INTEGRATED CIRCUITS DATA SHEET PCF1172C 31/2-digit LCD car clock Product specification Supersedes data of September 1993 File under Integrated Circuits, IC16 1997 Apr 16 Philips Semiconductors Product specification 31/2-digit LCD car clock PCF1172C FEATURES • Driving standard indicators GENERAL DESCRIPTION 31⁄ 2-digit LCD with AM and PM The PCF1172C is a single chip, 4.19 MHz CMOS clock circuit indicating hours and minutes. It is designed to drive a 31⁄2-digit liquid crystal display (LCD) with AM and PM indicators. • Internal voltage regulator for 5 V LCD • Option for external stabilized voltage supply Two external single-pole, single-throw switches will accomplish all time setting functions. The circuit is battery-operated via an internal 5 V voltage regulator or by an external stabilized voltage supply. • 4.19 MHz oscillator • Integrated oscillator output capacitor and polarization resistor • Operating ambient temperature: −40 to +85 °C • 40-lead plastic SMD, face down (VSO40). ORDERING INFORMATION TYPE NUMBER PACKAGE NAME PCF1172CT VSO40 PCF1172CU − DESCRIPTION plastic very small outline package; 40 leads; face uncased chip in VERSION down(1) Notes 1. See Fig.1 and Chapter “Package outline” for pin layout and package details. 2. See Chapter “Chip dimensions and bonding pad locations” for pad layout and package details. 1997 Apr 16 SOT158-2 − tray(2) 2 Philips Semiconductors Product specification 31/2-digit LCD car clock PCF1172C PINNING SYMBOL PIN SYMBOL DESCRIPTION PIN DESCRIPTION OSC OUT 1 oscillator output TR 38 test reset; connect to (VDD) OSC IN 2 oscillator input TS 39 test speed-up; connect to (VDD) S1 3 set hour (VDD) 40 S3 4 ±2 minute correction positive supply for test and oscillator inputs BP 5 64 Hz backplane driver (common of LCD) PM 6 segment output for PM annunciator AM 7 segment output for AM annunciator E2 8 segment driver D2 9 segment driver C2 10 segment driver E3 11 segment driver D3 12 C3 OSC OUT 1 40 (V DD ) OSC IN 2 39 TS S1 3 38 TR segment driver S3 4 37 B1, C1 13 segment driver BP 5 36 G2 E4 14 segment driver PM 6 35 F2 D4 15 segment driver AM 7 34 A2 C4 16 segment driver E2 8 33 B2 B4 17 segment driver S2 18 set minutes D2 9 32 P3, P4 S4 19 internal voltage regulation VSS 20 negative supply E3 11 30 G3 S6 21 selectable correction mode D3 12 29 F3 n.c. 22 not connected C3 13 28 A3 VDD 23 positive supply E4 14 27 B3 A4 24 segment driver D4 15 26 G4 F4 25 segment driver G4 26 segment driver C4 16 25 F4 B3 27 segment driver B4 17 24 A4 A3 28 segment driver S2 18 23 F3 29 segment driver S4 19 22 n.c. G3 30 segment driver V SS 20 P1, P2 31 colon flashing P3, P4 32 colon static B2 33 segment driver A2 34 segment driver F2 35 segment driver G2 36 segment driver B1, C1 37 segment driver 1997 Apr 16 31 P1, P2 C2 10 PCF1172CT VDD 21 S6 MSA986 Fig.1 Pin configuration, PCF1172CT, (VSO40). 3 Philips Semiconductors Product specification 31/2-digit LCD car clock PCF1172C A2 AM PM B1 F2 A3 B2 G2 C1 E2 C2 P1 (P3) P2 (P4) F3 A4 B3 F4 G3 E3 D2 B4 G4 C3 E4 D3 C4 D4 MSA989 Fig.2 Segment designation of LCD. TIME AM MSA990 Fig.3 Display mode (12-hour with AM/PM annunciator). OPERATIONAL INPUTS Set minutes/reset seconds, switch S2 Operational inputs S1, S2 and S3 have an internal pull-up resistor to facilitate use of external single-pole, single-throw switches. A specific debounce circuit is integrated as protection against contact debounce and parasitic voltages. When S2 is closed, the minute setting is corrected according to the correction mode determined by S6 (see Chapter “Input options”). The seconds counter is reset to zero each time S2 is closed, and begins running each time S2 is opened. In the description below, an arrangement as shown in Fig.5 is assumed and S1, S2 and S3 refer to the external switches rather than the corresponding inputs. Segment test/reset, switches S1 and S2 If S1 and S2 are closed simultaneously all LCD segments are switched on. When the switches are released, the clock starts at 1 : 00. Set hours, switch S1 Closure of S1 increments the hours according to the correction mode selected by S6 (see Chapter “Input options”). 