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MAX562CAIMAXIMN/a88avaiComplete 230kbps, 2.7V to 5.25V Serial Interface for Notebook Computers
MAX562CAIMAXIM ?N/a20avaiComplete 230kbps, 2.7V to 5.25V Serial Interface for Notebook Computers
MAX562CWIMAXN/a5avaiComplete 230kbps, 2.7V to 5.25V Serial Interface for Notebook Computers
MAX562EAIMAXIM ?N/a20avaiComplete 230kbps, 2.7V to 5.25V Serial Interface for Notebook Computers


MAX562CAI ,Complete 230kbps, 2.7V to 5.25V Serial Interface for Notebook ComputersApplicationsMAX562CWI 0°C to +70°C 28 SOPalmtop, Notebook, and SubnotebookMAX562CAI 0°C to +70°C 28 ..
MAX562CAI ,Complete 230kbps, 2.7V to 5.25V Serial Interface for Notebook ComputersGeneral Description ________
MAX562CAI+ ,Complete 230kbps, 2.7V to 5.25V Serial Interface for Notebook ComputersApplicationsMAX562CWI 0°C to +70°C 28 SOPalmtop, Notebook, and SubnotebookMAX562CAI 0°C to +70°C 28 ..
MAX562CWI ,Complete 230kbps, 2.7V to 5.25V Serial Interface for Notebook ComputersFeaturesThe MAX562 is designed specifically for notebook and' 230kbps Data Rate, LapLink™ Compatibl ..
MAX562EAI ,Complete 230kbps, 2.7V to 5.25V Serial Interface for Notebook ComputersMAX56219-0144; Rev. 0; 9/93Complete 230kbps, 2.7V to 5.25VSerial Interface for Notebook Computers__ ..
MAX562EWI+ ,Complete 230kbps, 2.7V to 5.25V Serial Interface for Notebook ComputersFeaturesThe MAX562 is designed specifically for notebook and♦ 230kbps Data Rate, LapLink™ Compatibl ..
MAZ8024 ,Small-signal deviceelectrical characteristicswithin part numbersReverse current I V Specified value µ AR R*3Temperatur ..
MAZ8027-H ,Silicon planar typeElectrical characteristics within part numbers T = 25°CaTemperaturecoefficient ofZener voltage Rev ..
MAZ8027-L ,Silicon planar typeElectrical Characteristics T = 25°CaParameter Symbol Conditions Min Typ Max UnitForward voltage V ..
MAZ8030-H ,Silicon planar typeelectrical characteristicsZ Zwithin part numbersReverse current I V ··············· Specified value ..
MAZ8030-L ,Silicon planar typeZener DiodesMAZ8000 SeriesSilicon planar typeUnit : mmFor stabilization of power supplyKA
MAZ8033-H ,Silicon planar typeElectrical characteristics within part numbers T = 25°CaTemperaturecoefficient ofZener voltage Rev ..


MAX562CAI-MAX562CWI-MAX562EAI
Complete 230kbps, 2.7V to 5.25V Serial Interface for Notebook Computers
19-0144; Rev. 0; 9/93
_______________General Description

The MAX562 is designed specifically for notebook and
palmtop computers that need to transfer data quickly.
It runs at data rates up to 230kbps, and has a guaran-
teed 4V/µs slew rate. This device meets the new
EIA/TIA-562 standard that guarantees compatibility with
RS-232 interfaces.
The MAX562 has low-power shutdown and keep-awake
modes. In keep-awake mode, the transmitters are dis-
abled but all receivers are active, allowing unidirection-
al communication. In shutdown mode, the entire chip is
disabled and all outputs are in a high-impedance state.
The MAX562 is available in a standard 28-pin SO pack-
age, and in a smaller footprint shrink small-outline
package (SSOP).
________________________Applications

Palmtop, Notebook, and Subnotebook
Computers
Peripherals
Battery-Powered Equipment
____________________________Features
230kbps Data Rate, LapLink™CompatibleOperates from a 2.7V to 5.25V SupplyDesigned for EIA/TIA-562 and EIA/TIA-232 ApplicationsGuaranteed 4.0V/µs Slew Rate3 Drivers, 5 ReceiversFlow Through PinoutLow-Power Shutdown and Keep-Awake ModesLow-Cost, Surface-Mount External Capacitors
______________Ordering Information

* Contact factory for dice specifications.
MAX562
Complete 230kbps, 2.7V to 5.25V
Serial Interface for Notebook Computers
________________________________________________________________Maxim Integrated Products1
__________________Pin Configuration
__________Typical Operating Circuit
Call toll free 1-800-998-8800 for free samples or literature.

