bd8918fv ROHM Co. Ltd., bd8918fv Datasheet
bd8918fv
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... One multiplexed card status output by OFFB signal ●Applications Interface for CLASS A smart cards Interface for B-CAS cards ●Line up matrix Card clock Part No Ratio of dividing frequency BD8918F 1/1f, 1/2f BD8918FV BD8919F 1/2f, 1/4f BD8919FV www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. Package SOP16 SSOP-B16 SOP16 ...
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... Pd=500mW; however, reduce 4mW per 1°C when used at Ta ≥ 25°C. 0.6 0.5 0.4 0.3 0.2 0.1 0.0 0 100 125 150 Fig. 1.2 BD8918FV/BD8919FV Power Dissipation 2/15 Technical Note Notes Pin: XTAL1, XTAL2, CLKSEL, RSTIN, IO_U CMDVCCB, OFFB Pin: PRES, CLK, RST, IO_C T = -20 ~ +85°C (Refer to the following package power dissipation) Notes VCC ≥ 4.55V Package power ...
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... BD8918F,BD8918FV,BD8919F,BD8919FV ●Block Diagram 2.7V-5.5V VDD VIREF VDET LVS VDD 20k OFFB RSTIN 50k VDD 50k CMDVCCB CLK 50k CLKSEL DIV XTAL1 22pF 220Ω OSC XTAL 2 IO_U MAX 1MHz GND www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 0.1uF VREF TSD ...
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... BD8918F,BD8918FV,BD8919F,BD8919FV ●Pin Description Signal Pin No. Pin Name I/O Level 1 XTAL1 I VDD 2 XTAL2 O VDD 3 VDD S VDD 4 CLKSEL I VDD 5 RSTIN I VDD 6 IO_U I/O VDD 7 CGND S GND 8 IO_C I/O VCC 9 RST O VCC 10 CLK O VCC 11 VCC O VCC 12 VDDP S VDDP 13 PRES I VDD 14 OFFB O VDD 15 CMDVCCB I VDD 16 GND S GND *Capacitors to be connected to VDD, VDDP and VCC should be placed immediately next to the pins (ESR<100m). ...
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... BD8918F,BD8918FV,BD8919F,BD8919FV ●Pin Function Diagram Pin Pin Pin function Diagram No. Name 1 XTAL1 XTAL2 3 VDD 4 CLKSEL 4,5 5 RSTIN 6 IO_U 5 7 CGND www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. Pin No. VDD VDD VDD 10 VDD VDD 11 5/15 Technical Note Pin Pin function Diagram Name ...
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... BD8918F,BD8918FV,BD8919F,BD8919FV Pin No. Pin Name Pin function Diagram 12 12 VDDP 13 PRES 13 www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. Pin No. 14 VDD VDD 15 16 6/15 Technical Note Pin Name Pin function Diagram VDD OFFB VDD 15 CMDVCCB GND 2010.4 - Rev.D 14 VDD ...
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... BD8918F,BD8918FV,BD8919F,BD8919FV ●Package Package Name: SOP16 16 1 1.27 Package Name: SSOP-B16 www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 10 ± 0.2 (MAX 10.35 include BURR) BD891XF 8 1PIN MARK 0.4 ± 0.1 0.1 Fig. 3.1 SOP16 Package Dimension 5.0±0 D891X Lot No 1PIN MARK 0.1 0.65 0.22±0.1 Fig. 3.2 SSOP-B16 Package Dimension ...
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... BD8918F,BD8918FV,BD8919F,BD8919FV ●Function 1) Power supply Power supply pins are VDD and VDDP. Set VDD at the same voltage as the signal from the system controller side. VDDP and CGND are for the 5V power source and GND, respectively, on the card side. 2) Input voltage detector The IC remains in wait mode until the power on reset is released 16ms after the VDD supply voltage is increased over Vthd and the VDDP supply voltage is increased over Vthp, making the CMDVCCB signal turn from ...
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... BD8918F,BD8918FV,BD8919F,BD8919FV 3-3) Activation sequence When OFFB is in the “High” state and the CMDVCCB signal from the controller turns from the activation sequence starts to activate each functional block in the following order: The RST outputs signals based on the RSTIN input, being reset approximately 472sec after the CMDVCCB signal turns from The RSTIN input becomes effective approximately 48 ...
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... BD8918F,BD8918FV,BD8919F,BD8919FV 3-4) Deactivation sequence When the CMDVCCB input turns from the alarm signal (described later) is detected, the following deactivation sequence is initiated in the following order, transitioning to the wait mode. RST BUF OFF (RST: Lo) CLK BUF OFF (CLK: Lo) I/O TRANS OFF (I/O Bus on the controller side: Pull-up) ...
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... BD8918F,BD8918FV,BD8919F,BD8919FV 6) Card clock supply Card clock is supplied from the CLK pin dividing the input frequency of XTAL1 pin with the CLKSEL pin setting. The clock division switching time is within the 8 clocks of the XTAL1 signal. The input signal to the XTAL1 pin is made by a crystal oscillator (BD8918F/FV:8Hz, BD8919F/FV:16MHz) between the XTAL1 pin and XTAL2 pin or external pulse signal. When a crystal oscillator is used, the voltage between XTAL1 and XTAL2 may decrease to become close to “ ...
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... BD8918F,BD8918FV,BD8919F,BD8919FV ●An example of software control Start OFFB=H ? Yes (Card detect) CMDVCCB: H→L Activation start ↓ Regulator on (VCC) ↓ IO enable (IO) Card communication start RSTIN: L→H ↓ Complete CMDVCCB: L→H Deactivation start ↓ IO disable (IO) ↓ Regulator off (VCC) End www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. ...
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... Fig.8 CONTROLLER 0.1uF XTAL 1 GND 1 16 CMDVCCB 2 15 OFFB VDD 3 14 BD8918F/ CLKSEL PRES 4 13 BD8918FV RSTIN VDDP 5 12 VCC CGND CLK RST 8 9 1uF CARD CONNECTION 0. Fig ...
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... BD8918F,BD8918FV,BD8919F,BD8919FV BD8919F/FV application examples +3.3V (22pF) (22pF) ●Precautions for use 1) The capacitor for the VCC pin should be placed as close as possible to the IC between VCC and CGND so that the ESR becomes less than 100Ω 2) Connect a capacitor of over 0.1µF for VDD and over 10µF for VDDP as close as possible to the IC so that the ESR becomes less than 100m ...
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... BD8918F,BD8918FV,BD8919F,BD8919FV Ordering part number Part No. Part No. 8918 8919 SOP16 10 ± 0.2 (MAX 10.35 include BURR 0.4 ± 0.1 1.27 0.1 SSOP-B16 5.0±0 0.15±0.1 0.1 0.65 0.22±0.1 www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved Package F: SOP16 FV: SSOP-B16 <Tape and Reel information> ...
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