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
Zywyn Corporation
Absolute Maximum Ratings
These are stress ratings only and functional operation of
the device at these ratings or any other above those
indicated in the operation sections of the specifications is
not implied. Exposure to absolute maximum rating condi-
tions for extended periods of time may affect reliability.
Power Supply, (V
CC
) .................................. –0.3V to +6.0V
V+ .............................................................. –0.3V to +7.0V
V– ............................................................... +0.3V to –7.0V
|
V+| +
|
V-| ............................................................... +13.0V
|
|
I
CC
(DC V
CC
or GND current) ............................... ±100mA
Input Voltages
TxIN,GREEN, SHUTDOWN, EN ................ –0.3V to +6.0V
RxIN .......................................................................... ±25V
Output Voltages
TxOUT ....................................................................... ±15V
RxOUT, IDLE ................................... –0.3V to (V
CC
+0.3V)
Short-Circuit Duration
TxOUT .............................................................. Continuous
Operating Temperature ............................. –40°C to +85°C
Storage Temperature .............................. –65°C to +150°C
Power Dissipation Per Package
16-pin SSOP (derate 7.20mW/°C above +70°C) ....
16-pin nSOIC (derate 10.00mW/°C above +70°C) .
16-pin WSOIC (derate 10.10mW/°C above +70°C)
16-pin TSSOP (derate 6.80mW/°C above +70°C) ..
16-pin PDIP (derate 11.20mW/°C above +70°C) ....
18-pin PDIP (derate 12.60mW/°C above +70°C) ....
18-pin WSOIC (derate 11.10mW/°C above +70°C)
20-pin PDIP (derate 12.80mW/°C above +70°C) ....
20-pin SSOP (derate 8.10mW/°C above +70°C) ....
20-pin TSSOP (derate 7.20mW/°C above +70°C) ..
ZT32xxE
Storage Considerations
Storage in a low humidity environment is preferred. Large
high density plastic packages are moisture sensitive and
should be stored in Dry Vapor Barrier Bags. Prior to usage,
the parts should remain bagged and stored below 40°C
and 60%RH. If the parts are removed from the bag, they
should be used within 48 hours or stored in an environ-
ment at or below 20%RH. If the above conditions cannot
be followed, the parts should be baked for four hours at
125°C in order remove moisture prior to soldering. Zywyn
ships product in Dry Vapor Barrier Bags with a humidity
indicator card and desiccant pack. The humidity indicator
should be below 30%RH.
The information furnished by Zywyn has been carefully
reviewed for accuracy and reliability. Its application or
use, however, is solely the responsibility of the user. No
responsibility of the use of this information become part of
the terms and conditions of any subsequent sales agree-
ment with Zywyn. Specifications are subject to change
without the responsibility for any infringement of patents
or other rights of third parties which may result from its
use. No license or proprietary rights are granted by impli-
cation or otherwise under any patent or patent rights of
Zywyn Corporation.
584mW
720mW
787mW
556mW
896mW
962mW
850mW
976mW
647mW
584mW
Zywyn
Specifications subject to change without notice
2
May 2005
rev. 04
Zywyn Corporation
Electrical Characteristics
ZT32xxE
Unless otherwise stated, V
CC
= +3.0V to +5.0V, T
A
= T
min
to T
max
, C1 to C4 = 0.1µF, typical values apply at V
CC
= +3.3V or +5.0V and T
A
= 25°C.
