ml9270 Oki Semiconductor, ml9270 Datasheet

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ml9270

Manufacturer Part Number
ml9270
Description
33-segment Vfd Driver
Manufacturer
Oki Semiconductor
Datasheet

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Part Number:
ml9270-XX
Manufacturer:
OKI
Quantity:
5 000
.
GENERAL DESCRIPTION
The ML9270A-xx is a monolithic IC designed for directly driving the anode of the vacuum fluorescent display
tube.The device contains a 34-bit shift register circuit, 33-bit latch circuit, PLA (33*33 Matrix) and 33-output
circuit on a single chip.
Display data is serially stored in the shift register at the rising edge of a CLOCK pulse.
Setting the BLANK_BAR pin low allows all the driver outputs to be driven low, which makes it possible to set the
display blanking.
It is possible to use this device as “Self Load” by connecting DATA with LOAD ENABLE
FEATURES
• Logic power supply (V
• VFD tube drive power supply (V
• VFD driver output can be connected directly to the VFD tube. No pull-down resistor is required.
• VFD driver output current
• Data transfer speed
• Package
• Built-in power on reset circuit
BLOCK DIAGRAM
ML9270A-xx
33-Segment VFD Driver
· Segment driver (OUTPUT1 to 13)
· Segment driver (OUTPUT14 to 21) : –1.5 mA (V
· Segment driver (OUTPUT22 to 33) : –6.0 mA (V
LOAD ENABLE
BLANK_BAR
DATA OUT
CLOCK
DATA
GND
V
V
DISP
DD
Semiconductor
< P.O.R >
DD
)
V
DD
DISP
Shift Register
R
< 34 bit >
) : 8 to 18 V
: 3.3 V10% or 5.0 V10%
: –6.0 mA (V
: 5.0MHz
: 44-pin plastic QFP (QFP44-P-910-0.80-2K)
SI
PO-32
PO-33
PO-34
PO-1
PO-2
C
D-1
D-2
D-32 O-32
D-33 O-33
Display data
< 33 bit >
DISP
DISP
DISP
Latch
C
= 9.5V)
= 9.5V)
= 9.5V)
O-1
O-2
33x33 Matrix
< PLA >
Preliminary
Issue Date: Mar. 28, 2006
PEDL9270A-01
OUTPUT2
OUTPUT32
OUTPUT1
OUTPUT33
1/13

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ml9270 Summary of contents

Page 1

... VFD Driver . GENERAL DESCRIPTION The ML9270A- monolithic IC designed for directly driving the anode of the vacuum fluorescent display tube.The device contains a 34-bit shift register circuit, 33-bit latch circuit, PLA (33*33 Matrix) and 33-output circuit on a single chip. Display data is serially stored in the shift register at the rising edge of a CLOCK pulse. ...

Page 2

... OKI Semiconductor PIN CONFIGURATION (TOP VIEW) OUTPUT13 1 OUTPUT14 2 OUTPUT15 3 OUTPUT16 4 OUTPUT17 OUTPUT18 7 OUTPUT19 8 OUTPUT20 9 OUTPUT21 10 OUTPUT22 11 PEDL9270A-01 ML9270A-xx 33 OUTPUT2 32 OUTPUT1 31 CLOCK 30 DATA V 29 DISP BLANK_BAR 27 GND 26 LOAD ENABLE 25 24 DATA OUT 23 OUTPUT33 2/13 ...

Page 3

... Shift register clock input pin. Micro- Shift register reads data through DATA while the CLOCK pin Controller is low state and the data in the shift register is shifted from one stage to the next stage at the rising edge of the CLOCK. PEDL9270A-01 ML9270A-xx Description > –1.5 mA > –6 applied. 3/13 ...

Page 4

... O2 I DATA OUT O3 Condition When the power supply voltage is 5.0 V (typ When the power supply voltage is 3.3 V (typ.) — DISP — f CLK — Ta PEDL9270A-01 ML9270A-xx Rating Unit –0.3 to +6.5 V –0.3 to +25 V –0 +0 –0 +0 –0 +0.3 V DISP – ...

Page 5

... Input Data = ”1”0”1”.. 3.3 V  Input Data = ”1”0”1”.. Input Data = ”1”0”1”.. V DISP No Operation Typ 25°C V Max.:Ta = 85°C DISP PEDL9270A-01 ML9270A-xx Min. Typ. Max. Unit — — 0 — — 0 — — 0 — ...

Page 6

... F t Mounted in a unit PRZ Mounted in a unit, t POF V = 0.0 V DISP — t RSOFF = 3.3 V 10 0 0 POF PEDL9270A-01 ML9270A-xx Min. Typ. Max. Unit — — 100 — — 50 — — 50 — — 50 — — 50 — — 400 — — ...

Page 7

... OKI Semiconductor TIMING DIAGRAMS Symbol 3.3 V 10% = 5.0 V 10 0 0 0.2 V 0.8 V DISP DISP DISP 0 0 PEDL9270A-01 ML9270A- 0.2 V DISP / 0 7/13 ...

Page 8

... OKI Semiconductor FUNCTIONAL DESCRIPTION General Description The ML9270A is a CMOS multi-digit display driver and consists of a 34-bit shift register, a 33-bit latch, and a 33-bit VF tube driver. Pin Description (1) DATA This is a serial data input terminal of the 34-stage shift register. (2) CLOCK This is a Clock input terminal of the shift resister to shift an input signal at its leading edge. ...

Page 9

... DISP DISP DATA OUTPUT1 CLOCK | OUTPUT33 BLANK_BAR LOAD ENABLE DATA OUT GND PEDL9270A-01 ML9270A- DATA OUT To vacuum fluorescent display tube 9/13 ...

Page 10

... OKI Semiconductor POWER-ON/OFF TIMING [Voltage] V >2. prevent IC from malfunctioning, after V When turning off the power, after V is applied as soon as possible that applied as soon as possible that V DISP PEDL9270A-01 ML9270A-xx V Terminal Voltage DISP V Terminal Voltage DD [Time] is applied. DISP is applied. DD 10/13 ...

Page 11

... The surface mount type packages are very susceptible to heat in reflow mounting and humidity absorbed in storage. Therefore, before you perform reflow mounting, contact Oki’s responsible sales person for the product name, package name, pin number, package code and desired mounting conditions (reflow method, temperature and times). PEDL9270A-01 ML9270A-xx (Unit: mm) 11/13 ...

Page 12

... OKI Semiconductor REVISION HISTORY Document No. Date PEDL9270A-01 Mar. 28, 2006 Page Previous Current Edition Edition – – Preliminary edition 1 PEDL9270A-01 ML9270A-xx Description 12/13 ...

Page 13

... The purchaser assumes the responsibility of determining the legality of export of these products and will take appropriate and necessary steps at their own expense for these part of the contents contained herein may be reprinted or reproduced without our prior permission. PEDL9270A-01 ML9270A-xx Copyright 2006 Oki Electric Industry Co., Ltd. 13/13 ...

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