FEDL1210-03 FEDL1210-03 This version: May. 2000 MSC1210 Previous version: Jan. 1998 ¡ Semiconductor ¡ Semiconductor MSC1210 Clock For 1/2 Duty VFD GENERAL DESCRIPTION The MSC1210 is a clock for use in 1/2 duty VFD applications, featuring 4.194304 MHz crystal controlled oscillator time base, wide ranges of power supply, and 12-hour format. The clock correction rages are minutes, hours, and a 30-min ADJ (30-minute adjustment). The two clock correction modes are available; one is 1Push-1ADJ correction mode, the other is 2 Hz fast advance correction mode. The MSC1210 is also provided with a function of 4-degree-switchable VFD luminance adjustment. FEATURES • 12-hour format • Wide ranges of power supply: 4 V to 18 V (Built-in constant-voltage circuit) • Usable for 1/2 Duty VFD • 4.194304 MHz (crystal oscillation) • Luminance: Switchable among 4 degrees • Package options: 32-pin plastic SSOP (SSOP32-P-430-1.00-K) (Product name: MSC1210GS-K) 30-pin plastic shrink DIP (SDIP30-P-400-1.778) (Product name: MSC1210SS) BLOCK DIAGRAM VDD 64 Hz VDD VCC VSS FREQUENCY DIVIDER 1/60 VDD A/C VDD ZA HS MS DIM2 DIM1 BLANK CLOCK ADJUSTMENT TEST MINUTE COUNTER HOUR COUNTER 1a, 3a 1b, 3b OUTPUT DRIVER XT VDD OSCILLATOR SEGMENT DECODER XT VCC CONSTANT VOLTAGE CIRCUIT 1f, 3f 1g, 3g 2a, 2d 2b, 4b, 4c 2c, col 2f 2g 2c, col' LUMINANCE ADJUSTMENT GRID DECODER GR1 GR2 1/11 FEDL1210-03 ¡ Semiconductor MSC1210 PIN CONFIGURATION (TOP VIEW) GR2 1 32 GR1 VCC 2 31 2a, 2d VDD 3 30 2b, 4b, 4c 64 Hz 4 29 NC TEST 5 28 2f BLANK 6 27 2c, col * DIM1 7 26 2c, col' * DIM2 8 25 2e XT 9 24 2g XT 10 23 1d, 3d VSS 11 22 1e, 3e A/C 12 21 1c, 3c NC 13 20 1g, 3g ZA 14 19 1f, 3f HS 15 18 1b, 3b MS 16 17 1a, 3a 32-Pin Plastic SSOP * col indicates a blink colon and col' indicates a light colon. 2/11 FEDL1210-03 ¡ Semiconductor MSC1210 GR2 1 30 GR1 VCC 2 29 2a, 2d VDD 3 28 2b, 4b, 4c 64 Hz 4 27 2f TEST 5 26 2c, col * BLANK 6 25 2c, col' * DIM1 7 24 2e DIM2 8 23 2g XT 9 22 1d, 3d XT 10 21 1e, 3e VSS 11 20 1c, 3c A/C 12 19 1g, 3g ZA 13 18 1f, 3f HS 14 17 1b, 3b MS 15 16 1a, 3a 30-Pin Plastic Shrink DIP * col indicates a blink colon and col' indicates a continuous light colon. 3/11 FEDL1210-03 ¡ Semiconductor MSC1210 PIN DESCRIPTION Symbol Description Type DIM1 I DIM2 I Luminance switchover pins When this pin "0", the internal circuit is reset. A/C I The reset pulse width should be more than 2ms. This pin is internally connected to a pull-up resistor. ZA I HS I MS I BLANK I XT I/O XT Zero adjustment pin. This pin is internally connected to a pull-up resistor Hour adjustment pin. This pin is internally connected to a pull-up resistor Minute adjustment pin. This pin is internally connected to a pull-up resistor Blank input pin. When this pin is "0", the display disappears. This pin is internally connected to a pull-down resistor. These pins are used for crystal oscillation. TEST I This pin is used to test the IC. 64 Hz O 64 Hz signal output pin for oscillation frequency adjustment O Grid output pins for 1/2 duty VFD O Anode output pins for 1/2 duty VFD GR1 GR2 1a, 3a to 2b, 4b, 4c ABSOLUTE MAXIMUM RATINGS Parameter Symbol Condition Rating Unit Supply voltage VCC – VSS VI Ta = 25°C –0.3 to +24 Ta = 25°C –0.3 to VCC + 0.3 Output voltage VO Ta = 25°C –0.3 to VCC + 0.3 V V V Power dissipation PD Ta = 25°C 200 mW TSTG — –55 to +150 °C Range Unit V °C MHz Input voltage Storage temperature RECOMMENDED OPERATING CONDITIONS Parameter Supply voltage Operating temperature Crystal frequency Symbol Condition VCC – VSS — 4 to 18 Top — –40 to +85 f (X'tal) — 4.194304 4/11 FEDL1210-03 ¡ Semiconductor MSC1210 ELECTRICAL CHARACTERISTICS DC Characteristics Parameter Applicable pin Symbol Condition (Ta = –40 to +85°C) Rating Unit Min. Max. "H" input voltage VIH VCC = 18 to 8 V 3.6 — V "L" input voltage VIL VCC = 18 