ZiLOG Worldwide Headquarters 532 Race Street San Jose, CA 95126-3432
Telephone: 408.558.8500 Fax: 408.558.8300
www.ZiLOG.com
Product Specification
PS024903-1005
ZHX1423
SIR UltraSlim
TM
Transceivers
PS024903-1005
This publication is subject to replacement by a later edition. To determine whether
a later edition exists, or to request copies of publications, contact:
ZiLOG Worldwide Headquarters
532 Race Street
San Jose, CA 95126-3432
Telephone: 408.558.8500
Fax: 408.558.8300
www.ZiLOG.com
ZiLOG is a registered trademark of ZiLOG Inc. in the United States and in other countries. All other
products and/or service names mentioned herein may be trademarks of the companies with which
they are associated.
Document Disclaimer
2005 by ZiLOG, Inc. All rights reserved. Information in this publication concerning the devices,
applications, or technology described is intended to suggest possible uses and may be superseded.
ZiLOG, INC. DOES NOT ASSUME LIABILITY FOR OR PROVIDE A REPRESENTATION OF
ACCURACY OF THE INFORMATION, DEVICES, OR TECHNOLOGY DESCRIBED IN THIS
DOCUMENT. ZiLOG ALSO DOES NOT ASSUME LIABILITY FOR INTELLECTUAL PROPERTY
INFRINGEMENT RELATED IN ANY MANNER TO USE OF INFORMATION, DEVICES, OR
TECHNOLOGY DESCRIBED HEREIN OR OTHERWISE. Devices sold by ZiLOG, Inc. are covered
by warranty and limitation of liability provisions appearing in the ZiLOG, Inc. Terms and Conditions of
Sale. ZiLOG, Inc. makes no warranty of merchantability or fitness for any purpose. Except with the
express written approval of ZiLOG, use of information, devices, or technology as critical components
of life support systems is not authorized. No licenses are conveyed, implicitly or otherwise, by this
document under any intellectual property rights.
ZHX1423
SIR UltraSlim Transceivers
PS024903-1005
iii
Table of Contents
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
VCC Positive Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
GND Ground 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SD Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
RXD Receive Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
TXD Transmit Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
LEDA LED Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Application Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Electrical and Timing Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
ZHX1423 Tape and Reel Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
ZHX1423 Soldering and Cleaning Recommendations . . . . . . . . . . . . . . . . . . . . 8
Reflow Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Manual Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Moisture Prevention Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Baking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Mechanical Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Customer Feedback Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Customer Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Product Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Return Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Problem Description or Suggestion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
ZHX1423
SIR UltraSlim Transceivers
PS024903-1005
iv
List of Figures
Figure 1. ZHX1423 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2. ZHX1423 Application Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . 4
Figure 3. ZHX1423 Reel Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 4. ZHX1423 Tape Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 5. ZHX1423 Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 6. ZHX1423 Mechanical Specification . . . . . . . . . . . . . . . . . . . . . . . . . 10
List of Tables
Table 1.
ZHX1423 Transceiver Pin Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Table 2.
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Table 3.
Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . 5
Table 4.
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
ZHX1423
SIR UltraSlim Transceivers
PS024903-1005
1
Description
The ZILOG ZHX1423 for PDAs, internet appliances, medical electronics, and gen-
eral-purpose interactive handheld devices is the smallest, lowest power, and high-
est functional standard-power (01 meter minimum range) transceiver available.
The ZiLOG ZHX1423 features exclusive AlwaysOn
TM
technology that allows the
transceiver to "listen" for an IrDA communication at a typical current of 6 A,
allowing the default mode to be left on with negligible effect on the battery life.
The UltraSlim form factor (7.3 mm long x 2.8 mm wide x 1.9 mm high) allows
placement in virtually any small device. Application circuit space is also minimized
because only two external components are required.
The ZHX1423 is designed to support IrDA-Data SIR mode (115.2 Kbits/s) and pro-
vides typical data links with other standard-power IrDA transceivers up to 1.0
meter away.
The transceiver combines an IRED emitter, a PIN photodiode, and a unique
driver/control ASIC in a single package, as shown in Figure 1.
Figure 1. ZHX1423 Block Diagram
The ZILOG ZHX1423 also features a shutdown control that minimizes current
draw to 0.1
A typical.
