參數資料
| 型號： | ISL83220EIVZ-T |
| 廠商： | Intersil |
| 文件頁數： | 6/10頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC 1DRVR/1RCVR RS232 16-TSSOP |
| 產品培訓模塊： | Solutions for Industrial Control Applications |
| 標準包裝： | 2,500 |
| 類型： | 收發(fā)器 |
| 驅動器/接收器數： | 1/1 |
| 規(guī)程： | RS232 |
| 電源電壓： | 3 V ~ 5.5 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-TSSOP（0.173"，4.40mm 寬） |
| 供應商設備封裝： | 16-TSSOP |
| 包裝： | 帶卷 (TR) |
5
Detailed Description
The ISL83220E operates from a single +3V to +5.5V supply,
guarantees a 250kbps minimum data rate, requires only four
small external 0.1
μF capacitors, features low power
consumption, and meets all ElA RS-232C and V.28
specifications. The circuit is divided into three sections: The
charge pump, the transmitter, and the receiver.
Charge-Pump
Intersil’s new 3.3V 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 0.1
μF capacitors for the
voltage doubler and inverter functions, even at VCC = 3.3V.
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.
The transmitter output disables and assumes a high
impedance state when the device enters the powerdown
mode (see Table 2). This output may be driven to
±12V when
disabled.
All devices guarantee a 250kbps data rate for full load
conditions (3k
Ω and 1000pF), V
CC ≥ 3.0V. Under more
typical conditions of VCC ≥ 3.3V, RL = 3kΩ, and CL = 250pF,
the ISL83220E easily operates at 900kbps.
Transmitter inputs float if left unconnected, and may cause
ICC increases.
Receivers
The ISL83220E device contains a standard inverting
receiver that three-states via the EN control line. Receivers
convert RS-232 signals to CMOS output levels and accept
inputs up to
±25V while presenting the required 3kΩ to 7kΩ
input impedance (see Figure 1) even if the power is off
(VCC = 0V). The receiver’s Schmitt trigger input stage uses
hysteresis to increase noise immunity and decrease errors
due to slow input signal transitions.
TIMING CHARACTERISTICS
Maximum Data Rate
RL = 3kΩ, CL = 1000pF, One Transmitter Switching
Full
250
500
-
kbps
Transmitter Propagation Delay
Transmitter Input to
Transmitter Output,
RL = 3kΩ, CL = 1000pF
tPHL
25
-
1.0
-
μs
tPLH
25
-
1.0
-
μs
Receiver Propagation Delay
Receiver Input to Receiver
Output, CL = 150pF
tPHL
25
-
0.20
-
μs
tPLH
25
-
0.30
-
μs
Receiver Output Enable Time
Normal Operation
25
-
200
-
ns
Receiver Output Disable Time
Normal Operation
25
-
200
-
ns
Transmitter Skew
tPHL - tPLH (Note 2)
25
-
100
500
ns
Receiver Skew
tPHL - tPLH
Full
-
100
1000
ns
Transition Region Slew Rate
VCC = 3.3V,
RL = 3kΩ to 7kΩ,
Measured From 3V to -3V or
-3V to 3V
CL = 150pF to 2500pF
25
4
-
30
V/
μs
CL = 150pF to 1000pF
25
6
-
30
V/
μs
ESD PERFORMANCE
RS-232 Pins (TOUT, RIN)
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
-
±3-
kV
NOTE:
2. Transmitter skew is measured at the transmitter zero crossing points.
Electrical Specifications
Test Conditions: VCC = 3V to 5.5V, C1 - C4 = 0.1μF; Unless Otherwise Specified.
Typicals are at TA = 25°C (Continued)
PARAMETER
TEST CONDITIONS
TEMP
(°C)
MIN
TYP
MAX
UNITS
ISL83220E
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