參數(shù)資料
型號(hào)： ISL4221EIR-T
廠商： INTERSIL CORP
元件分類(lèi)： 通用總線功能
英文描述： QFN Packaged, +/-15kV ESD Protected, +2.7V to +5.5V, 150Nanoamp, 250kBps, RS-232 Transmitters/Receivers
中文描述： LINE TRANSCEIVER, PQCC16
封裝： 5 X 5 MM, PLASTIC, QFN-16
文件頁(yè)數(shù)： 9/13頁(yè)
文件大小： 401K
代理商： ISL4221EIR-T
9
Note that the transmitters enable only when the magnitude
of the supplies exceed approximately 3V.
Operation Down to 2.7V
ISL422XE transmitter outputs meet RS-562 levels (
±
3.7V), at
the full data rate, with V
CC
as low as 2.7V. RS-562 levels
typically ensure inter operability with RS-232 devices.
High Data Rates
The ISL422XE maintain the RS-232
±
5V minimum
transmitter output voltages even at high data rates. Figure 9
details a transmitter loopback test circuit, and Figure 10
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 11 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.
Interconnection with 3V and 5V Logic
The ISL422XE directly interface with 5V CMOS and TTL
logic families. Nevertheless, with the ISL422XE at 3.3V, and
the logic supply at 5V, AC, HC, and CD4000 outputs can
drive ISL422XE inputs, but ISL422XE outputs do not reach
the minimum V
IH
for these logic families. See Table 3 for
more information.
FIGURE 9. TRANSMITTER LOOPBACK TEST CIRCUIT
TIME (20
μ
s/DIV.)
T1
T2
2V/DIV.
5V/DIV.
V
CC
= +3.3V
C1 - C4 = 0.1
μ
F
FORCEOFF
FIGURE 8. TRANSMITTER OUTPUTS WHEN EXITING
POWERDOWN
ISL422XE
V
CC
FORCEOFF
C
1
C
2
C
4
+
C
3
+
+
+
1000pF
V+
V-
5k
T
IN
R
OUT
C1+
C1-
C2+
C2-
R
IN
T
OUT
+
V
CC
0.1
μ
F
V
CC
FORCEON
FIGURE 10. LOOPBACK TEST AT 120kBps
FIGURE 11. LOOPBACK TEST AT 250kBps
TABLE 3. LOGIC FAMILY COMPATIBILITY WITH VARIOUS
SUPPLY VOLTAGES
SYSTEM
POWER-SUPPLY
VOLTAGE
(V)
V
CC
SUPPLY
VOLTAGE
(V)
COMPATIBILITY
3.3
3.3
Compatible with all CMOS
families.
5
5
Compatible with all TTL and
CMOS logic families.
5
3.3
Compatible with ACT and HCT
CMOS, and with TTL. ISL422XE
outputs are incompatible with AC,
HC, and CD4000 CMOS inputs.
T1
IN
T1
OUT
R1
OUT
5
μ
s/DIV.
V
CC
= +3.3V
C1 - C4 = 0.1
μ
F
5V/DIV.
T1
IN
T1
OUT
R1
OUT
2
μ
s/DIV.
5V/DIV.
V
CC
= +3.3V
C1 - C4 = 0.1
μ
F
ISL4221E, ISL4223E
相關(guān)PDF資料
PDF描述
ISL4223EIR-T QFN Packaged, +/-15kV ESD Protected, +2.7V to +5.5V, 150Nanoamp, 250kBps, RS-232 Transmitters/Receivers
ISL4221E QFN Packaged, +/-15kV ESD Protected, +2.7V to +5.5V, 150Nanoamp, 250kbps, RS-232 Transmitters/Receivers(QFN 封裝, +/-15kV ESD 防護(hù), +2.7V至+5.5V, 150毫微安, 250kbps, RS-232收發(fā)器)
ISL4223E QFN Packaged, +/-15kV ESD Protected, +2.7V to +5.5V, 150Nanoamp, 250kbps, RS-232 Transmitters/Receivers(QFN 封裝, +/-15kV ESD 防護(hù), +2.7V至+5.5V, 150毫微安, 250kbps, RS-232收發(fā)器)
ISL4221 QFN Packaged, +/-15kV ESD Protected, +2.7V to +5.5V, 150Nanoamp, 250kBps, RS-232 Transmitters/Receivers
ISL4221EIR QFN Packaged, +/-15kV ESD Protected, +2.7V to +5.5V, 150Nanoamp, 250kBps, RS-232 Transmitters/Receivers
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