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ICL3217CAZ

P1-P3P4-P6P7-P9P10-P12
4
Absolute Maximum Ratings Thermal Information
V
CC
to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6V
V+ to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7V
V- to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +0.3V to -7V
V+ to V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14V
Input Voltages
T
IN
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6V
R
IN
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25V
Output Voltages
T
OUT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.2V
R
OUT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to V
CC
+ 0.3V
Short Circuit Duration
T
OUT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . See Specification Table
Thermal Resistance (Typical, Note 1)
JA
(°C/W)
24 Ld SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . 74
24 Ld SSOP Package . . . . . . . . . . . . . . . . . . . . . . . 100
Maximum Junction Temperature (Plastic Package) . . . . . . . 150°C
Maximum Storage Temperature Range . . . . . . . . . . . -65°C to 150°C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300°C
(Lead Tips Only)
Operating Conditions
Temperature Range
ICL32X7CX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
ICL32X7IX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to 85°C
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
1.
JA
is measured with the component mounted on a low effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
Electrical Specifications Test Conditions: V
CC
= 3V to 5.5V, C
1
- C
4
= 0.1F; Unless Otherwise Specified.
Typicals are at T
A
= 25°C
PARAMETER TEST CONDITIONS
TEMP
(°C) MIN TYP MAX UNITS
DC CHARACTERISTICS
Supply Current, Automatic
Powerdown
All R
IN
Open (ICL3217 Only) 25 - 1.0 10 A
Supply Current,
Automatic Powerdown Disabled
All Outputs Unloaded 25 - 0.3 1.0 mA
TRANSMITTER INPUTS AND RECEIVER OUTPUTS
Input Logic Threshold Low T
IN
Full - - 0.8 V
Input Logic Threshold High T
IN
V
CC
= 3.3V Full 2.0 - - V
V
CC
= 5.0V Full 2.4 - - V
Input Leakage Current T
IN
Full - 0.01 1.0 A
Output Leakage Current
(ICL3217 Only)
Full - 0.05 10 A
Output Voltage Low I
OUT
= 1.6mA Full - - 0.4 V
Output Voltage High I
OUT
= -1.0mA Full V
CC
-0.6 V
CC
-0.1 - V
AUTOMATIC POWERDOWN (ICL3217 Only)
Receiver Input Thresholds to
Enable Transmitters
ICL3217 Powers Up (Figure 4) Full -2.7 - 2.7 V
Receiver Input Thresholds to
Disable Transmitters
ICL3217 Powers Down (Figure 4) Full -0.3 - 0.3 V
Receiver Threshold to Transmitters
Enabled Delay (t
WU
)
25 - 100 - s
Receiver Positive or Negative
Threshold to Transmitters
Disabled Delay
25 - 30 - s
RECEIVER INPUTS
Input Voltage Range Full -25 - 25 V
Input Threshold Low V
CC
= 3.3V 25 0.6 1.2 - V
V
CC
= 5.0V 25 0.8 1.5 - V
Input Threshold High V
CC
= 3.3V 25 - 1.5 2.4 V
V
CC
= 5.0V 25 - 1.8 2.4 V
ICL3207, ICL3217
5
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 0.1F 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 0.1F 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 (3k and 1000pF), V
CC
3.0V, with one
transmitter operating at full speed. Under more typical
conditions of V
CC
3.3V, R
L
=3k, 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.
Input Hysteresis 25 - 0.3 - V
Input Resistance 25357k
TRANSMITTER OUTPUTS
Output Voltage Swing All Transmitter Outputs Loaded with 3k to Ground Full 5.0 5.4 - V
Output Resistance V
CC
= V+ = V- = 0V, Transmitter Output = 2V Full 300 10M -
Output Short-Circuit Current Full - 35 60 mA
Output Leakage Current
(ICL3217 Only)
V
OUT
= 12V, V
CC
= 0V or 3V to 5.5V
In Automatic Powerdown
Full - - 25 A
TIMING CHARACTERISTICS
Maximum Data Rate
(One Transmitter Switching)
V
CC
= 3.15V, C
1
- C
4
= 0.1F, R
L
= 3kC
L
= 1000pF Full 250 500 - kbps
V
CC
= 3.0V, C
1
- C
4
= 0.22F, R
L
= 3kC
L
= 1000pF Full 250 286 - kbps
V
CC
4.5V, C
1
- C
4
= 0.1F, R
L
= 3kC
L
= 1000pF Full 250 310 - kbps
Receiver Propagation Delay Receiver Input to Receiver
Output, C
L
= 150pF
t
PHL
25 - 0.3 - s
t
PLH
25 - 0.3 - s
Transmitter Skew t
PHL
- t
PLH
Full - 200 1000 ns
Receiver Skew t
PHL
