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PDF MAX3228 Data sheet ( Hoja de datos )
| Número de pieza | MAX3228 | |
| Descripción | +2.5V to +5.5V RS-232 Transceivers in UCSP | |
| Fabricantes | Maxim Integrated | |
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19-2140; Rev 0; 8/01
+2.5V to +5.5V RS-232 Transceivers
in UCSP
General Description
The MAX3228/MAX3229 are +2.5V to +5.5V powered
EIA/TIA-232 and V.28/V.24 communications interfaces
with low power requirements, and high data-rate capa-
bilities, in a chip-scale package (UCSP™).
The MAX3228/MAX3229 achieve a 1µA supply current
with Maxim’s AutoShutdown™ feature. They save
power without changes to existing BIOS or operating
systems by entering low-power shutdown mode when
the RS-232 cable is disconnected, or when the trans-
mitters of the connected peripherals are off.
The transceivers have a proprietary low-dropout trans-
mitter output stage, delivering RS-232 compliant perfor-
mance from a +3.1V to +5.5V supply, and RS-232
compatible performance with a supply voltage as low
as +2.5V. The dual charge pump requires only four
small 0.1µF capacitors for operation from a +3.0V sup-
ply. Each device is guaranteed to run at data rates of
250kbps while maintaining RS-232 output levels.
The MAX3228/MAX3229 offer a separate power-supply
input for the logic interface, allowing configurable logic
levels on the receiver outputs and transmitter inputs.
Operating over a +1.65V to VCC range, VL provides the
MAX3228/MAX3229 compatibility with multiple logic
families.
The MAX3229 contains one receiver and one transmit-
ter. The MAX3228 contains two receivers and two
transmitters. The MAX3228/MAX3229 are available in
tiny chip-scale packaging and are specified across the
extended industrial temperature range of -40°C to
+85°C.
Applications
Personal Digital Assistants
Cell Phone Data Lump Cables
Set-Top Boxes
Hand-Held Devices
Cell Phones
Typical Operating Circuits continued at end of data sheet.
Pin Configurations appear at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
Features
o 6 ✕ 5 Chip-Scale Packaging (UCSP)
o 1µA Low-Power AutoShutdown
o 250kbps Guaranteed Data Rate
o Meets EIA/TIA-232 Specifications Down to +3.1V
o RS-232 Compatible to +2.5V Allows Operation
from Single Li+ Cell
o Small 0.1µF Capacitors
o Configurable Logic Levels
Ordering Information
PART
TEMP. RANGE
PIN-
PACKAGE
MAX3228EBV
MAX3229EBV
-40°C to +85°C
-40°C to +85°C
6 ✕ 5 UCSP*
6 ✕ 5 UCSP*
*Requires solder temperature profile described in the Absolute
Maximum Ratings section.
*UCSP reliability is integrally linked to the user’s assembly
methods, circuit board material, and environment. Refer to the
UCSP Reliabilitly Notice in the UCSP Reliability section of this
data sheet for more information.
Typical Operating Circuits
2.5V TO 5.5V 1.65V TO 5.5V
CBYPASS
C1
0.1µF
C2
0.1µF
TTL/CMOS
INPUTS
0.1µF
C1 C1+
A1
VCC
0.1µF
A5
VL
B1
V+
D1 C1-
A2 C2+
MAX3228
A4
V-
A3 C2-
A6 T1IN
VL
T1OUT E3
B6 T2IN
VL
T2OUT E4
D6 R1OUT
VL
R1IN E6
C3
0.1µF
C4
0.1µF
RS-232
OUTPUTS
TTL/CMOS
OUTPUTS
C6 R2OUT
5kΩ
VL
RS-232
INPUTS
R2IN E5
VL
20µA
B5 FORCEON
5kΩ
VL
INVALID E2
20µA
FORCEOFF C5
GND
E1
TO POWER-
MANAGEMENT
UNIT
VL
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1 page  
+2.5V to +5.5V RS-232 Transceivers
in UCSP
Typical Operating Characteristics (continued)
(VCC = +3.3V, 250kbps data rate, 0.1µF capacitors, all transmitters loaded with 3kΩ and CL, TA = +25°C, unless otherwise noted.)
OPERATING SUPPLY CURRENT
vs. SUPPLY VOLTAGE (MAX3229)
20
18
16
14
12
10
8
6
4
2
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
TRANSMITTER OUTPUT VOLTAGE vs.
