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MITSUBISHI IC'S
M35501FP
FLD (VFD) DIGIT EXPANDER
DESCRIPTION
The M35501FP generates digit signals for fluorescent display when connected to the output port of a microcomputer. There are up to 16 digit pins available, and more can be added by connecting additional M35501FPs. The number of fluorescent displays can be increased easily by connecting the M35501FP to the CMOS FLD (VFD; Vacuum Fluorescent Display) output pins of an 8-bit microcomputer in MITSUBISHI's 38B5 Group. The M35501FP is suitable for fluorescent display control on household electric appliances, audio products, etc.
FEATURES
qDigit output ............................................................. 16 (maximum) *Up to 16 pins can be selected *More digits available by connecting additional M35501FPs *Output structure: high-breakdown voltage, P-channel opendrain; built-in pull-down resistor between digit output pins and VEE pin qPower-on reset circuit ........................................................ Built-in qPower source voltage ................................................ 4.0 to 5.5 V qPull-down power source voltage ................................ Vcc - 43 V qOperating temperature range ................................... -20 to 85 C qPackage ............................................................................. 24P2E qPower dissipation ............... 250W (at 100 kHz operation clock)
PIN CONFIGURATION (TOP VIEW)
24
23
22
21
20
19
18
17
16
15
14
13
M35501FP
1
2
3
4
5
6
7
8
9
10
11
12
SEL
RESET
OVFIN
DIG15
DIG14
CLK
Outline: 24P2E-A 24-pin plastic-molded SSOP
Fig. 1 Pin configuration of M35501FP
OVFOUT
DIG13
DIG12
DIG11
VSS
VCC
DIG10
DIG0
DIG6
DIG5
DIG7
DIG2
DIG8
DIG1
DIG3
DIG4
DIG9
VEE

MITSUBISHI IC'S
M35501FP
FLD (VFD) DIGIT EXPANDER
FUNCTIONAL BLOCK
DIG15 DIG14 DIG13 DIG12 DIG11 DIG10 DIG9 DIG8 DIG7 DIG6 DIG5 DIG4 DIG3 DIG2 DIG1 DIG0
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24 VEE
OVFOUT 7 OVFIN 6 VCC VSS 3 1 Power-on reset Optional digit counter
Shift register
RESET 4
5 2 CLK SEL
Fig. 2 Functional block diagram
PIN DESCRIPTION
Table 1 Pin description Pin VCC, VSS RESET CLK SEL OVFIN Name Power source input Reset input Clock input Select input Overflow signal input Function Apply 4.0-5.5 V to Vcc, and 0V to Vss. Reset internal shift register (built-in power-on reset circuit). Digit output varies according to rising edge of clock input. Use when specifying the number of digits. Input "H" when using one M35501FP. Connect to OVFOUT pin of additional M35501FPs when using multiple M35501FPs (to use 17 digits or more). Leave open when using one M35501FP. Connect to OVFIN pin of additional M35501FPs when using multiple M35501FPs (to use 17 digits or more). Output the digit output waveform of fluorescent display. Leave open when not in use (VEE level output). Apply voltage to DIG0-DIG15 pull-down resistors. Output Structure - CMOS input level Built-in pull-up resistor CMOS input level Built-in pull-down resistor CMOS input level Built-in pull-down resistor CMOS input level Fig. No. - 3 2 2 4
OVFOUT
Overflow signal output
CMOS output
5
DIG15- DIG0 VEE
Digit output
Pull-down power source input
High-breakdown-voltage P-channel open-drain output Built-in pull-down resistor -
1
-
2
MITSUBISHI IC'S
M35501FP
FLD (VFD) DIGIT EXPANDER
PORT BLOCK
(1) DIG0-DIG15
(2) SEL, CLK
Shift register
Pull-down transistor
VEE
(3) RESET
(4) OVFIN
Pull-up transistor
(5) OVFOUT
Shift register
Fig. 3 Port block diagram
3
MITSUBISHI IC'S
M35501FP
FLD (VFD) DIGIT EXPANDER
USAGE
Three usages of the M35501FP are described below.