- t
PLH
Full - 100 500 ns
Transition Region Slew Rate V
CC
= 3.3V, R
L
=3kto 7k
Measured From +3V to -3V or -3V
to +3V
C
L
= 200pF to 2500pF 25 4 15 30 V/s
C
L
= 200pF to 1000pF 25 6 15 30 V/s
ESD PERFORMANCE
RS-232 Pins (T
OUT
, R
IN
) Human Body Model 25 - 15 - kV
IEC61000-4-2 Contact Discharge 25 - 8-kV
IEC61000-4-2 Air Gap Discharge 25 - 6-kV
All Other Pins Human Body Model 25 - 2-kV
Electrical Specifications Test Conditions: V
CC
= 3V to 5.5V, C
1
- C
4
= 0.1F; Unless Otherwise Specified.
Typicals are at T
A
= 25°C (Continued)
PARAMETER TEST CONDITIONS
TEMP
(°C) MIN TYP MAX UNITS
ICL3207, ICL3217
6
Receivers
The ICL32X7 each contain inverting receivers that convert
RS-232 signals to CMOS output levels and accept inputs up
to 25V while presenting the required 3k to 7k input
impedance (see Figure 1) even if the power is off
(V
CC
= 0V). The receivers’ Schmitt trigger input stage uses
hysteresis to increase noise immunity and decrease errors
due to slow input signal transitions.
Receivers on the ICL3207 are always active. The ICL3217
receivers disable when in the automatic powerdown state,
thereby eliminating the possible current path through a
shutdown peripheral’s input protection diode (see Figures 2
and 3).
Low Power Operation
These 3V devices require a nominal supply current of
0.3mA, even at V
CC
= 5.5V, during normal operation (not in
powerdown mode). This is considerably less than the 11mA
current required by comparable 5V RS-232 devices, allowing
users to reduce system power simply by replacing the old
style device with the ICL3207.
Low Power, Pin Compatible Replacement
Pin compatibility with existing 5V products (e.g., MAX207),
coupled with the wide operating supply range, make the
ICL32X7 potential lower power, higher performance drop-in
replacements for existing ‘2X7 5V applications. As long as
the 5V RS-232 output swings are acceptable, the ICL32X7
devices should work in most 5V applications.
When replacing a ‘207 or ‘237 device in an existing 5V
application, it is acceptable to terminate C
3
to V
CC
as shown
on the “Typical Operating Circuit”. Nevertheless, terminate
C
3
to GND if possible, as slightly better performance results
from this configuration.
Automatic Powerdown (ICL3217 Only)
Even greater power savings is available by using the
ICL3217 which features an automatic powerdown function.
When no valid RS-232 voltages (see Figure 4) are sensed
on any receiver input for 30s, the ICL3217 automatically
enters its powerdown state (see Figure 5). In powerdown,
supply current drops to 1A, because the on-chip charge
pump turns off (V+ collapses to V
CC
, V- collapses to GND),
and the receiver and transmitter outputs three-state (see
Table 2). This micro-power mode makes the ICL3217 ideal
for battery powered and portable applications. Invalid
receiver levels occur whenever the driving peripheral’s
outputs are shut off (powered down) or when the RS-232
interface cable is disconnected. The ICL3217 powers back
up whenever it detects a valid RS-232 voltage level on any
receiver input (such as when the RS-232 cable is
reconnected). The time to recover from automatic powerdown
mode is typically 100s.
R
XOUT
GND V
ROUT
V
CC
5k
R
XIN
-25V V
RIN
+25V
GND
V
CC
FIGURE 1. INVERTING RECEIVER CONNECTIONS
FIGURE 2. POWER DRAIN THROUGH POWERED DOWN
PERIPHERAL
OLD
V
CC
POWERED
GND
V
CC
Rx
Tx
V
CC
CURRENT
FLOW
V
OUT
=
V
CC
RS-232 CHIP
DOWN
UART
SHDN = GND
TABLE 2. ICL3217 AUTOMATIC POWERDOWN OPERATION
RS-232 SIGNAL
PRESENT AT
RECEIVER
INPUT?
TRANSMITTER
OUTPUTS
RECEIVER
OUTPUTS
MODE
OF
OPERATION
YES Active Active Normal
Operation
NO High-Z High-Z Powerdown
Due to Auto
Powerdown
Logic
FIGURE 3. DISABLED RECEIVERS PREVENT POWER DRAIN
ICL3217
TRANSITION
DETECTOR
R
X
T
X
V
CC
V
CC
TO
V
OUT
=
HI-Z*
WAKE-UP
LOGIC
POWERED
DOWN
UART
V-
* IN AUTOMATIC
POWERDOWN
ICL3207, ICL3217
P1-P3P4-P6P7-P9P10-P12

ICL3217CAZ

Mfr. #:
Buy ICL3217CAZ
Manufacturer:
Renesas / Intersil
Description:
RS-232 Interface IC RS232 3V 5D/3R AUTODWN 24SSOP COM
Lifecycle:
New from this manufacturer.
Delivery:
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