1997 Apr 16 4 Philips Semiconductors Product specification 31/2-digit LCD car clock PCF1172C Time correction ±2 minutes, switch S3 Single/continuous correction mode, switch S6 .This switch operates in two ranges: For single-set correction mode, S6 is connected to VDD. Each closure of S1 or S2 advances the counter by one. • Displayed time ≥ 58 minutes 00 seconds • Displayed time ≤ 1 minute 59 seconds. For continuous-set correction mode, S6 is connected to VSS. Momentary closure of S1 or S2 causes single increments as for single-set correction mode. If S1 or S2 is kept closed for more than 1s, the counter is automatically incremented by 1 for each full second that S1 or S2 is kept closed. When switch S3 is pressed in these ranges, the minutes and seconds are reset to zero. For displayed time ≥ 58 minutes 00 seconds, the hour is also incremented by one. INPUT OPTIONS TESTING In the description below S4 and S6 refer to the external switches shown in Fig.5 rather than to the corresponding inputs. In normal operation the test inputs TR (pin 38) and TS (pin 39) have to be connected to VDD (pin 23). A test frequency (64 Hz) is available at BP (pin 5). The test mode is activated by connecting TS to VSS (pin 20). All output frequencies are then increased by a factor of 65536. In this mode the maximum input frequency is 100 kHz (external generator at OSC IN). By connecting TR to VSS all counters (seconds, minutes and hours) are stopped. After connecting TR to VDD all counters start from an initial state. In a real application, these inputs will normally be bonded to the appropriate level to give the required function mode. Internal/external regulation, switch S4 For internal regulation, S4 is closed, the internal voltage regulator is active and the voltage supply for the LCD is regulated to 5 V. For external regulation, S4 is open and the circuit has to be supplied with an externally regulated voltage. The switches/inputs described above also operate in the test mode. LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). SYMBOL PARAMETER CONDITIONS note 1 MIN. − MAX. 8 UNIT VDD supply voltage with respect to VSS with internal regulation disconnected V VI all input voltages VSS − 0.3 VDD + 0.3 V Tamb operating ambient temperature −40 +85 °C Tstg storage temperature −55 +125 °C Note 1. Connecting the supply voltage with reverse polarity, will not harm the circuit, provided the current is limited to 10 mA by the external resistor. HANDLING Inputs and outputs are protected against electrostatic discharges in normal handling. However, to be totally safe, it is advisable to take handling precautions appropriate to handling MOS devices. Advice can be found in “Data Handbook IC16, General, Handling MOS Devices”. 1997 Apr 16 5 Philips Semiconductors Product specification 31/2-digit LCD car clock PCF1172C CHARACTERISTICS VDD = 5 V; VSS = 0 V; Tamb = −40 to +85 °C; crystal: f = 4.194304 MHz; Rs = 50 Ω; CL = 12 pF; unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Supply VDD supply voltage external regulation external regulation internal regulation IREG = 1 mA IREG regulation current with internal regulation IDD current consumption ro differential internal impedance IREG = 1 mA 3 − 6 V 3 − 6 V 4 5 6 V 0.2 − 5 mA 400 700 µA − − 150 Ω − − 200 ms all switches open; without LCD; 50 internal regulation disconnected; note 1 Oscillator (pins 1 and 2; note 2) tosc start time ∆VDD = 100 mV − 0.2 × 10−6 1× 10−6 ∆f/fosc frequency stability Rfb feedback resistance 0.1 − 1 MΩ Ci input capacitance − − 9 pF Co output capacitance 19 24 29 pF 50 150 500 µA 32 − 150 ms Switches S1, S2 and S3 (pins 18, 3 and 4) Ii input current with inputs connected to VSS td debounce time RS segment driver output resistance IL = ±50 µA − 1 2.5 kΩ RBP backplane driver output resistance IL = ±250 µA − 0.2 0.5 kΩ fBP backplane driver output frequency − 64 − Hz Voffset(DC) LCD DC offset voltage − − ±50 mV RL = 200 kΩ; CL = 1 nF Notes 1. The current IEXT = IREG + IDD + 2 × Ii (+ LCD current). 2. For correct operation of the oscillator: VDD ≥ 3 V. 1997 Apr 16 6 Philips Semiconductors Product specification 31/2-digit LCD car clock PCF1172C CHIP DIMENSIONS AND BONDING PAD LOCATIONS B4 S2 S4 VSS S6 n.c. V DD A4 y F4 C4 G4 D4 B3 E4 A3 C3 F3 D3 E3 G3 2.66 mm PCF1172CU P1, P2 C2 P3, P4 D2 B2 E2 A2 AM PM F2 2.36 mm BP S3 S1 OSC IN OSC OUT V DD TS TR x B1, C1 G2 0 0 MSA988 n.c. = not connected. Chip area: 6.28 mm2. Bonding pad dimensions: 110 µm × 110 µm. Chip thickness: 381 ±25 µm. Fig.4 Bonding pad locations, PCF1172CU; 40 terminals. 1997 Apr 16 7 Philips Semiconductors Product specification 31/2-digit LCD car clock PCF1172C Table 1 Bonding pad locations (dimensions in µm) All x/y coordinates are referenced to the pad G2, see Fig.4. PAD x y OSC OUT 1060 0 OSC IN 1260 0 S1 1460 S3 BP x y S6 860 2320 n.c. 660 2320 0 VDD 460 2320 1680 0 A4 240 2320 1920 0 F4 0 2320 PM 1920 240 G4 0 2080 AM 1920 460 B3 0 1860 E2 1920 660 A3 0 1660 D2 1920 860 F3 0 1460 C2 1920 1060 G3 0 1260 E3 1920 1260 P1, P2 0 1060 D3 1920 1460 P3, P4 0 860 C3 1920 1660 B2 0 660 E4 1920 1860 A2 0 460 D4 1920 2080 F2 0 240 C4 1920 2320 G2 0 0 B4 1680 2320 B1, C1 240 0 S2 1460 2320 TR 460 0 S4 1260 2320 TS 660 0 VSS 1060 2320 VDD 860 0 chip corner (max. value) −220 −170 1997 Apr 16 PAD 8 Philips Semiconductors Product specification 31/2-digit LCD car clock PCF1172C APPLICATION INFORMATION R = 4.7 kΩ to 8.2 kΩ battery C T = 5 pF to 25 pF I EXT VDD S6 selectable correction mode VDD VSS 23 S6 TR 38 TS 39 40 2 I DD 1 S3 2 minutes correction 2 Ii 33 µF to 100 µF SHUNT VOLTAGE REGULATOR S3 S1 set hour OSC OUT OSC IN (VDD ) 21 I REG S2 set minutes 4.19 MHz (1) segment drivers to LCD 4 S2 PCF1172C 18 S1 3 19 S4 internal voltage regulation 20 VSS S4 MSA987 (1) Only required if internal regulation is disconnected. From pin 2 (OSC IN) to any other pin the stray capacitance should not exceed 2 pF. Fig.5 Typical application diagram. 1997 Apr 16 9 Philips Semiconductors Product specification 31/2-digit LCD car clock PCF1172C PACKAGE OUTLINE VSO40: plastic very small outline package; 40 leads; face down SOT158-2 D E A y X c HE v M A Z 40 21 L Lp θ A1 Q (A 3) A2 A pin 1 index detail X 1 20 w M bp e 0 5 10 mm scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT A max. A1 A2 A3 bp c D (1) E (2) e HE L Lp Q v w y Z (1) mm 2.70 0.3 0.1 2.45 2.25 0.25 0.42 0.30 0.22 0.14 15.6 15.2 7.6 7.5 0.762 12.3 11.8 2.25 1.7 1.5 1.15 1.05 0.2 0.1 0.1 0.6 0.3 0.012 0.096 0.017 0.0087 0.61 0.010 0.004 0.089 0.012 0.0055 0.60 0.30 0.29 0.03 0.48 0.46 0.067 0.089 0.059 inches 0.11 0.045 0.024 0.008 0.004 0.004 0.041 0.012 θ 7o 0o Note 1. Plastic or metal protrusions of 0.4 mm maximum per side are not included. 