MAX14502AETL+ Maxim Integrated Products, MAX14502AETL+ Datasheet - Page 9

• Manufacturer Part Number: MAX14502AETL+
• Description: IC CARD READER USB-SD 40-TQFN
• Manufacturer: Maxim Integrated Products
• Type: Smart Card Interface ICr

Specifications of MAX14502AETL+

• Applications: USB
• Interface: I²C
• Voltage - Supply: 1.8 V ~ 3.3 V
• Package / Case: 40-TQFN Exposed Pad
• Mounting Type: Surface Mount
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

INPUTS/OUTPUTS
USB INTERFACE
SD CARD INTERFACE
TQFN
25
27
22
21
20
19
28
13
12
11
1
2
3
4
6
7
8
9
PIN
WLP
C4
C6
G7
G8
C8
C7
A2
B4
A3
B6
A7
B7
E6
F5
F7
F8
E5
B8
_______________________________________________________________________________________
BERR/INT
CDAT1_0
CDAT1_1
CDAT1_2
I2C_SEL
KVBUS
NAME
MODE
BUSY
FREF
RREF
ADD
CD+
HD+
SCL
SDA
RST
CD-
HD-
I
I2C_SEL low to disable I
I
the I
I
I
I
slave addresses: (GND = 1110 000Xb and V
Card Reader Error/Interrupt Output. BERR/INT becomes BERR for simple control and
INT for I
during simple control and asserts for enabled interrupts during I
Busy Output. BUSY asserts low to indicate device is in Card Reader mode.
Card Reader/Pass Thru Mode Select Input. MODE is only active during simple
control. Drive MODE low to enable Pass Thru mode and drive MODE high to enable
Card Reader mode. For I
Reset Input. Drive RST low to reset the internal registers to default values and put all
outputs in high impedance. Connect RST to V
Frequency Input. FREF is the clock input (12MHz/13MHz/19.2MHz/26MHz) for the
internal logic and USB PHY. FREF can accept a square-wave or sine-wave clock. An
internal clock squaring circuit can be enabled or disabled through I
control, the internal clock squarer is enabled by default.
Reference Resistor. Connect a Bias Resistor 6.19kΩ ±1% from RREF to GND.
USB Analog Switch/Hi-Speed USB Transceiver. CD+ connects to D+ on the USB
connector.
USB Analog Switch/Hi-Speed USB Transceiver. CD- connects to D- on the USB
connector.
USB Analog Switch. HD+ connects to D+ on the host side.
USB Analog Switch. HD- connects to D- on the host side.
USB Bus Power-Supply Detection Input. Connect a resistor-divider between USB
VBUS, KVBUS, and GND.
SD Card 1 Data Bus Analog Switch/Card Reader Interface. CDAT1_0 connects to
DAT0 on the SD card.
SD Data Card 1 Bus Analog Switch/Card Reader Interface. CDAT1_1 connects to
DAT1 on the SD card.
SD Data Card 1 Bus Analog Switch/Card Reader Interface. CDAT1_2 connects to
DAT2 on the SD card.
2
2
2
2
2
C Select Input. I2C_SEL must be connected to V
C Serial-Clock Input. SCL is +3.6V tolerant and the high threshold is set by V
C Serial-Data I/O. SDA is +3.6V tolerant and the high threshold is set by V
C interface is not used, connect SDA to GND.
C Address Selection Input. Connect ADD to V
2
C interface is not used, connect SCL to GND.
2
C control. BERR/INT goes low to indicate an error in Card Reader mode
Hi-Speed USB-to-SD Card
2
2
C control and drive I2C_SEL high to enable I
C control, MODE must be connected to GND.
Readers with Bypass
FUNCTION
IO
IO
= 1110 001Xb).
IO
for normal operation.
or GND to select between two I
IO
or GND at power-up. Drive
Pin Description
2
C control.
2
C. In simple
2
C control.
IO
. If the
IO
. If
2
C
9