to 8 V — 1 V IIL1 VCC = 18 V VIN = 0 V VCC = 18 V VIN = 5 V / 0 V VCC = 18 V VIN = 0 V VCC = 18 V VIN = 5 V VCC = 12 V VOH = 11.3 V VCC = 12 V VOL = 0.7 V VCC = 12 V VOH = 11.3 V VCC = 12 V VOL = 0.7 V VCC = 12 V VOH = 4 V VCC = 12 V VOL = 0.5 V –1 — µA –3 +3 µA –200 –50 µA 50 200 µA — –1 mA 15 — µA — –15 mA 15 — µA — –100 100 — — 1.0 Input current 1 Input current 2 Input current 3 Input current 4 DIM1, DIM2 BLANK, TEST XT ZA, HS, MS, A/C DIM1, DIM2 BLANK, TEST SEGMENT IIH2 IIL2 IIL3 IIH3 IOH1 IOL1 GRID1, GRID2 IOH2 Output current IOL2 64 Hz IOH3 IOL3 Dynamic current consumption ICC f = 4.19 MHz Cg, Cd = 22 pF VCC = 12 V µA mA 5/11 FEDL1210-03 ¡ Semiconductor MSC1210 EXPLANATION OF FUNCTIONS • Time Base Built-in 4.194304 MHz crystal oscillator circuit (AMP, feedback resistor) • 7 Segment Display • Display Device Dynamic drive 4-digit fluorescent display (with colons) • Relationship between Amode & Grid Outputs and VF display Tube RELATIONSHIP BETWEEN ANODE & GRID OUTPUTS AND VF DISPLAY TUBE GR2 GR1 3a 4b 3f 2a 3b col or col' 2f 3g 4c 3e 1a 2b 1f 2g 3c col or col' 3d 2e 1b 1g 2c 1e 2d 1c 1d • Luminance Switch Function 4-degree switchable luminance (frequency = 250 Hz, gap width between GR1 and GR2 = 30 µs) Switch pin name Operation mode DIM1 DIM2 L L f = 250 Hz 1/2 Duty (50% display) H L (25% display) L H (12.5% display) H H (6.25% display) 6/11 FEDL1210-03 ¡ Semiconductor MSC1210 • Display Mode 4-digit display of hours/minutes on a 12-hour format. Hours display ............. between 1 and 12 Minutes display .......... between 00 and 59 The most significant digit will not appear if it is zero. (Most significant digit zero suppress mechanism) • Correcting Clock Hour/minute fast advance function. Hour digits and minute digits can fast advance, separately. The hour digit can fast advance via HS pin (Hour Set), and the minute digit via MS pin (Minute Set) with 2 Hz period. The hour counter or minute counter is incremented by 1 each time of pressing. If keeping it depressed, these counters are incremented continuously with 2 Hz intervals. The HS and MS pins, when they are open, are kept at "1" level with a pull-up resistor, and become non-active. These pins become active when "0" level voltage is supplied from the external source. The hour digit and minute digit can fast advance simultaneously. In doing the fast advance operation, the low order digit of the counter continues a normal operation, but a carry out of the minute digit into the hour digit does not occur. In doing the minute digit fast advance, a carry into the hour digit does not occur. • Zero Adjust Function (±30 minutes Zero Reset) The ZA pin (Zero Adjust), when it is open, is kept at "1" level thith a pull-up resisitor, and becomes non-active. This pin becomes active when "0" level voltage is supplied from the external source in order to execute Zero Adjust operation. If the minute digits are smaller than 30, the minute digits and second digits are reset to 00'00". If the minute digits are larger than 30, the minute digits and second digits are reset to 00'00", and a carry into the hour digit is executed. Pre-second resetting of the counter is performed up to 16 Hz. (Zero Adjust Example) (X – 1) (hour) 30'00" X (hour) 00'00" X (hour) 29'59" X (hour) 00'00" X (hour) 30'00" X (hour) 59'59" (X + 1) (hour) 29'59" (X + 1) (hour) 00'00" 7/11 FEDL1210-03 ¡ Semiconductor MSC1210 • Blanking of Display The display is blanked by externally applying "0" level voltage to BLANK pin. • 64 Hz Pin Output pin for oscillation frequency adjustment. This pin always outputs a frequency of 64 Hz. • Constant-Voltage Circuit The constant-voltagae circuit supplys the logic section with a voltage down to between 3.4 V and 5 V from between 4 V and 18 V. • Power On Reset No external capacitor is needed