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BD8919F_1 Datasheet, PDF (1/16 Pages) Rohm – IC Care Interface ICs with Built-in Low LDO Regulator | |||
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IC Card Interface ICs
IC Card Interface ICs
with Built-in Low Noise LDO Regulator
BD8918F,BD8918FV,BD8919F,BD8919FV
No.09056EDT01
âOverview
This is an interface IC for a 5V smart card.
It works as a bidirectional signal buffer between a smart card and a controller. Also, it supplies 5V power to a smart card.
With an electrostatic breakdown voltage of more than HBM; ±6000V, it protects the card contact pins.
âFeatures
1) 1 half duplex bidirectional buffers
2) Protection against short-circuit for all the card contact pins
3) 5V power source for the card (VCC)
4) Over-current protection for card power source
5) Built-in thermal shutdown circuit
6) Built-in supply voltage detector
7) Automatic activation/deactivation sequence function for card contact pin
Activation sequence: driven by a signal from controller (CMDVCCBï©)
Deactivation sequence: driven by a signal from controller (CMDVCCBï¨) and fault detection (card removal, short
circuit of card power, IC overheat detection, VDD or VDDP drop)
8) Card contact pin ESD voltage ⧠±6000V
9) Recommend frequency of crystal oscillator: 8MHz (BD8918F/FV), 16MHz (BD8919F/FV)
10) Programmable for card clock division of output signal: 1/1 and 1/2(BD8918F/FV), 1/2 and 1/4(BD8919F/FV).
11) RST output control by RSTIN input signal (positive output)
12) One multiplexed card status output by OFFB signal
âApplications
Interface for CLASS A smart cards
Interface for B-CAS cards
âLine up matrix
Part No
BD8918F
BD8918FV
BD8919F
BD8919FV
Card clock
Ratio of dividing frequency
1/1f, 1/2f
1/2f, 1/4f
Package
SOP16
SSOP-B16
SOP16
SSOP-B16
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
1/15
2010.4 - Rev.D
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