ZT32xxE Low Power +3V to +5.5V, 250kbps RS232 Transceivers
Zywyn Corporation
Zywyn
Features
• Meets EIA/TIA-232F and CCITT V.28/V.24 speci-
fications for V
CC
at +3.3V ±10% and +5V ±10%
• Low Quiescent Current: 0.5mA typ., 1mA max.
• Low Shutdown Current (where applicable): 1µA
typical, 10µA max.
• Guaranteed Data Rate 250kbps
• Proprietary Switch-Capacitor Regulated Volt-
age Converters (patent pending)
• Proprietary AUTOGREEN Power Saving (patent
pending)
• Latch-up Free
• ESD Protection for RS-232 I/O's
±15kV Human Body Model (HBM)
±15kV EN61000-4-2 Air Gap Discharge
±8kV EN61000-4-2 Contact Discharge
• Drop-in Replacements for MAX3220E, SP3220E,
MAX3221E, ICL3221E, MAX3222E, ICL3222E,
SP3222E, MAX3223E, ICL3223E, SP3223E,
MAX3232E, ICL3232E, SP3232E, LT1385 and
SP385E
• High Data Rate at 1000kbps Available on
ZT32xxF Series
ZT3220E, ZT3221E, ZT3222E,
ZT3223E, ZT3232E, ZT1385E
Low Power +3V to +5.5V, 250kbps RS232 Transceivers
General Description
The ZT32xxE series devices are 3V powered EIA/TIA-232
and V.28/V.24 communication interfaces with low power
requirements. They consist of two line drivers, two line
receivers and the proprietary switch-capacitor regulated
voltage converters. The ZT3220E has a 1Tx and 1Rx configu-
ration. These devices operate from a single 3V to 5.5V
power supply at the guaranteed data rate of 250k bits/sec
with enhanced electrostatic discharge (ESD) protection in
all RS232 I/O pins exceeding ±15kV EN61000-4-2 Air Gap
Discharge and ±8kV EN61000-4-2 Contact Discharge.
The ZT3221E and ZT3223E features the AUTOGREEN
(patent pending) proprietary function which automatically
powers down the on-chip regulated voltage converters
and driver circuits when an RS-232 cable is disconnected
from the host interface or when a connected peripheral
device is turned off.
ZT32xxE
Applications
•
•
•
•
•
•
•
Battery-Powered And Hand-Held Applications
Notebooks, Subnotebooks, and Palmtops
Industrial and Embedded PCs
Data Cables for Cell Phones and PDAs
Terminal Adapters and POS terminals
Peripherals interface
Routers and HUBs
C1+
V+
C1-
C2+
C2-
V-
T2OUT
R2IN
1
2
3
4
5
6
7
8
Zywyn
ZT3232E
16
15
14
13
12
11
10
9
V
CC
GND
T1OUT
R1IN
R1OUT
T1IN
T2IN
R2OUT
Now Available in Green Package Option
Product Selection Guide
RS232
RS232
Data Rate 15KV ESD Receiver SHUTDOWN
Part Number Power Supply Drivers Receivers (kbps) IEC1000 4-2 Enable
Enable
ZT3220E
ZT3221E
ZT3222E
ZT3232E
ZT3223E
ZT1385E
+3V to +5.5V
+3V to +5.5V
+3V to +5.5V
+3V to +5.5V
+3V to +5.5V
+3V to +5.5V
1
1
2
2
2
2
1
1
2
2
2
2
250
250
250
250
250
250
RS232 I/O
RS232 I/O
RS232 I/O
RS232 I/O
RS232 I/O
RS232 I/O
YES
YES
YES
NO
YES
NO
YES
YES
YES
NO
YES
YES
AUTOGREEN Number
Function
of Pins Package Type
NO
YES
NO
NO
YES
NO
16
16
18, 20
16
20
18, 20
SSOP, TSSOP, WSOIC
SSOP, TSSOP
18-WSOIC
20-SSOP, 20-TSSOP,
NSOIC, WSOIC, SSOP,
TSSOP
SSOP, TSSOP
18-WSOIC, 20-SSOP
Zywyn
Specifications subject to change without notice
1
Zywyn Corporation • Tel (408) 733-3225 • Fax (408) 733-3206 • Email sales@zywyn.com • www.zywyn.com
May 2005
rev. 04
Analog electronics
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