™ LapLink is a registered trademark of Traveling Software, Inc.
MAX562
Complete 230kbps, 2.7V to 5.25V
Serial Interface for Notebook Computers_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS

VCC.........................................................................-0.3V to +6V................................................................(VCC- 0.3V) to +6V............................................................................+0.3V to -6V
C1A+, C1B+..................................................-6V to (V+ + 0.3V)
C1A-, C1B-, C2+........................................-0.3V to (V+ + 0.3V)
C2-..................................................................(V- - 0.3V) to +6V
Input Voltages
TIN, EN, SHDN........................................-0.3V to (VCC+ 0.3V)
RIN....................................................................................±25V
Output Voltages
TOUT...............................................................................±15V
ROUT......................................................-0.3V to (VCC+ 0.3V)
Short-Circuit Duration
TOUT to GND........................................................Continuous
ROUTto GND, VCC................................................Continuous
Continuous Power Dissipation (TA= +70°C)(derate 12.50mW/°C above +70°C)..................1000mW
SSOP(derate 9.52mW/°C above +70°C).................762mW
Operating Temperature Ranges:
MAX562C_ _.....................................................0°C to +70°C
MAX562E_ _..................................................-40°C to +85°C
Storage Temperature Range...........................-65°C to +160°C
Lead Temperature (soldering, 10sec)...........................+300°C
ELECTRICAL CHARACTERISTICS

(VCC= 2.7V to 5.25V, C1A = C1B = C2 = C4 = 0.33µF, C3 = 0.68µF, TA= TMINto TMAX, unless otherwise noted.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
MAX562
Complete 230kbps, 2.7V to 5.25V
Serial Interface for Notebook Computers
_______________________________________________________________________________________3
AC CHARACTERISTICS
MAX562
Complete 230kbps, 2.7V to 5.25V
Serial Interface for Notebook Computers_______________________________________________________________________________________
__________________________________________Typical Operating Characteristics

8.0
7.5
7.0
6.5
6.0
5.5
5.0
4.5
4.002000300040005000
CL(pF)
SLEW RATE (V/µs)
TRANSMITTER SLEW RATE
vs. LOAD CAPACITANCE
-1
-2
-3
-4
-5
-6-404080
TEMPERATURE (°C)
TRANSMITTER OUTPUT VOLTAGE (V-, V+)
TRANSMITTER OUTPUT VOLTAGE
vs. TEMPERATURE

-1
-2
-3
-4
-5
-602000300040005000
CL (pF)
TRANSMITTER OUTPUT VOLTAGE (V-, V+)
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE, TO 231kbps
38
36
34
32
30
28
26
24
22
202.53.54.0
VCC (V)
SUPPLY CURRENT (mA)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
38
36
34
32
30
28
26
24
22-404080
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
SUPPLY CURRENT
vs. TEMPERATURE

55
50
45
40
35
30
25
20100150
DATA RATE (kbps)
SUPPLY CURRENT (mA)
SUPPLY CURRENT
vs. TRANSMITTER DATA RATE

60
55
50
45
40
35-404080
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
SUPPLY CURRENT
vs. TEMPERATURE
__________________________________________Typical Operating Characteristics

(VCC= 3.3V, C1A = C1B = C2 = C4 = 0.33µF, C3 = 0.68µF, TA=+25°C, unless otherwise noted.)
MAX562
Complete 230kbps, 2.7V to 5.25V
Serial Interface for Notebook Computers
_______________________________________________________________________________________5

Figure 1. Transmitter Propagation Delay Timing
Figure 2. Receiver Propagation Delay Timing
______________________________________________________________Pin Description
MAX562
Complete 230kbps, 2.7V to 5.25V
Serial Interface for Notebook Computers_______________________________________________________________________________________
_______________Detailed Description

The MAX562 has three sections: the charge-pump voltage
converter, the drivers (transmitters), and the receivers.
Charge-Pump Voltage Converter

The charge-pump voltage converter is used to produce a
positive and a negative supply to drive the transmitters. The
positive voltage (V+) is generated by a regulated charge
pump working as either a doubler or a tripler (depending on
the VCClevel) and using capacitors C1A, C1B and C3 (see
Typical Operating Circuit). The negative voltage (V-) derives
from V+ using a simple charge-pump inverter that employs
capacitors C2 and C4.
These charge-pump converters are regulated to give output
voltages of +5.8V and -5.2V. Having regulated supplies
generated on-chip makes the MAX562's performance insen-
sitive to variations in VCCfrom 2.7V to 5.25V, transmitter load-
ing changes, and operating temperature changes.
When SHDNis low, the charge pumps are disabled, V+ is
internally connected to VCC, and V- is internally connected to
GND.
EIA/TIA-562 Drivers

The driver output voltage is guaranteed to meet the ±3.7V
EIA/TIA-562 specification over the full range of operating
temperatures and voltages, when each transmitter is
loaded with up to 3kΩand operated up to 230kbps (see
Typical Operating Characteristics). The typical driver out-
put voltage swing exceeds ±4V with a 3kΩload on all
transmitter outputs. The open-circuit output voltage swing
is typically from (V+ - 0.7V) to (V- + 0.7V). Output swing is
not significantly dependent on VCCsince the charge
pumps are regulated.
Input thresholds are CMOS and TTL compatible. Connect
unused inputs to VCCor to GND.
When SHDNis low, the driver outputs are off and their leak-
age currents are less than 10µA, even if the transmitter
outputs are back-driven between -7V and +15V. Taking
SHDNlow does not disable the receivers.
When SHDNand EN are both low, the entire chip is
disabled and all outputs are high impedance. Power
consumption is lowest in this condition. Exiting shutdown
takes about 100µs, but depends on VCC. Figure 5 shows
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