(1) 16-Digit Mode: 16 digits selected
The number of digits is set to 16 by fixing the OVFIN pin to "H" and the SEL pin to "L." Figure 5 shows the output waveform.
(2) Optional Digit Mode: 1-16 digits selectable
When the number of CLK pin rising edges during an "H" period of the SEL pin is n and the OVFIN pin is fixed to "H," the number of digits set is n. If n is 16 or more, all 16 digits are set. Figure 6 shows the output waveform.
SEL pin
n
CLK pin
Fig. 4 Digit setting
(3) Cascade Mode: 17 digits or more selectable
17 digits or more can be used by connecting two M35501FPs or more. Figure 7 shows an example using three M35501FPs, offering 33 to 48 digit outputs. Cascade mode will not operate if all M35501FPs are in 16-digit mode (SEL = "L"). Use the most significant M35501FP in the optional digit mode for DIG output. Figure 8 shows the output waveform.
4
MITSUBISHI IC'S
M35501FP
FLD (VFD) DIGIT EXPANDER
DIGIT OUTPUT WAVEFORM
SEL CLK DIG0 DIG1 DIG2
"L"
DIG13 DIG14 DIG15 OVFOUT
Fig. 5 16-digit mode output waveform
RESET SEL CLK DIG0 DIG1 DIG2 DIG3 DIG4 DIG15
"L"
"L"
OVFOUT
Fig. 6 Optional digit mode output waveform
5
MITSUBISHI IC'S
M35501FP
FLD (VFD) DIGIT EXPANDER
OVFIN(1) RESET CLK RESET CLK SEL OVFOUT(1) OVFIN(2) RESET CLK SEL DIG30 DIG31 OVFOUT(2) OVFIN(3) RESET CLK SEL OVFOUT(3) DIG46 DIG47 DIG32 DIG33 DIG16 DIG17 DIG14 DIG15 DIG0 DIG1
Select signal
Fig. 7 Cascade mode connection example: 17 digits or more selected
CLK RESET
DIG0 DIG1 DIG2 DIG15 OVFOUT(1) DIG16 DIG17 DIG31 OVFOUT(2)
Fig. 8 Cascade mode output waveform
6
MITSUBISHI IC'S
M35501FP
FLD (VFD) DIGIT EXPANDER
The number of fluorescent displays can be increased by connecting the M35501FP to the CMOS FLD output pins on a 38B5 Group microcomputer.
Segment (high-breakdown-voltage: 36 pins + CMOS: 4 pins) (1 pin used as CLK.)
P27-P20
M38B5X
P07-P00 P17-P10 P37-P30
Fluorescent Display (FLD)
P84
P83-P80
SEL
M35501
CLK
Digits DIG0-DIG15
Fig. 9 Connection example with 38B5 Group microcomputer (1 to 16 digits) This FLD controller can control up to 32 digits using the 32 timing mode of the 38B5 Group microcomputer.
Segment (high-breakdown-voltage: 36 pins + CMOS: 4 pins) (1 pin is used as CLK.)
P27-P20
M38B5X
P07-P00 P17-P10 P37-P30 P83-P80
Fluorescent Display (FLD)
P84 SEL
M35501
CLK OVFOUT OVFIN Digits DIG0-DIG15
OVFIN OVFOUT SEL
Digits DIG16-DIG31
M35501
CLK
Fig. 10 Connection example with 38B5 Group microcomputer (17 to 32 digits)
7
MITSUBISHI IC'S
M35501FP
FLD (VFD) DIGIT EXPANDER
RESET CIRCUIT
To reset the controller, the RESET pin should be held at "L" for 2 s or more. Reset is released when the RESET pin is returned to "H" and the power source voltage is between 4.0 V and 5.5 V.
Notes1: Perform the reset release when CLK input signal is "L." 2: When setting the number of digits by SEL signal, optional digit counter is set to "0" by reset.
