Datasheet

ManualsBrandsBROADCOM ManualsDisplaysDot matrix dislplay Green 3.71 mm No. of digits: 8

HCMS-3901, HCMS-3902, HCMS-3961, HCMS-3962,

HCMS-3911, HCMS-3912, HCMS-3971, HCMS-3972

HCMS-3903, HCMS-3904, HCMS-3963, HCMS-3964,

HCMS-3913, HCMS-3914, HCMS-3973, HCMS-3974

ESD WARNING: STANDARD CMOS HANDLING PRECAUTIONS SHOULD BE OBSERVED TO AVOID STATIC DISCHARGE

Description

The 3.3 V HCMS-39xx family is similar to the 5.0 V

HCMS-29xx family, except it operates at a lower

operating voltage. Package dimen sions and pin outs

are exactly the same for both families. The product has

been thoroughly characterized and stringent reliability

tested to ensure that the product is of high quality.

Similar to the 5.0 V platform, this family product is

a high per formance, easy to use dot matrix display

driven by on-board CMOS IC. Each display can be

directly interfaced with a micro processor, thus

eliminating the need for cumbersome interface com-

ponents. The serial IC interface allows higher character

count information displays with a minimum of data

lines. The easy to read 5x7 pixel format allows the

display of upper case, lower case, Katakana, and custom

user-dened characters. These displays are stackable

in the x- and y-directions, making them ideal for high

character count displays.

Features

x Easy to use

x Interfaces directly with microprocessors

x 0.15” character height in 4 and 8 character package

x 0.20” character height in 4 and 8 character package

x Rugged X- and Y-stackable package

x Serial input

x Convenient brightness controls

x Wave solderable

x Low power CMOS technology

x TTL compatible

x 3.3 V operating voltage

Applications

x Telecommunications equipment

x Portable data entry devices

x Computer peripherals

x Medical equipment

x Test equipment

x Business machines

x Avionics

x Industrial controls

HCMS-39xx

3.3 V High Performance CMOS

5x7 AlphaNumeric Displays

Data Sheet

Summary of content (18 pages)

