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參數(shù)資料
| 型號： | ISL83384ECA |
| 廠商： | Intersil |
| 文件頁數(shù)： | 6/9頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC 2DRVR/2RCVR RS232 3V 20-SSOP |
| 標(biāo)準(zhǔn)包裝： | 66 |
| 類型： | 收發(fā)器 |
| 驅(qū)動(dòng)器/接收器數(shù)： | 2/2 |
| 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： | 20-SSOP（0.209"，5.30mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 20-SSOP |
| 包裝： | 管件 |
6
FN6017.3
March 15, 2005
Capacitor Selection
The charge pumps require 0.1
F or greater capacitors for
operation with 3.3V
≤ V
CC ≤ 5.5V. Increasing the capacitor
values (by a factor of 2) reduces ripple on the transmitter
outputs and slightly reduces power consumption. C2, C3,
and C4 can be increased without increasing C1’s value,
however, do not increase C1 without also increasing C2, C3,
and C4 to maintain the proper ratios (C1 to the other
capacitors).
When using minimum required capacitor values, make sure
that capacitor values do not degrade excessively with
temperature. If in doubt, use capacitors with a larger nominal
value. The capacitor’s equivalent series resistance (ESR)
usually rises at low temperatures and it influences the
amount of ripple on V+ and V-.
Operation Down to 2.7V
ISL83384E transmitter outputs meet RS-562 levels (±3.7V),
at the full data rate, with VCC as low as 2.7V. RS-562 levels
typically ensure interoperability with RS-232 devices.
Power Supply Decoupling
In most circumstances a 0.1
F bypass capacitor is
adequate. In applications that are particularly sensitive to
power supply noise, decouple VCC to ground with a
capacitor of the same value as the charge-pump capacitor C1.
Connect the bypass capacitor as close as possible to the IC.
Transmitter Outputs when Exiting
Powerdown
Figure 5 shows the response of two transmitter outputs
when exiting powerdown mode. As they activate, the two
transmitter outputs properly go to opposite RS-232 levels,
with no glitching, ringing, nor undesirable transients. Each
transmitter is loaded with 3k
in parallel with 2500pF. Note
that the transmitters enable only when the magnitude of the
supplies exceed approximately 3V.
High Data Rates
The ISL83384E maintains the RS-232 ±5V minimum
transmitter output voltages even at high data rates. Figure 6
details a transmitter loopback test circuit, and Figure 7
illustrates the loopback test result at 120Kbps. For this test,
all transmitters were simultaneously driving RS-232 loads in
parallel with 1000pF, at 120Kbps. Figure 8 shows the
loopback results for a single transmitter driving 1000pF and
an RS-232 load at 250Kbps. The static transmitter was also
loaded with an RS-232 receiver.
TIME (20
s/DIV)
T1
T2
2V/DIV
5V/DIV
VCC = +3.3V
SHDN
FIGURE 5. TRANSMITTER OUTPUTS WHEN EXITING
POWERDOWN
C1 - C4 = 0.1
F
FIGURE 6. TRANSMITTER LOOPBACK TEST CIRCUIT
FIGURE 7. LOOPBACK TEST AT 120Kbps
ISL83384E
VCC
C1
C2
C4
C3
+
1000pF
V+
V-
5K
TIN
ROUT
C1+
C1-
C2+
C2-
RIN
TOUT
+
VCC
0.1
F
VCC
SHDN
T1IN
T1OUT
R1OUT
5
s/DIV
VCC = +3.3V
5V/DIV
C1 - C4 = 0.1
F
ISL83384E
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| ISL83384ECA-T | 功能描述:IC 2DRVR/2RCVR RS232 3V 20-SSOP RoHS:否 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:25 系列:- 類型:收發(fā)器 驅(qū)動(dòng)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(yīng)商設(shè)備封裝:16-PDIP 包裝:管件 |
| ISL83384ECAZA | 功能描述:IC 2DRVR/2RCVR RS232 3V 20-SSOP RoHS:是 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:發(fā)射器 驅(qū)動(dòng)器/接收器數(shù):4/0 規(guī)程:RS422，RS485 電源電壓:4.75 V ~ 5.25 V 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC 包裝:帶卷 (TR) |
| ISL83384ECAZA-T | 功能描述:IC 2DRVR/2RCVR RS232 3V 20-SSOP RoHS:是 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):2/2 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(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR) |
| ISL83384ECB | 制造商:Rochester Electronics LLC 功能描述:RS232 3V 2D/2R 15KV SHUTDOWN 18SOIC COM - Bulk |
| ISL83384ECB-T | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:【15kV ESD Protected, +3V to +5.5V, 1 Microamp, 250Kbps, RS-232 Transmitter/Receiver |
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