2. Plastic interlead protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION REFERENCES IEC JEDEC EIAJ ISSUE DATE 92-11-17 95-01-24 SOT158-2 1997 Apr 16 EUROPEAN PROJECTION 10 Philips Semiconductors Product specification 31/2-digit LCD car clock PCF1172C SOLDERING Wave soldering Introduction Wave soldering techniques can be used for all VSO packages if the following conditions are observed: There is no soldering method that is ideal for all IC packages. Wave soldering is often preferred when through-hole and surface mounted components are mixed on one printed-circuit board. However, wave soldering is not always suitable for surface mounted ICs, or for printed-circuits with high population densities. In these situations reflow soldering is often used. • A double-wave (a turbulent wave with high upward pressure followed by a smooth laminar wave) soldering technique should be used. • The longitudinal axis of the package footprint must be parallel to the solder flow. • The package footprint must incorporate solder thieves at the downstream end. This text gives a very brief insight to a complex technology. A more in-depth account of soldering ICs can be found in our “IC Package Databook” (order code 9398 652 90011). During placement and before soldering, the package must be fixed with a droplet of adhesive. The adhesive can be applied by screen printing, pin transfer or syringe dispensing. The package can be soldered after the adhesive is cured. Reflow soldering Reflow soldering techniques are suitable for all VSO packages. Maximum permissible solder temperature is 260 °C, and maximum duration of package immersion in solder is 10 seconds, if cooled to less than 150 °C within 6 seconds. Typical dwell time is 4 seconds at 250 °C. Reflow soldering requires solder paste (a suspension of fine solder particles, flux and binding agent) to be applied to the printed-circuit board by screen printing, stencilling or pressure-syringe dispensing before package placement. A mildly-activated flux will eliminate the need for removal of corrosive residues in most applications. Several techniques exist for reflowing; for example, thermal conduction by heated belt. Dwell times vary between 50 and 300 seconds depending on heating method. Typical reflow temperatures range from 215 to 250 °C. Repairing soldered joints Fix the component by first soldering two diagonallyopposite end leads. Use only a low voltage soldering iron (less than 24 V) applied to the flat part of the lead. Contact time must be limited to 10 seconds at up to 300 °C. When using a dedicated tool, all other leads can be soldered in one operation within 2 to 5 seconds between 270 and 320 °C. Preheating is necessary to dry the paste and evaporate the binding agent. Preheating duration: 45 minutes at 45 °C. 1997 Apr 16 11 Philips Semiconductors Product specification 31/2-digit LCD car clock PCF1172C DEFINITIONS Data sheet status Objective specification This data sheet contains target or goal specifications for product development. Preliminary specification This data sheet contains preliminary data; supplementary data may be published later. Product specification This data sheet contains final product specifications. Limiting values Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information Where application information is given, it is advisory and does not form part of the specification. LIFE SUPPORT APPLICATIONS These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such improper use or sale. 1997 Apr 16 12 Philips Semiconductors Product specification 31/2-digit LCD car clock PCF1172C NOTES 1997 Apr 16 13 Philips Semiconductors Product specification 31/2-digit LCD car clock PCF1172C NOTES 1997 Apr 16 14 Philips Semiconductors Product specification 31/2-digit LCD car clock PCF1172C NOTES 1997 Apr 16 15 Philips Semiconductors – a worldwide company Argentina: see South America Australia: 34 Waterloo Road, NORTH RYDE, NSW 2113, Tel. +61 2 9805 4455, Fax. +61 2 9805 4466 Austria: Computerstr. 6, A-1101 WIEN, P.O. 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The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights. Printed in The Netherlands 417087/1200/02/pp16 Date of release: 1997 Apr 16 Document order number: 9397 750 01527