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參數(shù)資料
| 型號(hào)： | ISL83387 |
| 廠商： | Intersil Corporation |
| 英文描述： | +/-15kV ESD Protected, +3V to +5.5V, 1Microamp, 250kbps, RS-232 Transceivers with Enhanced Automatic Powerdown and a Separate Logic Supply |
| 中文描述： | / - 15kV的ESD保護(hù)，3V至5.5V，1Microamp，250kbps的，RS - 232接口的增強(qiáng)型自動(dòng)掉電和一個(gè)單獨(dú)的邏輯電源收發(fā)器 |
| 文件頁(yè)數(shù)： | 7/13頁(yè) |
| 文件大小： | 317K |
| 代理商： | ISL83387 |
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7
FN6040.1
July 8, 2005
mode an RC time constant after this rising edge. The time
constant isn’t critical, because the ISL83387E remains
powered up for 30 seconds after the FORCEON falling edge,
even if there are no signal transitions. This gives slow-to-
wake systems (e.g., a mouse) plenty of time to start
transmitting, and as long as it starts transmitting within 30
seconds both systems remain enabled.
V
L
Logic Supply Input
Unlike other RS-232 interface devices where the CMOS
outputs swing between 0 and V
CC
, the ISL83387E features
a separate logic supply input (V
L
; 1.8V to 5V, regardless of
V
CC
) that sets V
OH
for the receiver and INVALID outputs.
Connecting V
L
to a host logic supply lower than V
CC
,
prevents the ISL83387E outputs from forward biasing the
input diodes of a logic device powered by that lower supply.
Connecting V
L
to a logic supply greater than V
CC
ensures
that the receiver and INVALID output levels are compatible
even with the CMOS input V
IH
of AC, HC, and CD4000
devices. Note that the V
L
supply current increases to 100
μ
A
with V
L
= 5V and V
CC
= 3.3V (see Figure 16). V
L
also
powers the transmitter and logic inputs, thereby setting their
switching thresholds to levels compatible with the logic
supply. This separate logic supply pin allows a great deal of
flexibility in interfacing to systems with different logic
supplies. If logic translation isn’t required, connect V
L
to the
ISL83387E V
CC
.
INVALID Output
The INVALID output always indicates (see Table 2) whether
or not 30
μ
s have elapsed with invalid RS-232 signals (see
TABLE 2. POWERDOWN LOGIC TRUTH TABLE
RCVR OR XMTR
EDGE WITHIN 30
SEC
FORCEOFF
INPUT
FORCEON
INPUT
TRANSMITTER
OUTPUTS
RECEIVER
OUTPUTS
RS-232 LEVEL
PRESENT AT
RECEIVER INPUT
INVALID
OUTPUT
MODE OF OPERATION
NO
H
H
Active
Active
NO
L
Normal Operation (Enhanced
Auto Powerdown Disabled)
NO
H
H
Active
Active
YES
H
YES
H
L
Active
Active
NO
L
Normal Operation (Enhanced
Auto Powerdown Enabled)
YES
H
L
Active
Active
YES
H
NO
H
L
High-Z
Active
NO
L
Powerdown Due to Enhanced
Auto Powerdown Logic
NO
H
L
High-Z
Active
YES
H
X
L
X
High-Z
Active
NO
L
Manual Powerdown
X
L
X
High-Z
Active
YES
H
INVALID DRIVING FORCEON AND FORCEOFF
(EMULATES AUTOMATIC POWERDOWN)
X
NOTE 3
NOTE 3
Active
Active
YES
H
Normal Operation
X
NOTE 3
NOTE 3
High-Z
Active
NO
L
Forced Auto Powerdown
NOTES:
3. Input is connected to INVALID Output.
FIGURE 2. CONNECTIONS FOR MANUAL POWERDOWN
PWR
MGT
LOGIC
FORCEOFF, FORCEON
CPU
I/O
ISL83387E
UART
V
L
I/O CHIP
POWER SUPPLY
V
CC
INVALID
FIGURE 3. CIRCUIT TO ENSURE IMMEDIATE POWER UP
WHEN EXITING FORCED POWERDOWN
FORCEOFF
FORCEON
POWER
MANAGEMENT
UNIT
MASTER POWERDOWN LINE
1M
0.1
μ
F
ISL83387E
ISL83387E
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL83387E | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:+/-15kV ESD Protected, +3V to +5.5V, 1Microamp, 250kbps, RS-232 Transceivers with Enhanced Automatic Powerdown and a Separate Logic Supply |
| ISL83387E_05 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:+/-15kV ESD Protected, +3V to +5.5V, 1Microamp, 250kbps, RS-232 Transceivers with Enhanced Automatic Powerdown and a Separate Logic Supply |
| ISL83387EIV | 功能描述:IC TXRX RS-232 ESD 24-TSSOP 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: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) |
| ISL83387EIV-T | 功能描述:IC 3DRVR/3RCVR RS232 3V 24-TSSOP 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 |
| ISL83387EIVZ | 功能描述:RS-232接口集成電路 W/ANNEAL RS232 3V 3D /3R 15KV SHTDWN 24LD 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: |
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