Parameter
TTL Logic Input
TTL Logic Output
RS-232 Input
RS-232 Output
Charge Pump Pin
Power Pin
Charge Pump Caps
Temp 0°C to +70°C
Temp –40°C to +85°C
V
CC
Voltage Range
Supply Current
Supply Current,
AUTOGREEN Disabled
Supply Current,
AUTOGREEN Enabled
Supply Current,
SHUTDOWN Enabled
TTL LOGIC Input
Input Threshold Low
Input Threshold High
Input Threshold High
Input Hysteresis
Input Leakage Current
Input Leakage Current
TTL LOGIC Output
Output Voltage Low
Output Voltage High
Output Leakage Current
Receiver Input
Input Voltage Range
Input Threshold Low
Input Threshold High
Input Hysteresis
Input Resistance
Transmitter Output
Output Voltage Swing
Output Resistance
OutputShort-CircuitCurrent
Output Leakage Current
R
L
= 3kΩ, All Outputs are loaded
V
CC
= V
DD
= V
SS
= GND, V
OUT
= ±2V
V
OUT
= GND
Transmitter Disabled, V
OUT
= ±12V
±5
300
±60
±5
V
Ω
mA
µA
T
A
= T
min
– T
max
T
A
= 25°C, V
CC
= 5.0V
T
A
= 25°C, V
CC
= 3.3V
V = 25°C
T
A
= 25°C
V
IN
= ±25V, T
A
= 25°C
–25
0.8
0.6
25
1.5
1.2
2.4
0.5
3
7
V
V
V
V
V
kΩ
I
OUT
= 1.6mA
I
OUT
= –1.0mA
Receiver Outputs Disabled, V
OUT
= V
CC
or GND,
SHUTDOWN = GND, EN = V
CC
0.4
V
CC
–0.6 V
CC
–0.1
±0.05
±10
V
V
µA
0.8
V
CC
= +5.0V Supply
V
CC
= +3.3V Supply
V
IN
= V
CC
and GND, TIN, EN, GREEN, SHUTDOWN
V
IN
= V
CC
and GND, TIN (For ZT1385E)
2.4
2
0.5
±0.01
50
±1
200
V
V
V
V
µA
µA
Condition
T
1
IN, T
2
IN, GREEN, SHUTDOWN, EN
R
1
OUT, R
2
OUT, IDLE
R
1
IN, R
2
IN
T
1
OUT, T
2
OUT
C
1
P, C
1
N, C
2
P, C
2
N
V
CC
, V
GND
, V
DD
, V
SS
C
1
P, C
1
N, C
2
P, C
2
N
Commercial Grade
Industrial Grade
V
CC
= +5.0V Supply
V
CC
= +3.3V Supply
TTL Inputs = V
CC
/GND, RS-232 Input = float,
V
CC
= 3.3V (For ZT3220E, ZT3222E, ZT3232E and ZT1385E)
GREEN = V
CC
, (For ZT3221E and ZT3223E); SHUTDOWN = V
CC
,
(For ZT3221E, ZT3222E, ZT1385E and ZT3223E),
TTL Inputs = V
CC
/GND, RS-232 Input = float, V
CC
= 3.3V
GREEN = GND, (For ZT3221E and ZT3223E); SHUTDOWN = V
CC
,
(For ZT3221E, ZT3222E, ZT1385E and ZT3223E),
TTL Inputs = V
CC
/GND, RS-232 Input = float, V
CC
= 3.3V
GREEN = V
CC
/GND, (For ZT3221E and ZT3223E);
SHUTDOWN = GND, (For ZT3221E, ZT3222E, ZT1385E and ZT3223E),
TTL Inputs = V
CC
/GND, RS-232 Inputs = float, V
CC
= 3.3V
0.1
0
–40
4.5
3
0.1
+25
+25
5
3.3
0.5
1
+70
+85
5.5
3.6
1
µF
°C
°C
V
V
mA
Min
Typ
Max
Units
0.5
1
mA
1
10
µA
1
10
µA
Zywyn
3
Specifications subject to change without notice
May 2005
rev. 04
Zywyn Corporation
Parameter
Timing Characteristics
Maximum Data Rate
Transition-Region Slew Rate
Receiver Propagation t
PLH
Receiver Propagation t
PHL
Receiver Skew
Receiver Output Enable Time
Receiver Output Disable Time
AUTOGREEN Timing
Receiver Input to IDLE Output High
Receiver Input to IDLE Output Low
Power Save Mode
to Transmitter Enabled
ESD Tolerance
ESD HBM
EN61000-4-2ContactDischarge
EN61000-4-2AirGapDischarge
RS-232 Inputs and Outputs
RS-232 Inputs and Outputs
RS-232 Inputs and Outputs
±15
±8
±15
For ZT3221E and ZT3223E only
For ZT3221E and ZT3223E only
For ZT3221E and ZT3223E only
1
30
100
R
L
= 3kΩ, C
L
= 1000pF, One Transmitter Switching, T
A
= 25°C
Refers to Figure 1 and 2.
