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ICL3217ECAZ

P1-P3P4-P6P7-P9P10-P12P13-P13
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 3)
JA
(‘/W)
24 Ld SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . 75
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
ICL32X7ECX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
ICL32X7EIX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -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:
3.
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 (ICL3217E 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
(ICL3217E 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 (ICL3217E Only)
Receiver Input Thresholds to
Enable Transmitters
ICL3217E Powers Up (Figure 4) Full -2.7 - 2.7 V
Receiver Input Thresholds to
Disable Transmitters
ICL3217E 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
ICL3207E, ICL3217E
5
Detailed Description
The ICL32X7E 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: charge pump, transmitters and receivers.
Charge-Pump
Intersil’s new ICL32XXE 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 3V. 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.
ICL3217E 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
(ICL3217E 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
) IEC61000-4-2, Air-Gap Discharge Method 25 - 15 - kV
IEC61000-4-2, Contact Discharge Method 25 - 8-kV
Human Body Model 25 - 15 - 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
ICL3207E, ICL3217E
6
Receivers
The ICL32X7E 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 ICL3207E are always active. The
ICL3217E 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 ICL3207E.
Low Power, Pin Compatible Replacement
Pin compatibility with existing 5V products (e.g., MAX207E),
coupled with the wide operating supply range, make the
ICL32X7E potential lower power, higher performance drop-in
replacements for existing ‘2X7E 5V applications. As long as
the 5V RS-232 output swings are acceptable, the
ICL32X7E devices should work in most 5V applications.
When replacing a ‘207E or ‘237E 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 (ICL3217E Only)
Even greater power savings is available by using the
ICL3217E which features an automatic powerdown function.
When no valid RS-232 voltages (see Figure 4) are sensed
on any receiver input for 30s, the ICL3217E 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 ICL3217E 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 ICL3217E 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. ICL3217E 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
ICL3217E
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
ICL3207E, ICL3217E
P1-P3P4-P6P7-P9P10-P12P13-P13

ICL3217ECAZ

Mfr. #:
Buy ICL3217ECAZ
Manufacturer:
Renesas / Intersil
Description:
RS-232 Interface IC RS232 3V 5D/3R 15KV W/SHTDWN 24SSOP
Lifecycle:
New from this manufacturer.
Delivery:
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