RESET CLK DIG0 DIG1 DIG2 DIG3
Fig. 11 Digit output waveform when reset signal is input
8
MITSUBISHI IC'S
M35501FP
FLD (VFD) DIGIT EXPANDER
POWER-ON RESET
Reset can be performed automatically during power on (power-on reset) by the built-in power-on reset circuit. When using this circuit, set 100 s or less for the period in which it takes to reach minimum operation guaranteed voltage from reset.
If the rising time exceeds 100 s, connect the capacitor between the RESET pin and VSS at the shortest distance. Consequently, the RESET pin should be held at "L" until the minimum operation guaranteed voltage is reached.
VDD Pull-up transistor
Power-on reset circuit output voltage
RESET pin
Power-on reset circuit
Reset state
(Note) Internal reset signal
Note:
This symbol represents a parasitic diode. Applied voltage to the RESET pin must be VDD or less. Power-on Reset released
Fig. 12 Power-on reset circuit
9
MITSUBISHI IC'S
M35501FP
FLD (VFD) DIGIT EXPANDER
ABSOLUTE MAXIMUM RATINGS Symbol VCC VEE VI VI VO VO Pd Topr Tstg Parameter Power source voltage Pull-down power source voltage Input voltage CLK, SEL, OVFIN Input voltage RESET Output voltage DIG0-DIG15 Output voltage OVFOUT Power dissipation Operating temperature Storage temperature Conditions *All voltages are based on VSS. *Output transistors are off. Ratings -0.3 to 7.0 VCC -45 to VCC +0.3 -0.3 to VCC +0.3 -0.3 to VCC +0.3 VCC -45 to VCC +0.3 -0.3 to VCC +0.3 250 -20 to 85 -40 to 125 Unit V V V V V V mW C C
Ta = 25 C
RECOMMENDED OPERATING CONDITIONS (VCC = 4.0 to 5.5 V, Ta = -20 to 85 C, unless otherwise noted) Symbol VCC VSS VEE VIH VIH VIL VIL Parameter Power source voltage Power source voltage Pull-down power source voltage "H" input voltage CLK, SEL, OVFIN "H" input voltage RESET "L" input voltage CLK, SEL, OVFIN "L" input voltage RESET Min. 4.0 VCC -43 0.8VCC 0.8VCC 0 0 Limits Typ. 5.0 0 VSS VCC VCC 0.2VCC 0.2VCC Max. 5.5 Unit V V V V V V V
RECOMMENDED OPERATING CONDITIONS (VCC = 4.0 to 5.5 V, Ta = -20 to 85 C, unless otherwise noted) Symbol IOH(peak) IOH(peak) IOL(peak) IOH(avg) IOH(avg) IOL(avg) CLK Parameter "H" peak output current DIG0 - DIG15 (Note 1) "H" peak output current OVFOUT (Note 1) "L" peak output current OVFOUT (Note 1) "H" average current DIG0 - DIG15 (Note 2) "H" average current OVFOUT (Note 2) "L" average current OVFOUT (Note 2) Clock input frequency Limits Min. Typ. Max. -36 -10 10 -18 -5.0 5.0 2 Unit mA mA mA mA mA mA MHz
Notes 1: The peak output current is the peak current flowing in each port. 2: The average output current is an average value measured over 100 ms.
10
MITSUBISHI IC'S
M35501FP
FLD (VFD) DIGIT EXPANDER
ELECTRICAL CHARACTERISTICS (VCC = 4.0 to 5.5 V, Ta = -20 to 85 C, unless otherwise noted) Symbol VOH VOH VOL VT+ -- VT- IIH IIH IIL IIL ILOAD Parameter "H" output voltage "H" output voltage "L" output voltage Hysteresis "H" input current "H" input current "L" input current "L" input current Output load current DIG output DIG0-DIG15 OVFOUT OVFOUT CLK, OVFIN RESET OVFIN RESET CLK, SEL OVFIN CLK, SEL RESET DIG0 - DIG15 Test conditions IOH = -18 mA IOH = -10 mA IOL = 10 mA VCC = 5.0 V VI = VCC VI = VCC VCC = 5.0 V VI = VSS VI = VSS VCC = 5.0 V VEE = VCC -43 V VOL = VCC Output transistors are off. VEE = VCC -43 V VOL = VCC -43 V Output transistors are off. 30 70 Min. VCC -2.0 VCC -2.0 2.0 0.4 5.0 140 -5.0 -60 500 -130 650 -185 800 Limits Typ. Max. Unit V V V V A A A A A
ILEAK
Output leakage current
DIG0-DIG15
-10
A
ICC
Power source
VCC = 5.0 V, CLK = 100 kHz Output transistors are off.
