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參數(shù)資料
| 型號： | ISL4243E |
| 廠商： | Intersil Corporation |
| 英文描述： | QFN Packaged, ±15kV ESD Protected, +2.7V to +5.5V, 10Nanoamp, 250kbps, RS-232 Transmitters/Receivers(QFN 封裝, ±15kV ESD防護, +2.7V至+5.5V, 10毫微安, 250kbps, RS-232收發(fā)器) |
| 中文描述： | QFN封裝，具有± 15kV ESD保護，2.7V至5.5V，10Nanoamp，250kbps的和RS - 232發(fā)送器/接收器封裝（QFN封裝，具有± 15kV ESD防護，為2.7V至5.5V之間，10毫微安，250kbps的，RS - 232接口收發(fā)器） |
| 文件頁數(shù)： | 7/13頁 |
| 文件大?。?/td> | 377K |
| 代理商： | ISL4243E |
7
Detailed Description
The ISL424XE operate from a single +2.7V to +5.5V supply,
guarantee a 250kbps minimum data rate, require only four
small external 0.1
μ
F capacitors, feature low power
consumption, and meet all ElA RS-232C and V.28
specifications even with V
CC
= 3.0V. The circuit is divided
into three sections: The charge pump, the transmitters, and
the receivers.
Charge-Pump
Intersil’s new ISL424XE devices utilize 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 them 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 0.1
μ
F capacitors for the
voltage doubler and inverter functions. 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.
The 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 900kbps.
Transmitter inputs float if left unconnected, and may cause
I
CC
increases. Connect unused inputs to GND for the best
performance.
Receivers
All the ISL424XE devices contain standard inverting
receivers that three-state via the EN or FORCEOFF control
lines. Additionally, the ISL424XE products include
noninverting (monitor) receivers (denoted by the R
OUTB
label) that are always active, regardless of the state of any
control lines. All the receivers 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.
The ISL4241E inverting receivers disable only when EN is
driven high. ISL4243E receivers disable during forced
(manual) powerdown, but not during automatic powerdown
(see Table 2).
ISL424XE monitor receivers remain active even during
manual powerdown, making them extremely useful for Ring
Indicator monitoring. Standard receivers driving powered
down peripherals must be disabled to prevent current flow
through the peripheral’s protection diodes (see Figures 2
and 3). This renders them useless for wake up functions, but
Transition Region Slew Rate
V
CC
= 3V to 3.6V, R
L
= 3k
to 7k
,
Measured From 3V to -3V or -3V to 3V
C
L
= 150pF to
2500pF
25
4
9
30
V/
μ
s
Full
4
8
30
V/
μ
s
C
L
= 150pF to
1000pF
25
6
11
30
V/
μ
s
Full
6
10
30
V/
μ
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
-
±
15
-
kV
All Other Pins
Human Body Model
25
-
±
2
-
kV
NOTE:
2. Transmitter skew is measured at the transmitter zero crossing points.
Electrical Specifications
Test Conditions: V
CC
= 3V to 5.5V, C
1
- C
4
= 0.1
μ
F; Unless Otherwise Specified.
Typicals are at T
A
= 25
°
C
(Continued)
PARAMETER
TEST CONDITIONS
TEMP
(°C)
MIN
TYP
MAX
UNITS
R
XOUT
GND
≤
V
ROUT
≤
V
CC
5k
R
XIN
-25V
≤
V
RIN
≤
+25V
GND
V
CC
FIGURE 1. INVERTING RECEIVER CONNECTIONS
ISL4241E, ISL4243E
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISL4241E | QFN Packaged, +/-15kV ESD Protected, +2.7V to +5.5V, 10Nanoamp, 250kbps, RS-232 Transmitters/Receivers |
| ISL4241EIR | QFN Packaged, +/-15kV ESD Protected, +2.7V to +5.5V, 10Nanoamp, 250kbps, RS-232 Transmitters/Receivers |
| ISL4241EIRZ-T | QFN Packaged, +/-15kV ESD Protected, +2.7V to +5.5V, 10Nanoamp, 250kbps, RS-232 Transmitters/Receivers |
| ISL4243EIR | QFN Packaged, +/-15kV ESD Protected, +2.7V to +5.5V, 10Nanoamp, 250kbps, RS-232 Transmitters/Receivers |
| ISL4243EIRZ | QFN Packaged, +/-15kV ESD Protected, +2.7V to +5.5V, 10Nanoamp, 250kbps, RS-232 Transmitters/Receivers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL4243EIR | 功能描述:RS-232接口集成電路 TXRX 2.7-5.5V ESD RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| ISL4243EIR-T | 功能描述:IC 3DRVR/5RCVR RS232 3V 32-QFN RoHS:否 類別:集成電路 (IC) >> 接口 - 驅(qū)動器，接收器，收發(fā)器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:25 系列:- 類型:收發(fā)器 驅(qū)動器/接收器數(shù):2/2 規(guī)程:RS232 電源電壓:4.5 V ~ 5.5 V 安裝類型:通孔 封裝/外殼:16-DIP（0.300"，7.62mm） 供應商設(shè)備封裝:16-PDIP 包裝:管件 |
| ISL4243EIRZ | 功能描述:RS-232接口集成電路 RS232 3V 3D/5R 15KV AUTODWN 32QFN IND RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| ISL4243EIRZ-T | 功能描述:RS-232接口集成電路 RS232 3V 3D/5R 15KV AUTODWN 32QFN IND RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| ISL4244E | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:QFN Packaged, ±15kV ESD Protected, +2.7V to +5.5V, 10Nanoamp, 250kbps/1Mbps, RS-232 Transceivers with Enhanced Automatic Power-down |
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