参数资料
| 型号： | ISL4238EIRZ-T |
| 厂商： | Intersil |
| 文件页数： | 16/17页 |
| 文件大小： | 0K |
| 描述： | IC XMITTER/RCVR ESD RS232 32-QFN |
| 标准包装： | 1 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 5/3 |
| 规程： | RS232 |
| 电源电压： | 2.7 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-QFN 裸露焊盘（5x5） |
| 包装： | 标准包装 |
| 其它名称： | ISL4238EIRZ-TDKR |
8
FN8038.5
May 13, 2010
Detailed Description
These interface ICs operate from a single +2.7V to +5.5V
supply, guarantee a 250kbps (ISL4238E/ISL4244E)/1Mbps
(ISL4245E) 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 RS-232 family utilizes regulated on-chip dual
charge pumps as voltage doublers, and voltage inverters to
generate ±5.5V transmitter supplies from a VCC 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. 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.
Transmitter outputs disable and assume a high impedance
state when the device enters the power-down mode (see Table
2). These outputs may be driven to ±12V when disabled.
The ISL4238E/ISL4244E guarantee a 250kbps data rate for
full load conditions (3k
Ω and 1000pF), V
CC ≥ 3.0V, with one
transmitter operating at full speed. Under more typical
conditions of VCC ≥ 3.3V, RL = 3kΩ, and CL = 250pF, one
transmitter easily operates at 1Mbps.
The ISL4245E guarantees a 1Mbps data rate for full load
conditions (3k
Ω and 250pF), V
CC ≥ 3.0V, with one
transmitter operating at full speed. Under more typical
conditions of VCC ≥ 3.3V, RL = 3kΩ, and CL = 250pF, one
transmitter easily operates at 1.4Mbps.
Transmitter inputs on the ISL424XE float if left unconnected,
and may cause ICC increases. Connect unused inputs to
Receiver Output Disable Time
Normal Operation, RL = 1kΩ to 0.5VCC, CL = 15pF
25
-
350
500
ns
Full
-
400
600
ns
Transmitter Output Enable Time
ISL4238E/ISL4244E/ISL4245E
Normal Operation, RL = 3kΩ, CL = 1000pF
25
-
25
40
s
Full
-
35
50
s
Transmitter Output Disable Time
ISL4238E/ISL4244E/ISL4245E
Normal Operation, RL = 3kΩ, CL = 1000pF
25
-
2.5
4
s
Full
-
2.7
4
s
Transition Region Slew Rate
ISL4238E/ISL4244E
VCC = 3V to 3.6V,
RL =3kΩ to 7kΩ,
Measured From 3V to -3V
or -3V to 3V
CL = 150pF to 1000pF
25
6
11
30
V/s
Full
6
10
30
V/s
CL = 150pF to 2500pF
25
4
9
30
V/s
Full
4
8
30
V/s
Transition Region Slew Rate
ISL4245E
VCC = 3V to 3.6V, RL = 3kΩ to 7kΩ, Measured From 3V to
-3V or -3V to 3V, CL = 150pF to 1000pF
25
24
40
150
V/s
Full
24
35
150
V/s
ESD PERFORMANCE
RS-232 Pins (TOUT, RIN)
Human Body Model
25
-
±15
-
kV
IEC61000-4-2 Air Gap Discharge
25
-
±15
-
kV
IEC61000-4-2 Contact Discharge
25
-
±8
-
kV
All Other Pins
Human Body Model
25
-
±3
-
kV
NOTES:
3. ISL4238E inputs utilize a positive feedback resistor. The input current is negligible when the input is at either supply rail.
4. An “edge” is defined as a transition through the transmitter or receiver input thresholds.
5. Skew is measured at the receiver input switching points (1.4V).
6. Skew is measured at the transmitter zero crossing points.
7. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization
and are not production tested.
Electrical Specifications
Test Conditions: ISL4238E VCC = 3.15V to 5.5V, C1 to C4 = 0.1F; VCC = 3V, C1 to C4 = 0.22F;
ISL424xE VCC = 3V to 5.5V, C1 to C4 = 0.1F; Unless Otherwise Specified. Typicals are at TA = +25°C
PARAMETER
TEST CONDITIONS
TEMP
(°C)
MIN
(Note 7)
TYP
MAX
(Note 7) UNITS
ISL4238E, ISL4244E, ISL4245E
相关PDF资料 |
PDF描述 |
|---|---|
| MS27656T21A35SA | CONN RCPT 79POS WALL MNT W/SCKT |
| VI-J3K-MX-F4 | CONVERTER MOD DC/DC 40V 75W |
| MS27656E21A35SA | CONN RCPT 79POS WALL MNT W/SCKT |
| VI-J3K-MX-F3 | CONVERTER MOD DC/DC 40V 75W |
| MS3108E22-14S | CONN PLUG 19POS RT ANG W/SCKT |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL4241E | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:QFN Packaged, +/-15kV ESD Protected, +2.7V to +5.5V, 10Nanoamp, 250kbps, RS-232 Transmitters/Receivers |
| ISL4241EIR | 功能描述:IC 3DRVR/5RCVR RS232 3V 32-QFN RoHS:否 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:25 系列:- 类型:收发器 驱动器/接收器数:2/2 规程:RS232 电源电压:4.5 V ~ 5.5 V 安装类型:通孔 封装/外壳:16-DIP（0.300"，7.62mm） 供应商设备封装:16-PDIP 包装:管件 |
| ISL4241EIR-T | 功能描述:IC 3DRVR/5RCVR RS232 3V 32-QFN RoHS:否 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:25 系列:- 类型:收发器 驱动器/接收器数:2/2 规程:RS232 电源电压:4.5 V ~ 5.5 V 安装类型:通孔 封装/外壳:16-DIP（0.300"，7.62mm） 供应商设备封装:16-PDIP 包装:管件 |
| ISL4241EIRZ | 功能描述:IC 3DRVR/5RCVR RS232 3V 32-QFN RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 类型:发射器 驱动器/接收器数:4/0 规程:RS422，RS485 电源电压:4.75 V ~ 5.25 V 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC 包装:带卷 (TR) |
| ISL4241EIRZ-T | 功能描述:IC XMITTER/RCVR ESD RS232 32-QFN RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:2,500 系列:- 类型:驱动器 驱动器/接收器数:4/0 规程:RS422 电源电压:4.5 V ~ 5.5 V 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC N 包装:带卷 (TR) |
发布紧急采购，3分钟左右您将得到回复。