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FEDL5547-03 Semiconductor
FEDL5547-03 This version: May. 2000 MSM5547 Previous version: Nov. 1999
Semiconductor MSM5547
Digital Clock
GENERAL DESCRIPTION
MSM5547 is a clock IC having a wide power supply range with 4.194304 MHz original oscillation. MSM5547 is a 12 hour cycle AM/PM clock for a static fluorescent character display tube. Time correction is in hour, minute and 30 minute adjustments. Hour and minute are corrected by a 2 Hz fast-forward function. MSM5547 also has a contrast adjustment function for the fluorescent character display tube, which can set four levels of contrast, including 100% duty.
FEATURES
* 12 hour clock (AM/PM) * Applied for static fluorescent character display tube * Wide power supply range: 4 to 16V * 4.194304 MHz original oscillation * 4 levels of contrast can be selected * Package options: 44-pin plastic QFP (QFP44-P-910-0.80-L2) (Product name: MSM5547GS-L2)
BLOCK DIAGRAM
CMOS OSC OUT OSC IN TEST 1 TEST 2 TEST 3 VSS
Time adjustment
Oscillation
Frequency dividers
1 Hz
64 Hz 1 Hz a1 b1
VDD
Test adjustment
1 / 60 Decoder segment
VDD A/C SE ZA MS HS VSS DIM CONT 1 DIM CONT 2 DIM TEST 4 VSS VDD Contrast adjustment
(1 / 60)
Hour counter (1 / 12) AM PM
Decoder segment
Driver [PCH open drain]
Minute counter
g3 b4 c4 AM PM
VDD
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PIN CONFIGURATION (TOP VIEW)
37 TEST 2
34 AM
41 TEST 1
38 TEST 3
40 TEST 4
36 MS
43 PM
39 NC
35 HS
42 ZA
b4 33 f3 32 a3 31 b3 30 1 Hz 29 f2 28 a2, d2 27 b2 26 f1 25 a1 24 b1 23
A/C 22 OSC OUT 21 OSC IN 20 VSS 19 DIM CONT2 18 NC 17 DIM CONT1 16 VDD 15 SE 14 DIM 13 64 Hz 12
44 c4
1 g3 2 e3 3 d3 4 c3 5 g2 6 e2 7 c2 8 g1 9 e1 10 d1 11 c1
44-pin plastic QFP
(Model name indicated on actual product is M5547)
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ABSOLUTE MAXIMUM RATINGS
Parameter Power Supply Voltage Input Voltage Input Current P Channel Open Drain Output Pin Withstanding Voltage P Channel Open Drain Output Current Power Dissipation Storage Temperature Range Symbol VDD - VSS VI II VO IO PD TSTG -- Ta = 25C Condition Rating -0.3 to +18 VSS - 0.3 VI VDD + 0.3 10 VDD - 26 -10 200 -55 to +150 Unit V V mA V mA mW C
RECOMMENDED OPERATING CONDITIONS
Parameter Power Supply Voltage Operating Temperature Crystal Frequency Symbol VDD - VSS TOP f(x'tal) Condition -- -- -- Range 4 to 16 -30 to +85 4.194304 Unit V C MHz
ELECTRICAL CHARACTERISTICS
DC Characteristics
Parameter Input Voltage "1" level "0" level TEST 1 TEST 2 ZA, MS, HS, DIM DIM CONT1 "L" Input Current TEST 3, 4
"L" Input Current A/C "L" Input Current SE, DIM CONT2
(VDD = 6.0 V, VSS = 0 V, Ta = -30 to +85C) Symbol VIH VIL IIH1 Condition -- -- VI = VDD Min 4.3 -- 30 Typ -- -- -- Max -- 1.0 150 mA Unit V
"H" Input Current
IIL1 IIL2 IIL3 VOH VOL IOH1 IOL1 IOH2 IOL2 IOH3 IOL3 IDD
VI = VSS
-120 -3 -30
-- -- -- -- -- -- -- -- -- -- -- --
-800 -12 -150 -- 0.1 -- -1.0 -- -1.0 -- -- 2
mA
Output Voltage
"1" level (All output) "0" level (64 Hz output)
IOH = 0A IOL = 0A VOH = 4.0 V VOL = 0 V VOH = 4.0 V VOL = 0 V VOH = 5.5 V VOL = 0.5 V CIN = 39 pF 5% COUT = 33 pF 5% CI = 70 W 5% f(x'tal) = 4.194304 MHz No load
5.9 -- -2000 -- -1000 -- -100 100 --
V
Output Current Output Current Output Current
1 Hz, a2, d2, AM, PM output pins
Other segment output pins except above
mA mA mA mA
64 Hz output pin
Dynamic Operating Current
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FUNCTIONAL DESCRIPTION
Time Base *4.194304 MHz crystal oscillator *Internal crystal oscillation circuit (AMP, feedback resistance) 7 Segment Display Format
Display Device *4 digit static fluorescent character display tube (with AM, PM, colon) *Colon display blinks at 1 Hz with a 50% duty ratio *Relationship between Driver Outputs and DF Display Tube Relationship between Driver Output and DF Display Tobe
a3
a2 b3 1Hz f2 g2 c3 1Hz e2 d2 c2 e1 b2 f1
a1 b1 g1 c1 d1
AM
b4
f3 g3
PM
c4
e3 d3
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Contrast Selecting Function
Selector pin name DIM "0" (or open) "1" "1" "1" DIM CONT1 * "0" (or open) "0" (or open) "1" DIM CONT2 * "1" (or open) "0" "1" (or open) Operation mode 100% duty display 25% (1/4) duty display at 4096 Hz 12.5% (1/8) duty display at 4096 Hz 6.25% (1/16) duty display at 4096 Hz
"1": high level, "0": low level, *: don't care Display Mode * For 12 hour display, hour-minute 4-digit display Hour display: 1 to 12 Minute display: 0 to 59 * 0 at highest digit is not displayed. (Highest digit zero suppress function)