ZHX1423
SIR UltraSlim Transceivers
PS024903-1005
2
Features
Compliant to IrDA Data Specification 1.4 Standard Power SIR
Low-power supply voltage range: 2.4 to 3.6 V
ZHX1423 listening current: only 6
A (typically) at 3.0 V (ZiLOG exclusive)
UltraSlim package: 7.3 mm long x 2.8 mm high x 1.9 mm wide
Extended operating temperature range: 30 C to +85 C
Internal current source eliminates need for a current-limiting resistor for IR
LED
Meets IEC 825-1 Class 1 eye safety specifications
Pin Description
Table 1 lists the pin out for the ZHX1423 transceivers. The pins are described in
this section.
V
CC
Positive Supply
(Power)
Connect to positive power supply (2.43.6 V). Filter with a 1.0-
F ceramic bypass
capacitor and terminating resistor as close as possible to the V
CC
pin.
Table 1. ZHX1423 Transceiver Pin Out
Pin
Name
Function
I/O
1
NC
NC (future use)
--
2
V
CC
Supply voltage
--
3
GND
Ground
--
4
SD
Shutdown
I
5
RXD
Receiver output
O
6
TXD
Transmitter input
I
7
LEDA
IRED anode
--
ZHX1423
SIR UltraSlim Transceivers
PS024903-1005
3
GND Ground
(Power)
Connect to ground of the power supply. A solid ground plane is recommended for
proper operation.
SD Shutdown
(Input, active high)
This input is used to place the transceiver into a shutdown mode.
RXD Receive Data
(Output, active low)
This output provides received serial data. It is a tri-state, slew rate controlled
CMOS output (tri-stated during shutdown) driver capable of driving a standard
CMOS or LS series TTL load. No external resistor is required.
TXD Transmit Data
(Input, active high)
This CMOS input is used to transmit serial data and has an internal pull-down
resistor that is enabled during shutdown.
LEDA LED Driver
(Output, active low)
This output is internally connected to the LED anode and contains an internal
current source. The voltage range on this pad is 2.24.2 volts.
ZHX1423
SIR UltraSlim Transceivers
PS024903-1005
4
Application Block Diagrams
Figure 2 shows the application block diagrams for the ZHX1423 transceivers.
Figure 2. ZHX1423 Application Block Diagrams
ZHX1423
ZHX1423
=2.4 to 4.2 V
ZHX1423
SIR UltraSlim Transceivers
PS024903-1005
5
Electrical and Timing Specifications
Table 2, Table 3, and Table 4 list the electrical and timing specifications.
Table 2. Absolute Maximum Ratings
Parameter
Symbol
Min
Max
Unit
Comment
Supply voltage
V
CC
0.3
3.6
V
V
CC
, GND
Supply voltage
V
LED
0.3
4.4
V
Input voltage
V
IN
GND0.3
V
CC
+0.3
V
TXD, SD
Output (Ext.) voltage V
OUT
GND0.3
V
CC
+0.3
V
RXD
Storage temperature T
ST
40
100
C
Solder temperature
T
SOL
230
C
ESD
400
V
Table 3. Recommended Operating Conditions
Parameter
Symbol
Min
Max
Unit
Supply voltage
V
CC
2.4
3.6
V
Supply voltage, LEDA
V
LED
2.4
4.2
V
Ambient operating temperature
T
OP
30
85
C
Table 4. Electrical Characteristics
Parameter
Symbol Condition
Min
Typical Max Unit
Remarks
High-level input
voltage
V
IH
0.75V
CC
V
TXD, SD
Low-level input
voltage
V
IL
0.4
V
TXD, SD
High-level output
voltage
V
OH
I
OH
=100
A
V
CC
0.4
V
RXD
Low-level output
voltage
V
OL
I
OL
=100
A
0.4
V
RXD
Transmitter current
I
LED
260
320 mA
Listening current
I
CC
6
A
ZHX1423
SIR UltraSlim Transceivers
PS024903-1005
6
Receive current
I
CC
100
125
A
Idle
Standby current
I
STB
0.1
1.0
A
SD=V
CC
, TXD=0 V
RXD pulse width
t
PWA
SIR<115.2 Kbps
1.0
5
s
Input pulse=1.6
s;
rise/fall time<600 ns
Power shutdown
time
T
SD
1
s
Startup time
T
STU
200
s
Latency
T
RRT
150
s
Transmitter LED
timeout
130
270
s
Protects LED when
TXD is left high
Rise/fall time
T
r
, T
f
Cload=25 pF
10
40
ns
Trans. radiant
intensity
I
E
I
LED
=260 mA
40
100 mW/sr
On-axis
Minimum threshold
irradiance
E
emin
V
CC
=3.3 V
4
W/cm
2
h,
v<(+15
)
Maximum input
irradiance
E
emax
V
CC
=3.3 V
500
mW/cm
2
h,
v<(+15
)
Peak wavelength
870
nm
Unless otherwise noted: V
CC
=3.3 V, GND=0 V, TA=25
C
Note: To minimize power dissipation, the part has been designed for optimal operation in 1.6
s mode. If
used in the 3/16
th
pulse duration mode, some devices will exhibit a phantom RxD pulse at 9.6 Kbits/s.