PAGE 1
HCMS-39xx 3.3 V High Performance CMOS 5x7 AlphaNumeric Displays Data Sheet HCMS-3901, HCMS-3902, HCMS-3961, HCMS-3962, HCMS-3911, HCMS-3912, HCMS-3971, HCMS-3972 HCMS-3903, HCMS-3904, HCMS-3963, HCMS-3964, HCMS-3913, HCMS-3914, HCMS-3973, HCMS-3974 Description Features The 3.3 V HCMS-39xx family is similar to the 5.0 V HCMS-29xx family, except it operates at a lower operating voltage. Package dimensions and pin outs are exactly the same for both families.
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Package Dimensions 17.78 (0.700) MAX. PIN FUNCTION ASSIGNMENT TABLE 4.45 (0.175) TYP. 2.22 (0.087) SYM. 12 1 3.71 (0.146) TYP. 2 3 4 10.16 (0.400) MAX. 1 2.11 (0.083) TYP. FUNCTION 1 2 3 4 5 6 7 8 9 10 11 12 DATA OUT OSC V LED DATA IN RS CLK CE BLANK GND SEL V LOGIC RESET DATE CODE LIGHT INTENSITY CATEGORY COLOR BIN COUNTRY OF ORIGIN PIN # 1 IDENTIFIER PART NUMBER 5.08 (0.200) PIN # 0.25 (0.010) HCMS-390x X Z YYWW COO 4.32 TYP. (0.170) 0.51 (0.020) PIN # 1 2.54 SYM. (0.100) 1.27 (0.
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Package Dimensions, continued 21.46 (0.845) MAX. PIN FUNCTION ASSIGNMENT TABLE 2.67 (0.105) SYM. 2.54 (0.100) TYP. 4.57 TYP. (0.180) 0 1 2 3 PIN # FUNCTION 1 2 3 4 5 6 7 8 9 10 11 12 DATA OUT OSC V LED DATA IN RS CLK CE BLANK GND SEL V LOGIC RESET 11.43 (0.450) MAX. 5.36 (0.211) TYP. PIN # 1 IDENTIFIER DATE CODE (YEAR, WEEK) INTENSITY CATEGORY COLOR BIN COUNTRY OF ORIGIN PART NUMBER HCMS-396x YYWW X Z 0.25 (0.010) 5.31 (0.209) COO 3.71 (0.146) TYP. 0.50 (0.020) 0.169 SYM. (4.28) 0.
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Device Selection Guide Description Yellow Red Green Orange 1 x 4 0.15” Character HCMS-3901 HCMS-3902 HCMS-3903 HCMS-3904 1 x 8 0.15” Character HCMS-3911 HCMS-3912 HCMS-3913 HCMS-3914 1 x 4 0.20” Character HCMS-3961 HCMS-3962 HCMS-3963 HCMS-3964 1 x 8 0.20” Character HCMS-3971 HCMS-3972 HCMS-3973 HCMS-3974 Absolute Maximum Ratings Logic Supply Voltage, VLOGIC to GNDLOGIC ..................................... -0.3 V to 7.0 V LED Supply Voltage, VLED to GNDLED .........................
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Electrical Characteristics over Operating Temperature Range (-40°C to +85°C) Parameter Symbol Input Leakage Current HCMS-390X/396X (4 char) HCMS-391X/397X (8 char) ILOGIC OPERATING HCMS-390X/396X (4 char) HCMS-391X/397X (8 char) II TA = 25°C -40°C < TA < 85°C VLOGIC = 3.3 V 3.0 V < VLOGIC < 5.5 V Typ. Max. Min. Max. +7.5 +15 -2.5 -5.
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Electrical Description Pin Function RESET (RST) Description Sets Control Register bits to logic low. The Dot Register contents are unaffected by the Reset pin. (logic low = reset; logic high = normal operation). DATA IN (DIN) Serial Data input for Dot or Control Register data. Data is entered on the rising edge of the Clock input. DATA OUT (DOUT ) Serial Data output for Dot or Control Register data. This pin is used for cascading multiple displays.
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AC Timing Characteristics over Temperature Range (-40 to +85°C) Timing Diagram Ref. Number Description Symbol 4.5 V
PAGE 8
Display Overview Dot Register The HCMS-39XX series is a family of LED displays driven by on-board CMOS ICs. The LEDs are configured as 5x7 font characters and are driven in groups of 4 characters per IC. Each IC consists of a 160-bit shift register (the Dot Register), two 7-bit Control Words, and refresh circuitry. The Dot Register contents are mapped on a one-to-one basis to the display. Thus, an individual Dot Register bit uniquely controls a single LED.
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RS TRSS TRSH 1 2 CE T CLKCE T CES 3 T CLKH 4 11 TCLKL 12 T CEH 5 CLK TDS 6 T DH NEW DATA LATCHED HERE [1] 7 DIN T CEDO TDOUT 10 8 DOUT (SERIAL) T DOUTP 9 DOUT SIMULTANEOUS) LED OUTPUTS, CONTROL REGISTERS PREVIOUS DATA NOTE: 1. DATA IS COPIED TO THE CONTROL REGISTER OR THE DOT LATCH AND LED OUTPUTS WHEN CE IS HIGH AND CLK IS LOW. Figure 5. HCMS-39XX write cycle timing diagram Pixel Map In a 4-character display, the 160-bits are arranged as 20 columns by 8 rows.
PAGE 10
DATA OUT RS (LATCHED) H L DATA IN L CLK H H SER/PAR MODE CHIP ENABLE DATA IN REGISTER SELECT CONTROL REGISTER CLR D Q L DI 40 BIT S.R. DO DATA OUT DI 40 BIT S.R. DO DI 40 BIT S.R.
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PIXEL DATA TO NEXT CHARACTER DATA FROM PREVIOUS CHARACTER ROW 7 ROW 6 ROW 5 ROW 4 ROW 3 ROW 2 ROW 1 ROW 0 (NOT USED) Figure 7.
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Control Register The Control Register allows software modification of the IC’s operation and consists of two independent 7-bit control words. Bit D7 in the shift register selects one of the two 7-bit control words. Control Word 0 performs pulse width modulation brightness control, peak pixel current brightness control, and sleep mode. Control Word 1 sets serial/simultaneous data out mode, and external oscillator prescaler. Each function is independent of the others.
PAGE 13
Table 2. Control Shift Register. CONTROL WORD 0 L D6 D5 D4 D3 D2 D1 D0 Bit D7 Set Low to Select Control Word 0 On-Time Duty Oscillator Factor Cycles (%) 0 0 1 0.2 2 0.4 3 0.6 4 0.8 5 1.0 7 1.4 9 1.8 11 2.1 14 2.7 18 3.5 22 4.3 28 5.5 36 7.0 48 9.4 60 11.
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Serial/Simultaneous Data Output D0 Bits D2 -D6 Bit D0 of control word 1 is used to switch the mode of DOUT between serial and simultaneous data entry during Control Register writes. The default mode (logic low) is the serial DOUT mode. In serial mode, DOUT is connected to the last bit (D7) of the Control Shift Register. These bits must always be pro-grammed to logic low. Storing logic high to bit D0 changes DOUT to simultaneous mode, which affects the Control Register only.
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CE RS BL RESET CLK CE CE RS RS BL BL RESET CLK DOUT CLK DIN DOUT SEL SEL OSC OSC OSC SEL DIN Figure 8.
PAGE 16
Appendix A. Thermal Considerations The display IC has a maximum junction temperature of 150°C. The IC junction temperature can be calculated with Equation 1 in Table 3. A typical value for RθJA is 100°C/W. This value is typical for a display mounted in a socket and covered with a plastic filter. The socket is soldered to a .062 inch thick PCB with .020-inch wide, one ounce copper traces. PD can be calculated as Equation 2 in Table 3.
PAGE 17
Appendix B. Electrical Considerations Current Calculations The peak and average display current requirements have a significant impact on power supply selection. The maximum peak current is calculated with Equation 3 in Table 3. The average current required by the display can be calculated with Equation 4 in Table 3. The power supply has to be able to supply IPEAK transients and supply ILED (AVG) continuously.
PAGE 18
Appendix C. Oscillator Appendix E. Display Brightness The oscillator provides the internal refresh circuitry with a signal that is used to synchronize the columns and rows. This ensures that the right data is in the dot drivers for that row. This signal can be supplied from either an external source or the internal source. Two ways have been shown to control the brightness of this LED display: setting the peak current and setting the duty factor. Both values are set in Control Word 0.