SUPPLY VOLTAGE (VCC RISING)
10
8
6
4
VOH
2
0
-2 VOL
-4
-6
-8
2.5
3.0 3.5 4.0 4.5 5.0
SUPPLY VOLTAGE (V)
5.5
TRANSMITTER OUTPUT VOLTAGE vs.
SUPPLY VOLTAGE (VCC FALLING)
10
8
6
4
VOH
2
0
-2 VOL
-4
-6
-8
2.5
3.0 3.5 4.0 4.5 5.0
SUPPLY VOLTAGE (V)
5.5
Pin Description
PIN
MAX3228 MAX3229
A1 A1
A2 A2
A3 A3
A4 A4
A5 A5
A6, B6
A6
B1 B1
B2, B3, B4,
C2, C3, C4,
D2, D3, D4,
D5
B2, B3, B4,
C2, C3, C4,
D2, D3, D4,
D5
B5 B5
—
B6, D6,
E4, E6
C1 C1
NAME
VCC
C2+
C2-
V-
VL
T_IN
V+
N.C.
FORCEON
N.C.
C1+
FUNCTION
+2.5V to +5.5V Supply Voltage
Positive Terminal of Inverting Charge-Pump Capacitor
Negative Terminal of Inverting Charge-Pump Capacitor
-5.5V/-4.0V Generated by Charge Pump
Logic-Level Input for Receiver Outputs and Transmitter Inputs. Connect VL to the
system logic supply voltage or VCC if no logic supply is required.
Transmitter Input(s)
+5.5V/+4.0V Generated by Charge Pump. If charge pump is generating +4.0V, the part
has switched from RS-232 compliant to RS-232 compatible mode.
No Connection. These locations are not populated with solder bumps.
FORCEON Input, Active-High. Drive FORCEON high to override automatic circuitry,
keeping transmitters and charge pumps on. Pulls itself high internally if not connected.
No Connection. These locations are populated with solder bumps, but are electrically
isolated.
Positive Terminal of Positive Regulated Charge-Pump Capacitor
_______________________________________________________________________________________ 5
5 Page 
+2.5V to +5.5V RS-232 Transceivers
in UCSP
Table 5. Reliability Test Data
TEST
CONDITIONS
Temperature Cycle
Operating Life
Moisture Resistance
Low-Temperature Storage
-35°C to +85°C,
-40°C to +100°C
TA = +70°C
+20°C to +60°C, 90% RH
-20°C
Low-Temperature Operational -10°C
Solderability
ESD
High-Temperature Operating
Life
8hr steam age
±2000V, Human Body Model
TJ = +150°C
Typical Operating Circuits
(continued)
CBYPASS
C1
0.1µF
C2
0.1µF
TTL/CMOS
2.5V TO 5.5V 1.65V TO 5.5V
0.1µF
C1 C1+
D1 C1-
A2 C2+
A3 C2-
A6 T1IN
A1 A5
VCC
VL
B1
V+
MAX3229
VL
A4
V-
T1OUT E3
C6 R1OUT
VL
R1IN E5
0.1µF
C3
0.1µF
C4
0.1µF
RS-232
5kΩ
VL
20µA
B5 FORCEON
VL
INVALID E2
20µA
FORCEOFF C5
GND
E1
TO POWER-
MANAGEMENT
UNIT
VL
DURATION
150 cycles,
900 cycles
240hr
240hr
240hr
24hr
—
—
168hr
NO. OF FAILURES PER
SAMPLE SIZE
0/10,
0/200
0/10
0/10
0/10
0/10
0/15
0/5
0/45
UCSP Reliability
The UCSP represents a unique packaging form factor
that may not perform equally to a packaged product
through traditional mechanical reliability tests. CSP relia-
bility is integrally linked to the user’s assembly methods,
circuit board material, and usage environment. The user
should closely review these areas when considering use
of a CSP package. Performance through Operating Life
Test and Moisture Resistance remains uncompromised
as it is primarily determined by the wafer-fabrication
process.
Mechanical stress performance is a greater considera-
tion for a CSP package. CSPs are attached through
direct solder contact to the user’s PC board, foregoing
the inherent stress relief of a packaged product lead
frame. Solder joint contact integrity must be consid-
ered. Table 5 shows the testing done to characterize
the CSP reliability performance. In conclusion, the
UCSP is capable of performing reliably through envi-
ronmental stresses as indicated by the results in the
table. Additional usage data and recommendations are
detailed in the UCSP application note, which can be
found on Maxim’s website at www.maxim-ic.com.
Chip Information
TRANSISTOR COUNT: 698
PROCESS TECHNOLOGY: CMOS
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet MAX3228.PDF ] | |
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