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參數(shù)資料
| 型號(hào)： | MAX3314ECSA+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 4/8頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC TXRX RS232 460KBPS 8-SOIC |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 類型： | 收發(fā)器 |
| 驅(qū)動(dòng)器/接收器數(shù)： | 1/1 |
| 規(guī)程： | RS232 |
| 電源電壓： | 4.75 V ~ 5.25 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SOIC |
| 包裝： | 帶卷 (TR) |
MAX3314E
±15kV ESD-Protected, 460kbps, 1A,
RS-232-Compatible Transceiver
4
_______________________________________________________________________________________
Detailed Description
RS-232-Compatible Drivers
The transmitter is an inverting level translator that con-
verts CMOS-logic levels to ±3.7V EIA/TIA-232-compati-
ble levels. It guarantees data rates up to 460kbps with
worst-case loads of 3k
in parallel with 1000pF. When
SHDN is driven low, the transmitter is disabled and put
into tristate. The transmitter input does not have a pull-
up resistor. Connect to ground if unused.
RS-232-Compatible Receivers
The MAX3314E’s receiver converts RS-232 signals to
CMOS-logic output levels. The receiver is rated to
receive signals to ±25V. It will remain active during
shutdown mode.
MAX3314E Shutdown Mode
In shutdown mode, the transmitter output is put into high
impedance (Table 1). This reduces supply current to 1A.
The time required to exit shutdown is less than 2.5s.
Applications Information
Capacitor Selection
The capacitor type used is not critical for proper opera-
tion; either polarized or nonpolarized capacitors are
acceptable. If polarized capacitors are used, connect
polarity as shown in the Typical Operating Circuit.
Bypass VCC and V- to ground with at least 0.1F.
Transmitter Outputs When
Exiting Shutdown
Figure 1 shows the transmitter output when exiting
shutdown mode. The transmitter is loaded with 3k
in
parallel with 1000pF. The transmitter output displays no
ringing or undesirable transients as the MAX3314E
comes out of shutdown.
High Data Rates
The MAX3314E maintains minimum RS-232-compatible
±3.7V transmitter output voltage even at high data rates.
Figure 2 shows a transmitter loopback test circuit.
Figure 3 shows the loopback test result at 120kbps, and
Figure 4 shows the same test at 250kbps.
±15kV ESD Protection
As with all Maxim devices, ESD-protection structures are
incorporated on all pins to protect against electrostatic
discharges encountered during handling and assembly.
The MAX3314E driver outputs and receiver inputs have
extra protection against static discharge. Maxim’s engi-
neers have developed state-of-the-art structures to pro-
tect these pins against ESD of ±15kV without damage.
The ESD structures withstand high ESD in all states: nor-
mal operation, shutdown, and powered down. After an
ESD event, Maxim’s E versions keep working without
latchup, whereas competing products can latch and
must be powered down to remove latchup.
ESD protection can be tested in various ways. The trans-
mitter outputs and receiver inputs of the product family
are characterized for protection to the following limits:
±15kV using the Human Body Model
±8kV using the Contact Discharge method specified
in IEC 1000-4-2
±15kV using the IEC 1000-4-2 Air-Gap method
Pin Description
PIN
NAME
FUNCTION
1VCC
+5V
±5% External Power Supply. Decouple with a 0.1F capacitor to ground.
2
SHDN
Shutdown, Active low (0 = off, 1 = on).
3
ROUT
TTL/CMOS Receiver Output
4
TIN
TTL/CMOS Transmitter Input
5
TOUT
RS-232-Compatible Transmitter Output
6
RIN
RS-232-Compatible Receiver Input
7
V-
-5V
±5% External Power Supply. Decouple with a 0.1F capacitor to ground.
8
GND
Ground
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| MAX3314ECUA | 功能描述:RS-232接口集成電路 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: |
| MAX3314ECUA-T | 功能描述:RS-232接口集成電路 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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