MAX1741EUB+T Maxim Integrated Products, MAX1741EUB+T Datasheet - Page 7

• Manufacturer Part Number: MAX1741EUB+T
• Description: IC TRANSLATOR LEVEL 10-UMAX
• Manufacturer: Maxim Integrated Products

Specifications of MAX1741EUB+T

• Applications: Smart Card
• Interface: MICROWIRE™, QSPI™, Serial, SPI™
• Voltage - Supply: 1.43 V ~ 5.5 V, 2.25 V ~ 5.5 V
• Package / Case: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The MAX1740/MAX1741 provide the necessary level
translation for interfacing with subscriber identity mod-
ules (SIMs) and smart cards in multivoltage systems.
These devices operate with logic supply voltages
between +1.425V and +5.5V on the controller side
(DV
(V
(max) while operating in an idle state (see Electrical
Characteristics). Figure 2 shows a typical application cir-
cuit and functional diagram.
The MAX1740/MAX1741 provide level translators for a
clock input, a reset input, and a bidirectional data
input/output. The clock and reset inputs (CIN and RIN)
are level shifted from the controller-side supply rails
(DV
GND). When connected to an open-drain controller out-
put, DATA and IO provide bidirectional level translation.
MAX1740
CC
CC
CC
). The total supply current (I
10
—
1
2
3
4
5
6
7
8
9
) and between +2.25V and +5.5V on the card side
to GND) to the card-side supply rails (V
PIN
MAX1741
10
—
1
2
3
4
5
6
7
8
9
_______________________________________________________________________________________
Detailed Description
NAME
DDRV
SHDN
DATA
DV
GND
RST
CLK
V
CIN
RIN
IO
CC
CC
DVCC
Level Translation
SIM/Smart Card Level Translators
System Controller Data Input/Output. An open-drain input/output with a 20kΩ pull-up
resistor to DV
capable of sinking 1mA while pulling DATA low. If the controller is not open drain, use
DDRV to send data and DATA to receive data.
Supply Voltage for System Controller Digital Pins. Set at +1.425V to +5.5V.
System Controller Clock Input
System Controller Reset Input
Optional System Controller Data Input. Connect to controllers without an open-drain out-
put. When not used, connect DDRV to DV
Shutdown Mode Input. Driving SHDN low reduces the total supply current to less than
2µA. In shutdown mode, RST, CLK, and IO are actively pulled low and the transfer gate
between DATA and IO is disabled. When not used, connect SHDN to DV
System Controller and Card Ground
Reset Output to Card. Actively pulled low during shutdown.
Clock Output to Card. Actively pulled low during shutdown.
Supply Voltage for Card-Side Digital Pins. Set at +2.25V to +5.5V. Proper supply bypass-
ing is required to meet ±10kV ESD specifications.
Card-Side Bidirectional Input/Output. An open-drain output with a 10kΩ pull-up resistor to
V
ing 1mA while pulling IO low. Actively pulled low during shutdown.
CC
+ I
. For bidirectional data transfer, connect to an open-drain card output capable of sink-
VCC
) is 2.5µA
CC
CC
. For bidirectional data transfer, connect to an open-drain controller output
to
Figure 1. MAX1740/MAX1741 Test Circuit
+1.8V
NOTE: ALL CAPACITANCES INCLUDE CAPACITIVE LOADS OF
TEST PROBES AND BOARD LAYOUT.
30pF
FUNCTION
*
CC
SHDN FOR MAX1740 ONLY
DDRV FOR MAX1741 ONLY
.
DV
SHDN*
RIN
CIN
DDRV*
DATA
CC
MAX1740
MAX1741
CLK
GND
V
RST
CC
IO
Pin Description
in µMAX
30pF
CC
.
30pF 30pF
+3.0V OR
+5.0V
7