 1000pF
t_PHL
t_PLH
Receiver Input to Receiver t_PHL
Output, C_L = 150pF
t_PLH
From SHDN Rising Edge to T_OUT = ±3V
From SHDN Falling Edge to T_OUT = ±5V
t_PHL - t_PLH (Note 2)
t_PHL - t_PLH
R_L = 3kΩ to 7kΩ,
Measured From 3V to -3V
or -3V to 3V
V_CC = 3.3V,
C_L = 150pF to 2500pF
V_CC = 4.5V,
C_L = 150pF to 2500pF
Full
250
500
Full
-
0.6
Full
-
0.7
Full
-
0.2
Full
-
0.3
25
-
50
25
-
600
25
-
100
25
-
100
25
4
-
25
6
-
RS-232 Pins (T_OUT, R_IN)
Human Body Model
IEC1000-4-2 Contact Discharge
25
-
±15
25
-
±8
IEC1000-4-2 Air Gap Discharge
25
-
>±8
All Other Pins
Human Body Model
25
-
±3
NOTE:
2. Transmitter skew is measured at the transmitter zero crossing points.
MAX UNITS
-
kbps
3.5
µs
3.5
µs
1
µs
1
µs
-
µs
-
ns
-
ns
-
ns
-
V/µs
-
V/µs
-
kV
-
kV
-
kV
-
kV
Detailed Description
ICL3310 interface ICs operate from a single +3V to +5.5V
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 ICL3310 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.
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 (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 900kbps.
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