Table 4. Electrical Characteristics (Continued)
Parameter
Symbol Condition
Min
Typical Max Unit
Remarks
ZHX1423
SIR UltraSlim Transceivers
PS024903-1005
7
ZHX1423 Tape and Reel Specifications
Figure 3 shows the ZHX1423 reel specifications, and Figure 4 shows the
ZHX1423 tape specifications.
Figure 3. ZHX1423 Reel Specifications
Figure 4. ZHX1423 Tape Specifications
0.4 0.05
2.85 0.1
Polari ty
N/C(1pin)
(3.075)
(1.0)
(2.0)
1.0 0.1
0.9
1.5
4 0.1
8 0.1
2 0.1
+0.1
- 0
(4
)
(7
.1
)
(
6
.
75)
7
.
5
0.
1
1
.
7
5
0
.
1
16
0
.
2
LE DA(7pin)
0.4 0.05
2.85 0.1
Polari ty
N/C(1pin)
(3.075)
(1.0)
(2.0)
1.0 0.1
0.9
1.5
4 0.1
8 0.1
2 0.1
+0.1
- 0
(4
)
(7
.1
)
(
6
.
75)
7
.
5
0.
1
1
.
7
5
0
.
1
16
0
.
2
LE DA(7pin)
ZHX1423
SIR UltraSlim Transceivers
PS024903-1005
8
ZHX1423 Soldering and Cleaning Recommendations
Follow these recommendations to maintain the performance of the ZHX1423
transceivers.
Reflow Soldering
Please refer to ZiLOG's Lead-Free Solder Reflow: Packaging
Application Note (AN0161, http://www.zilog.com/docstools.asp)
for more information about the solder profile.
Manual Soldering
Use 63/37 or silver solder.
Temperature at solder iron tip: no more than 280
C
Finish soldering within 3 seconds.
Handle only after the ZHX1423 transceivers have cooled off.
Cleaning
Perform cleaning under the following conditions:
Cleaning agent: alcohol
Temperature and time 30 seconds below 50
C or 3 minutes below 30 C
Ultrasonic cleaning: below 20 W
Note:
ZHX1423
SIR UltraSlim Transceivers
PS024903-1005
9
Moisture Prevention Guidelines
To avoid moisture absorption during transportation and storage, ZHX1423 reels
are packed in aluminum envelopes (see Figure 5) that contain a desiccant with a
humidity indicator. While this packaging is an impediment to moisture absorption,
it is by no means absolute, and no warranty is implied. The user must store these
parts in a controlled environment to prevent moisture entry. Please read the label
on the aluminum bag for indicator instructions.
Figure 5. ZHX1423 Packaging
Baking
Parts that have been stored over 12 months or unpacked over 72 hours should be
baked under the following guidelines.
Reels
60 C for 48 hours or more
Loose Parts
100 C for 4 hours or more
or
125 C for 2 hours or more
or
150 C for 1 hour or more
ZHX1423
SIR UltraSlim Transceivers
PS024903-1005
10
Mechanical Specification
Figure 6 shows the mechanical specification for the ZHX1423 transceivers.
Figure 6. ZHX1423 Mechanical Specification
Ordering Information
Use the following information to order the ZHX1423 transceivers:
All ZiLOG devices are available lead free. ZHX1423 has
always been lead free. These devices meet or exceed RoHS
Directive 2002/95/EC. For additional information, please
see the ZiLOG Quality and Reliability web page at
http://www.zilog.com/quality/index.asp.
ZHX1423TA115THTR
with AlwaysOn Listen
2,500 per reel
Note:
ZHX1423
SIR UltraSlim Transceivers
PS024903-1005
11
Customer Feedback Form
If you experience any problems while operating this product, or if you note any inaccura-
cies while reading this product specification, please copy and complete this form, then
mail or fax it to ZiLOG (see Return Information, below). We also welcome your sugges-
tions!
Customer Information
Product Information
Return Information
ZiLOG
System Test/Customer Support
532 Race Street
San Jose, CA 95126-3432
Fax: (408) 558-8300
Web: www.zilog.com
Problem Description or Suggestion
Provide a complete description of the problem or your suggestion. If you are reporting a
specific problem, include all steps leading up to the occurrence of the problem. Attach
additional pages as necessary.
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