50
A
11
MITSUBISHI IC'S
M35501FP
FLD (VFD) DIGIT EXPANDER
TIMING REQUIREMENTS (VCC = 4.0 to 5.5 V, Ta = -20 to 85 C, unless otherwise noted) Symbol tw(RESET) tc(CLK) twH(CLK) twL(CLK) tsu(SEL) th(SEL) th(CLK) Reset input "L" pulse width Clock input cycle time Clock input "H" pulse width Clock input "L" pulse width Select input setup time Select input hold time Clock input setup time Parameter Limits Min. 2 500 200 200 500 500 500 Typ. Max. Unit
s ns ns ns ns ns ns
vcc RESET vss
0.2VCC
tw(RESET) 0.8VCC
tc(CLK) twL(CLK) twH(CLK) 0.8VCC
vcc CLK vss
0.2VCC
vcc SEL CLK vss vcc vss
tsu(SEL) th(SEL) th(CLK)
Fig. 13 Timing diagram
12
Keep safety first in your circuit designs!
* Mitsubishi Electric Corporation puts the maximum effort into making semiconductor products better and more reliable, but there is always the possibility that trouble may occur with them. Trouble with semiconductors may lead to personal injury, fire or property damage. Remember to give due consideration to safety when making your circuit designs, with appropriate measures such as (i) placement of substitutive, auxiliary circuits, (ii) use of non-flammable material or (iii) prevention against any malfunction or mishap.
Notes regarding these materials
* * * These materials are intended as a reference to assist our customers in the selection of the Mitsubishi semiconductor product best suited to the customer's application; they do not convey any license under any intellectual property rights, or any other rights, belonging to Mitsubishi Electric Corporation or a third party. Mitsubishi Electric Corporation assumes no responsibility for any damage, or infringement of any third-party's rights, originating in the use of any product data, diagrams, charts or circuit application examples contained in these materials. All information contained in these materials, including product data, diagrams and charts, represent information on products at the time of publication of these materials, and are subject to change by Mitsubishi Electric Corporation without notice due to product improvements or other reasons. It is therefore recommended that customers contact Mitsubishi Electric Corporation or an authorized Mitsubishi Semiconductor product distributor for the latest product information before purchasing a product listed herein. Mitsubishi Electric Corporation semiconductors are not designed or manufactured for use in a device or system that is used under circumstances in which human life is potentially at stake. Please contact Mitsubishi Electric Corporation or an authorized Mitsubishi Semiconductor product distributor when considering the use of a product contained herein for any specific purposes, such as apparatus or systems for transportation, vehicular, medical, aerospace, nuclear, or undersea repeater use. The prior written approval of Mitsubishi Electric Corporation is necessary to reprint or reproduce in whole or in part these materials. If these products or technologies are subject to the Japanese export control restrictions, they must be exported under a license from the Japanese government and cannot be imported into a country other than the approved destination. Any diversion or reexport contrary to the export control laws and regulations of Japan and/or the country of destination is prohibited. Please contact Mitsubishi Electric Corporation or an authorized Mitsubishi Semiconductor product distributor for further details on these materials or the products contained therein.
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(c) 1998 MITSUBISHI ELECTRIC CORP. New publication, effective Feb. 1998. Specifications subject to change without notice.
REVISION DESCRIPTION LIST
Rev. No. 1.0 First Edition Revision Description
M35501FP DATA SHEET
Rev. date 980216
(1/1)

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