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PDF ( 数据手册 , 数据表 ) SP330E

零件编号 SP330E
描述 RS-232/RS-485/RS-422 TRANSCEIVER
制造商 EXAR
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SP330E 数据手册, 描述, 功能
SP330E
RS-232/RS-485/RS-422 TRANSCEIVER WITH 1.65V-5.5V INTERFACE
November 2013
Rev. 1.0.0
GENERAL DESCRIPTION
The SP330 is an advanced multiprotocol transceiver
supporting RS-232, RS-485, and RS-422 serial
standards and featuring a variable low voltage logic
interface, down to 1.65V. Full operation requires only
four external charge pump capacitors.
The RS-485/RS-232 mode pin selects RS-485 mode
when high, and RS-232 mode when low. In RS-485
mode the HALF/FULL pin configures the transceiver
as either half or full duplex.
The high speed drivers operate up to 20Mbps in RS-
485/422 modes, and up to 1Mbps in RS-232 mode.
All drivers can be slew limited to 250kbps in any
mode to minimize electromagnetic interference (EMI)
by setting the dedicated SLEW pin low.
All transmitter outputs and receiver inputs feature
robust electrostatic discharge (ESD) protection to
±15kV IEC 61000-4-2 Airgap, ±15kV Human Body
Model (HBM) and ±8kV IEC 61000-4-2 Contact. Each
receiver output has full fail-safe protection to avoid
system lockup, oscillation, or indeterminate states by
defaulting to logic-high output level when the inputs
are open, shorted, or terminated but undriven. No
external biasing resistors are required.
The RS-232 receiver inputs include a 5kpull-down
to ground when in RS-232 mode. The RS-485/422
receiver inputs are high impedance (>96k), allowing
up to 256 devices on a single communication bus
(1/8th unit load).
The SP330 operates from a single power supply,
either 3.3V or 5V, with low idle current. The shutdown
mode consumes less than 1µA in low power standby
operation with RS-232 receivers enabled.
ORDERING INFORMATION
FEATURES
Robust ESD Protection:
±15kV IEC 61000-4-2 Air Gap Discharge
± 8kV IEC 61000-4-2 Contact Discharge
±15kV Human Body Model (HBM)
20Mbps RS-485 and 1Mbps RS-232 Data Rates
Pin-Selectable 250kbps Slew Limiting
Single Supply Operation from +3V to +5.5V
1.65V to 5.5V Logic Interface VL pin
2 Drivers, 2 Receivers RS-232/V.28
1 Driver, 1 Receiver RS-485/422
Full or Half Duplex Configuration
1/8th Unit Load, up to 256 receivers on bus
RS-485/422 Enhanced Receiver Fail-safe for open,
shorted, or terminated but idle inputs
10nA Shutdown Supply Current (typical)
Small 24 TSSOP package
TYPICAL APPLICATIONS
Software Programmable Serial Ports
(RS-232, RS-422, RS-485)
Industrial and Single Board Computers
Industrial and Process Control Equipment
Point-Of-Sale Equipment
HVAC Controls and Networking Equipment
Building Security and Automation
PART NUMBER
SP330EEY-L
SP330EEY-L/TR
PACKAGE
24-pin TSSOP
24-pin TSSOP
OPERATING TEMPERATURE RANGE
-40°C to +85°C
-40°C to +85°C
DEVICE STATUS
Active
Active
NOTE: SP330EEY-L and SP330EEY-L/TR are Green / RoHS Compliant
Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com
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SP330E pdf, 数据表
SP330E
RS-232/RS-485/RS-422 TRANSCEIVER WITH 1.65V-5.5V INTERFACE
PIN DESCRIPTIONS
REV. 1.0.0
Pin Name
1 C1+
2 VL
3 VCC
4 C1-
5 GND
6 T1OUT, B/Z
7 T2OUT, A/Y
8 R1OUT
9 R2OUT, RO
10
11 SHDN
12 SLEW
13 RS-485/RS-232
14 HALF/FULL
15 GND
16 R2IN, A
17 R1IN, B
18 RE
19 T2IN, DE
20 T1IN, DI
21 V-
22 C2-
23 C2+
24 V+
RS-232
RS-485 Full Duplex
RS-485 Half Duplex
Charge pump cap 1 positive lead, 0.1µF
Logic Supply for TTL Inputs and Outputs, VL = +1.65V to +5.5V or tie to VCC
Main Supply, VCC = +3.0V to +5.5V, bypass to ground with 1.0µF
Charge pump cap 1 negative lead
Ground
Transmitter 1 Output
Z Driver Neg Output
B/Z Neg Input/Output
Transmitter 2 Output
Y Driver Pos Output
A/Y Pos Input/Output
Receiver 1 Output
X
X
Receiver 2 Output
Receiver TTL Output
Receiver TTL Output
Low power shutdown mode when low
Data rate limited to 250kbps when low
011
X01
Ground
Receiver 2 Input
A Pos Receiver Input
X
Receiver 1 Input
B Neg Receiver Input
X
X Receiver enabled when low
Transmitter 2 Input
Driver enabled when high
Transmitter 1 Input
Driver TTL Input
Charge pump negative supply, 0.1µF from ground
Charge pump cap 2 negative lead
Charge pump cap 2 positive lead, 0.1µF
Charge pump positive supply, 0.1µF to ground
8
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SP330E equivalent, schematic
SP330E
RS-232/RS-485/RS-422 TRANSCEIVER WITH 1.65V-5.5V INTERFACE
FIGURE 11. RS-485/422 RECEIVER OUTPUT ENABLE/DISABLE TIMES
B
R RO
A
RE RL
CL
REV. 1.0.0
RE
VA = VCC
VB = 0V
RO
VL
0V
VOH
0V
VL
2
tRZH
VOH
2
B
R
A RE
VL
2
tRHZ
VOH - 0.25V
VL
RL
RO
CL
RE
VA = 0V
VB = VCC
RO
VL
0V
VL
VOL
VL
2
tRZL
VL + VOL
2
VL
2
tRLZ
VOL + 0.25V
16
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