since the IC contains a capacitor. • Test Pin Used to test the IC. • Removal of Chattering The MS, HS, and ZA input pins contains a chattering removal circuit, so that chattering of less than 31.25 msec is removable inside of the IC. 8/11 FEDL1210-03 ¡ Semiconductor MSC1210 PACKAGE DIMENSIONS (Unit : mm) SSOP32-P-430-1.00-K Mirror finish Oki Electric Industry Co., Ltd. Package material Lead frame material Pin treatment Package weight (g) Rev. No./Last Revised Epoxy resin 42 alloy Solder plating (≥5 mm) 0.60 TYP. 3/Dec. 5, 1996 Notes for Mounting the Surface Mount Type Package The SOP, QFP, TSOP, TQFP, LQFP, SOJ, QFJ (PLCC), SHP, and BGA are surface mount type packages, which 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 on the product name, package name, pin number, package code and desired mounting conditions (reflow method, temperature and times). 9/11 FEDL1210-03 ¡ Semiconductor MSC1210 (Unit : mm) SDIP30-P-400-1.778 Oki Electric Industry Co., Ltd. Package material Lead frame material Pin treatment Package weight (g) Rev. No./Last Revised Epoxy resin 42 alloy Solder plating (≥5 mm) 1.80 TYP. 2/Dec. 11, 1996 10/11 FEDL1210-03 ¡ Semiconductor MSC1210 NOTICE 1. The information contained herein can change without notice owing to product and/or technical improvements. Before using the product, please make sure that the information being referred to is up-to-date. 2. The outline of action and examples for application circuits described herein have been chosen as an explanation for the standard action and performance of the product. When planning to use the product, please ensure that the external conditions are reflected in the actual circuit, assembly, and program designs. 3. When designing your product, please use our product below the specified maximum ratings and within the specified operating ranges including, but not limited to, operating voltage, power dissipation, and operating temperature. 4. Oki assumes no responsibility or liability whatsoever for any failure or unusual or unexpected operation resulting from misuse, neglect, improper installation, repair, alteration or accident, improper handling, or unusual physical or electrical stress including, but not limited to, exposure to parameters beyond the specified maximum ratings or operation outside the specified operating range. 5. Neither indemnity against nor license of a third party’s industrial and intellectual property right, etc. is granted by us in connection with the use of the product and/or the information and drawings contained herein. No responsibility is assumed by us for any infringement of a third party’s right which may result from the use thereof. 6. The products listed in this document are intended for use in general electronics equipment for commercial applications (e.g., office automation, communication equipment, measurement equipment, consumer electronics, etc.). These products are not authorized for use in any system or application that requires special or enhanced quality and reliability characteristics nor in any system or application where the failure of such system or application may result in the loss or damage of property, or death or injury to humans. Such applications include, but are not limited to, traffic and automotive equipment, safety devices, aerospace equipment, nuclear power control, medical equipment, and life-support systems. 7. Certain products in this document may need government approval before they can be exported to particular countries. 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. 8. No part of the contents contained herein may be reprinted or reproduced without our prior permission. 9. MS-DOS is a registered trademark of Microsoft Corporation. Copyright 2000 Oki Electric Industry Co., Ltd. Printed in Japan 11/11