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ISL83386E の電気的特性と機能

ISL83386EのメーカーはIntersil Corporationです、この部品の機能は「15kV ESD Protected/ +3V to +5.5V/ 1 Microamp/ 250kbps/ RS-232 Transmitters/Receivers with Separate Logic Supply」です。


製品の詳細 ( Datasheet PDF )

部品番号 ISL83386E
部品説明 15kV ESD Protected/ +3V to +5.5V/ 1 Microamp/ 250kbps/ RS-232 Transmitters/Receivers with Separate Logic Supply
メーカ Intersil Corporation
ロゴ Intersil Corporation ロゴ 




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ISL83386E Datasheet, ISL83386E PDF,ピン配置, 機能
®
Data Sheet
January 2003
ISL83386E
FN6034
±15kV ESD Protected, +3V to +5.5V,
1 Microamp, 250kbps, RS-232
Transmitters/Receivers with Separate
Logic Supply
The ISL83386E contains 3.0V to 5.5V powered RS-232
transmitters/receivers which meet ElA/TIA-232 and
V.28/V.24 specifications, even at VCC = 3.0V. Targeted
applications are PDAs, Palmtops, and cell phones where the
low operational, and even lower standby, power consumption
is critical. Efficient on-chip charge pumps, coupled with a
manual powerdown function reduces the standby supply
current to a 1µA trickle. Small footprint packaging, and the
use of small, low value capacitors ensure board space
savings as well. Data rates greater than 250kbps are
guaranteed at worst case load conditions.
The ISL83386E features a VL pin that adjusts the logic pin
(see Pin Descriptions table) output levels and input
thresholds to values compatible with the VCC powering the
external logic (e.g., a UART).
The single pin powerdown function (SHDN = 0) disables all
the receiver and transmitter outputs, while shutting down the
charge pump to minimize supply current drain.
Table 1 summarizes the features of the ISL83386E, while
Application Note AN9863 summarizes the features of each
device comprising the 3V RS-232 family.
Ordering Information
PART
NUMBER
(BRAND)
TEMP.
RANGE (oC)
ISL83386EIV
(83386EIV)
-40 to 85
ISL83386EIV-T
(83386EIV)
-40 to 85
PACKAGE
20 Ld TSSOP
Tape and Reel
PKG. NO.
M20.173
M20.173
Features
• VL Pin for Compatibility with Mixed Voltage Systems
• ESD Protection for RS-232 I/O Pins to ±15kV (IEC61000)
• Low Power, Pin Compatible Upgrade for MAX3386E and
SP3203E
• Single SHDN Pin Disables Transmitters and Receivers
• Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V
• On-Chip Charge Pumps Require Only Four External
0.1µF Capacitors
• Receiver Hysteresis For Improved Noise Immunity
• Very Low Supply Current . . . . . . . . . . . . . . . . . . . . 300µA
• Guaranteed Minimum Data Rate . . . . . . . . . . . . . 250kbps
• Wide Power Supply Range. . . . . . . . Single +3V to +5.5V
• Low Supply Current in Powerdown State . . . . . . . . . < 1µA
Applications
• Any System Requiring RS-232 Communication Ports
- Battery Powered, Hand-Held, and Portable Equipment
- Laptop Computers, Notebooks, Palmtops
- Digital Cameras
- PDA’s and PDA Cradles
- Cellular/Mobile Phones
PART
NUMBER
ISL83386E
TABLE 1. SUMMARY OF FEATURES
NO. OF NO. OF DATA RATE Rx. ENABLE
Tx. Rx.
(kbps) FUNCTION?
VL LOGIC
SUPPLY PIN?
MANUAL
AUTOMATIC
POWER- DOWN? POWERDOWN FUNCTION?
32
250
NO
YES
YES
NO
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2003. All Rights Reserved

1 Page





ISL83386E pdf, ピン配列
Typical Operating Circuit
ISL83386E
+3.3V to +5V +
0.1µF
C1
0.1µF
C2
0.1µF
1
+
3
4
+
5
C1+
C1-
C2+
C2-
T1IN
7
TTL/CMOS
LOGIC LEVELS
T2IN
8
T3IN
9
19
VCC
T1
T2
T3
2
V+
+ C3
0.1µF
V- 6
17
C4
+ 0.1µF
T1OUT
16
T2OUT
15
T3OUT
RS-232
LEVELS
11
R1OUT
10
R2OUT
LOGIC VCC
0.1µF
12 VL
+
R1
14
R1IN
5k
R2
13
R2IN
5k
GND
18
20
SHDN
VCC
3


