參數(shù)資料
型號(hào)： ICL3244ECA-T
廠商： Intersil
文件頁(yè)數(shù)： 5/20頁(yè)
文件大?。?/td> 0K
描述： IC 3DRVR/5RCVR RS232 3V 28-SSOP
標(biāo)準(zhǔn)包裝： 1,000
類型： 收發(fā)器
驅(qū)動(dòng)器/接收器數(shù)： 3/5
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： 28-SSOP（0.209"，5.30mm 寬）
供應(yīng)商設(shè)備封裝： 28-SSOP
包裝： 帶卷 (TR)
13
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-.
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.
Operation Down to 2.7V
ICL32XXE transmitter outputs meet RS-562 levels (±3.7V),
at full data rate, with VCC as low as 2.7V. RS-562 levels
typically ensure inter operability with RS-232 devices.
Transmitter Outputs when Exiting
Powerdown
Figure 10 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.
Mouse Driveability
The ICL3244E is specifically designed to power a serial
mouse while operating from low voltage supplies. Figure 11
shows the transmitter output voltages under increasing load
current. The on-chip switching regulator ensures the
transmitters will supply at least ±5V during worst case
conditions (15mA for paralleled V+ transmitters, 7.3mA for
single V- transmitter).
High Data Rates
The ICL32XXE maintain the RS-232 ±5V minimum
transmitter output voltages even at high data rates. Figure 12
details a transmitter loopback test circuit, and Figure 13
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 14 shows the
loopback results for a single transmitter driving 1000pF and
an RS-232 load at 250kbps. The static transmitters were
also loaded with an RS-232 receiver.
TABLE 3. REQUIRED CAPACITOR VALUES
VCC
(V)
C1
(
F)
C2, C3, C4
(
F)
3.0 to 3.6
0.1
4.5 to 5.5
0.047
0.33
3.0 to 5.5
0.1
0.47
TIME (20
s/DIV.)
T1
T2
2V/DIV.
5V/DIV.
VCC = +3.3V
FORCEOFF
FIGURE 10. TRANSMITTER OUTPUTS WHEN EXITING
POWERDOWN
C1 - C4 = 0.1
F
5V/DIV.
READY
FIGURE 12. TRANSMITTER LOOPBACK TEST CIRCUIT
FIGURE 11. TRANSMITTER OUTPUT VOLTAGE vs LOAD
CURRENT (PER TRANSMITTER, i.e., DOUBLE
CURRENT AXIS FOR TOTAL VOUT+ CURRENT)
TRANSMIT
T
E
R
OU
TP
U
T
V
O
L
T
A
G
E
(V
)
LOAD CURRENT PER TRANSMITTER (mA)
02
468
10
-6
-4
-2
0
2
4
6
-5
-3
-1
1
3
5
13579
VOUT+
VOUT -
VCC
VOUT+
VOUT -
T1
T2
T3
VCC = 3.0V
ICL3244E
ICL32XXE
VCC
C1
C2
C4
C3
+
1000pF
V+
V-
5K
TIN
ROUT
C1+
C1-
C2+
C2-
RIN
TOUT
+
VCC
0.1
F
VCC
FORCEOFF
FORCEON
ICL3224E, ICL3226E, ICL3244E
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ICL3244ECA-TS2705 制造商:Rochester Electronics LLC 功能描述: 制造商:Intersil Corporation 功能描述:
ICL3244ECAZ 功能描述:RS-232接口集成電路 RS232 3V 3D/5R 15KV E-DWN COM 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(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝:
ICL3244ECAZ-T 功能描述:RS-232接口集成電路 RS232 3V 3D/5R 15KV E-DWN COMEL 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(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝:
ICL3244ECB 制造商:Rochester Electronics LLC 功能描述:RS232 3V 3D/5R 15KV E-DWN 28SOIC COM - Bulk 制造商:Intersil Corporation 功能描述:
ICL3244ECB-T 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel
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