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FEDL5547-03 Semiconductor Time Correction Hour-minute fast-forward function * Hour or minute can be fast-forwarded individually. The HS (hours set) pin fast-forwards the hour digit and the MS (minutes set) pin forwards the minute digit at 2 Hz. * In open status, the HS and MS pins are held to "0" level by a pull-down resistor, and are in inactive status. These pins become active by being set to "1" level externally. * It takes 0.242 to 0.5 sec from when the HS and MS pins become active to when +1 is counted. After a +1 count, time is counted in 0.5 sec (2 Hz) units. * Hour digit and minute digits can be fast-forwarded in parallel. * To fast-forward hour digit, the lower counter continues normal operation but does not carry from minute to hour digit. * For fast-forwarding minute digit, the counter does not carry to the hour digit. The second digit continues normal operation but does not carry to the minute digit. Time Setting Function ( 30 minutes reset to zero) * In open status, the ZA (zero adjust) pin is held to "0" level by a pull-down resistor and is in inactive status. This pin becomes active and enables time setting by being set to "1" level externally. * Time is set at Min. 0.00 sec to Max. 0.0312 sec after the ZA pin becomes "1" level. * For time setting, minute and second digits are reset to 00' 00". The colon output starts with "1". If the minute digit is less than 30, minute and second digits are reset to 00'00" . The counters for seconds are reset up to 16 Hz. (Example of Setting) (X - 1) hour 30 minutes 00 seconds X hour 00 minutes 00 seconds X hour 29 minutes 59 seconds ~ ~ AE X hour 00 minutes 00 seconds MSM5547
X hour 30 minutes 00 seconds X hour 59 minutes 59 seconds (X + 1) hour 29 minutes 59 seconds ~ ~ AE (X + 1) hours 00 minutes 00 seconds
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SE (set enable) Pin In open status, the SE pin is held to "1" level by a pull-up resistor, enabling input from MS, HS and ZA pins. These inputs become invalid by setting this pin to "0" level externally.
A/C (all clear) Pin * In open status, the A/C pin is held to "1" level by a pull-up resistor, and is in inactive status. The time counter is set at 1 hour 00 minutes 00 seconds AM by setting this pin to "0" level externally. The counter for seconds is reset up to 16 Hz. * If a capacitor is connected between this pin and the Vss pin, 1 hour 00 minutes AM is displayed when power is turned on. Connect a capacitor of 4700 pF or more.
TEST Pin * In open status, TEST 1 and 2 pins are held to "0" level by a pull-down resistor. * In open status, TEST 3 and 4 pins are held to "1" level by a pull-up resistor. TEST Select Function 1
Selector pin name TEST1 "0" (or open) f (Pulse) "1" "1" f (Pulse) f (Pulse) TEST2 "0" (or open) "1" "f (Pulse) f (Pulse) "1" "0" (or open) TEST3 "1" (or open) "1" (or open) "1" (or open) "0" "0" "0" Normal function Input pulses to 16.384 KHz system of the circuit. Input pulses to 16.384 KHz system of the circuit. Input pulses to 64 Hz system of the circuit. Input pulses to 64 Hz system of the circuit. Input pulses to minute counter and hour counter, and advances 1 count with 1 pulse. (Do not carry hour and minute counters.) Operation mode
TEST Select Function 2
Selector pin name TEST4 "0" DIM f (Pulse) "0" DIM CONT1 DIM CONT2 * * Operation mode The pulse widths of the all segment outputs are controlled by the pulse width of DIM signal Sets all segment outputs to high impedance
* Indicates that input level can be "0" and "1".
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FEDL5547-03 Semiconductor 64 Hz Pin This is the output pin for oscillation frequency adjustment, which constantly outputs 64 Hz. Chattering Removal A chattering removal circuit is included on three input pins: MS, HS and ZA. Less than 31.25 msec chattering is neglected. MSM5547
Input wave form 31.25 msec or less 31.25 msec or less
Treatment of NC Pin Since the NC pin of 17 pin and 39 pin are connected to the substrate, set the pins to VDD voltage or to open status.
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PACKAGE DIMENSIONS
(Unit : mm)
QFP44-P-910-0.80-L2
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) 0.35 TYP. 3/Nov. 28, 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).
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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. 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. 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. 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. 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. 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. 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. No part of the contents contained herein may be reprinted or reproduced without our prior permission. MS-DOS is a registered trademark of Microsoft Corporation.
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Copyright 2000 Oki Electric Industry Co., Ltd.
Printed in Japan
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