R
L
= 3~7kΩ, CL = 150pF to 1000pF, One Transmitter Switching,
T
A
= 25°C, Measured from 3V to –3V or –3V to 3V
C
L
= 150pF
C
L
= 150pF
t
PHL
– t
PLH
For ZT3220E, ZT3221E, ZT3222E, ZT3223E only
For ZT3220E, ZT3221E, ZT3222E, ZT3223E only
250
6
0.15
0.15
50
0.2
0.2
Condition
Min
Typ
ZT32xxE
Max
Units
kbps
30
V/µs
µs
µs
ns
µs
µs
µs
µs
µs
kV
kV
kV
Product Cross Reference
Part Number
ZT3220E
ZT3221E
ZT3222E
ZT3232E
ZT3223E
ZT1385E
Pin-to-Pin
Cross MAXIM
MAX3220E
MAX3220
MAX3221E
MAX3221
MAX3222E
MAX3222
MAX3232E
MAX3232
MAX3223E
MAX3223
n/a
Pin-to-Pin
Cross Intersil
n/a
ICL3221E
ICL3221
ICL3222E
ICL3222
ICL3232E
ICL3232
ICL3223E
ICL3223
n/a
Pin-to-Pin
Cross TI
MAX3220E
MAX3221E
MAX3221
MAX3222E
MAX3222
MAX3232E
MAX3232
MAX3223E
MAX3223
LT1385
Pin-to-Pin
Cross ST-M
n/a
n/a
ST3222E
ST3222
ST3232E
ST3232
n/a
n/a
Pin-to-Pin
Cross Sipex
SP3220E
n/a
SP3222E
SP3222EB
SP3232E
SP3232EB
SP3223E
SP3223EB
SP385E
Zywyn
Specifications subject to change without notice
4
May 2005
rev. 04
Zywyn Corporation
Pin Description
Pin Numbers
ZT3220E
16 Pins
1
ZT3221E
16 Pins
1
ZT3222E
18 Pins 20 Pins
1
1
ZT3232E
16 Pins
–
ZT1385E
18 Pins 20 Pins
–
–
ZT3223E
20 Pins
1
EN
Name
Description
ZT32xxE
Receiver Enable. Logic low for
Normal operation. Logic high to
force the receiver outputs into
high impedance state
Positive terminal of the
boostrapped voltage switch
capacitor
Regulated +5.4V output
generated by the voltage
converter
Negative terminal of the
boostrapped voltage switch
capacitor
Positive terminal of the inverted
voltage switch capacitor
Regulated –5.7V output
generated by the voltage
converter
Negative terminal of the inverted
voltage switch capacitor
First RS232 receiver input
Second RS232 receiver input
First TTL/CMOS receiver output
Second TTL/CMOS receiver
output
First TTL/CMOS transmitter input
Second TTL/CMOS transmitter
input
First RS232 transmitter output
Second RS232 transmitter
output
TTL/CMOS output indicating
AUTOGREEN or SHUTDOWN
status
2
2
2
2
1
2
2
2
C1+
3
3
3
3
2
3
3
3
V+
4
4
4
4
3
4
4
4
C1-
5
7
5
7
5
7
5
7
4
6
5
7
5
7
5
7
C2+
V-
6
8
–
9
–
11
–
13
–
–
6
8
–
9
–
11
–
13
–
10
6
14
9
13
10
12
11
15
8
–
6
16
9
15
10
13
12
17
8
–
5
13
8
12
9
11
10
14
7
–
6
14
9
13
10
12
11
15
8
–
6
16
9
15
12
14
13
17
8
–
6
16
9
15
10
13
12
17
8
11
C2-
R1 IN
R2 IN
R1 OUT
R2 OUT
T1 IN
T2 IN
T1 OUT
T2 OUT
IDLE
16
16
18
20
–
18
20
20
SHUTDOWN Shutdown control. A logic LOW
to disable drivers and voltage
converter
GREEN
A logic HIGH to override AUTO-
GREEN circuitry keeping
transmitters ON.
(SHUTDOWN must be HIGH)
Ground
+3V to +5.5V Supply Voltage
No connect
–
12
–
–
–
–
–
14
14
15
10, 12
14
15
–
16
17
–
18
19
11, 14
15
16
–
16
17
1
18
19
1, 10, 11
18
19
–
GND
V
CC
NC
Zywyn
5
Specifications subject to change without notice
May 2005
rev. 04
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