3Pages


ISL83386E 電子部品, 半導体
ISL83386E
(there are no pull-up resistors), and may cause ICC
increases. Connect unused inputs to GND for the best
performance.
TABLE 2. POWERDOWN TRUTH TABLE
SHDN TRANSMITTER RECEIVER
INPUT OUTPUTS OUTPUTS MODE OF OPERATION
L
High-Z
High-Z Manual Powerdown
H Active Active Normal Operation
PWR
MGT
LOGIC
SHDN
I/O CHIP
POWER SUPPLY
VL ISL83386E
VCC
Receivers
The ISL83386E contains standard inverting receivers that
convert RS-232 signals to CMOS output levels and accept
inputs up to ±25V while presenting the required 3kto 7k
input impedance (see Figure 1) even if the power is off
(VCC = 0V). The receivers’ Schmitt trigger input stage uses
hysteresis to increase noise immunity and decrease errors
due to slow input signal transitions. Receiver outputs swing
from GND to VL, and tristate in powerdown.
VL
RXIN
-25V VRIN +25V
GND
5k
RXOUT
GND VROUT VL
FIGURE 1. RECEIVER CONNECTIONS
Low Power Operation
This 3V device requires a nominal supply current of 0.3mA,
even at VCC = 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 ISL83386E in new designs.
Powerdown Functionality
The already low current requirement drops significantly
when the device enters powerdown mode. In powerdown,
supply current drops to 1µA, because the on-chip charge
pump turns off (V+ collapses to VCC, V- collapses to GND),
and the transmitter and receiver outputs tristate. This micro-
power mode makes these devices ideal for battery powered
and portable applications.
Software Controlled (Manual) Powerdown
The ISL83386E may be forced into its low power, standby
state via a simple shutdown (SHDN) pin (see Figure 2).
Driving this pin high enables normal operation, while driving
it low forces the IC into its powerdown state. The time
required to exit powerdown, and resume transmission is less
than 100µs. Connect SHDN to VCC if the powerdown
function isn’t needed.
CPU
I/O
UART
FIGURE 2. CONNECTIONS FOR MANUAL POWERDOWN
VL Logic Supply Input
Unlike other RS-232 interface devices where the CMOS
outputs swing between 0 and VCC, the ISL83386E features
a separate logic supply input (VL; 1.8V to 5V, regardless of
VCC) that sets VOH for the receiver outputs. Connecting VL
to a host logic supply lower than VCC, prevents the
ISL83386E outputs from forward biasing the input diodes of
a logic device powered by that lower supply. Connecting VL
to a logic supply greater than VCC ensures that the receiver
output levels are compatible even with the CMOS input VIH
of AC, HC, and CD4000 devices. Note that the VL supply
current increases to 100µA with VL = 5V and VCC = 3.3V
(see Figure 11). VL also powers the transmitter and logic
inputs, thereby setting their switching thresholds to levels
compatible with the logic supply. This separate logic supply
pin allows a great deal of flexibility in interfacing to systems
with different logic supplies. If logic translation isn’t required,
connect VL to the ISL83386E VCC.
Capacitor Selection
The ISL83386E charge pumps only require 0.1µF capacitors
for the full operational voltage range. Table 3 lists other
acceptable capacitor values for various supply voltage
ranges. Do not use values smaller than those listed in Table
3. Increasing the capacitor values (by a factor of 2) reduces
ripple on the transmitter outputs and slightly reduces power
consumption.
TABLE 3. REQUIRED CAPACITOR VALUES
VCC
(V)
C1 C2, C3, C4
(µF) (µF)
3.0 to 3.6
4.5 to 5.5
3.0 to 5.5
0.1
0.047
0.22
0.1
0.33
1
6

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部品番号部品説明メーカ
ISL83386E

15kV ESD Protected/ +3V to +5.5V/ 1 Microamp/ 250kbps/ RS-232 Transmitters/Receivers with Separate Logic Supply

Intersil Corporation
Intersil Corporation


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