Datasheet

ManualsBrandsBROADCOM ManualsDisplaysDot matrix dislplay Red 4.57 mm No. of digits: 8

Features

• Easy to use

• Interfaces directly with microprocessors

• 0.15” character height in 4, 8, and 16 (2×8) character

packages

• 0.20” character height in 4 and 8 character packages

• Rugged X- and Y-stackable package

• Serial input

• Convenient brightness controls

• Wave solderable

• Oered in ve colors

• Low power CMOS technology

• TTL compatible

Applications

• Telecommunications equipment

• Portable data entry devices

• Computer peripherals

• Medical equipment

• Test equipment

• Business machines

• Avionics

• Industrial controls

Device Selection Guide

Deep Red HER Orange Yellow Green Package

Description HCMS- HCMS- HCMS- HCMS- HCMS- Drawing

1 × 4 0.15” Character 2905 2902 2904 2901 2903 A

1 × 8 0.15” Character 2915 2912 2914 2911 2913 B

2 × 8 0.15” Character 2925 2922 2924 2921 2923 C

1 × 4 0.20” Character 2965 2962 2964 2961 2963 D

1 × 8 0.20” Character 2975 2972 2974 2971 2973 E

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

Description

The HCMS-29xx series are high performance, easy

to use dot matrix displays driven by on-board CMOS

ICs. Each display can be directly inter faced with a

microproces sor, thus eliminat ing the need for cum ber-

some interface compo nents. The serial IC interface al-

lows higher char ac ter count information displays with a

minimum of data lines. A variety of colors, font heights,

and character counts gives designers a wide range of

prod uct choices for their specic appli cations and the

easy to read 5×7 pixel format allows the display of up-

percase, lower case, Kata kana, and custom user-dened

characters. These dis plays are stackable in the x- and

y- directions, making them ideal for high character

count displays.

HCMS-29xx Series

High Performance CMOS 5×7 Alphanumeric Displays

Data Sheet

Summary of content (16 pages)

PAGE 1
HCMS-29xx Series High Performance CMOS 5×7 Alphanumeric Displays Data Sheet Description Features The HCMS-29xx series are high performance, easy to use dot matrix displays driven by on-board CMOS ICs. Each display can be directly interfaced with a microprocessor, thus eliminating the need for cumber some interface components. The serial IC interface allows higher character count information displays with a minimum of data lines.
PAGE 2
HCMS-290x 17.78 (0.700) MAX. PIN FUNCTION ASSIGNMENT TABLE PIN # FUNCTION 1 DATA OUT 2 OSC 3 V LED 4 DATA IN 5 RS 6 CLK 7 CE 8 BLANK 9 GND 10 SEL 11 V LOGIC 12 RESET 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. DATE CODE LIGHT INTENSITY CATEGORY COLOR BIN COUNTRY OF ORIGIN PIN # 1 IDENTIFIER PART NUMBER 5.08 (0.200) 0.25 (0.010) HCMS-290X X Z YYWW COO 4.32 TYP. (0.170) 0.51 (0.020) PIN # 1 2.54 SYM. (0.100) 1.27 SYM. (0.050) 2.
PAGE 3
HCMS-292x PIN FUNCTION ASSIGNMENT TABLE PIN # FUNCTION PIN # FUNCTION 1A NO PIN 1B NO PIN 2A NO PIN 2B NO PIN 3A V LED 3B V LED 4A NO PIN 4B NO PIN 5A NO PIN 5B NO PIN 6A NO PIN 6B NO PIN 7A GND LED 7B GND LED 8A NO PIN 8B NO PIN 9A NO PIN 9B NO PIN 10A V LED 10B V LED 11A NO PIN 11B NO PIN 12A NO PIN 12B NO PIN 13A NO PIN 13B NO PIN 14A DATA IN 14B DATA IN 15A RS 15B RS 16A NO PIN 16B NO PIN 17A CLOCK 17B CLOCK 18A CE 18B CE 19A BLANK 19B BLANK 20A GND LOGIC 20B GND LOGIC 21A SEL 21B SEL 22A V LOGIC 22B V
PAGE 4
HCMS-297x 42.93 (1.690) MAX. 2.67 (0.105) SYM. 4.57 TYP. (0.180) 5.36 (0.211) TYP. PIN FUNCTION ASSIGNMENT TABLE 26 1 2 3 4 5 6 7 8 11.43 (0.450) MAX. 3 2.54 (0.100) TYP. PIN # 1 IDENTIFIER DATE CODE (YEAR, WEEK) INTENSITY CATEGORY COLOR BIN COUNTRY OF ORIGIN PART NUMBER 0.51 (0.020) HCMS-297X YYWW 0.25 (0.010) 5.31 (0.209) X Z COO 3.71 TYP. (0.146) 6.22 SYM. (0.245) 0.51 ± 0.13 TYP. (0.020 ± 0.005) 1.90 SYM. (0.075) 2.54 ± 0.13 TYP. (0.100 ± 0.005) (NON ACCUM.) 7.62 (0.
PAGE 5
Electrical Characteristics Over Operating Temperature Range (-40 °C to +85 °C) TA = 25 °C VLOGIC = 5.0 V Parameter Symbol Typ. Max. -40 °C < TA < 85 °C 3.0 V < VLOGIC < 5.5 V Min. Max. Units Test Conditions Input Leakage Current II HCMS-290x/296x (4 char) +7.5 -2.5 +50 HCMS-291x/297x (8 char) +15 -5.0 +100 HCMS-292x (16 char) +15 -5.0 +100 µA VIN = 0 V to VLOGIC ILOGIC OPERATING ILOGIC(OPT) HCMS-290x/296x (4 char) 0.4 2.5 5 HCMS-291x/297x (8 char) 0.
PAGE 6
Optical Characteristics at 25 °C[1] VLED = 5.0 V, 50% Peak Current, 100% Pulse Width Luminous Intensity per LED [2] Character Average (µcd) Display Color Part Number Min. Typ. Peak Wavelength lPeak (nm) Typ. Dominant Wavelength ld [3] (nm) Typ. Deep Red HCMS-29x5 95 2035 645 637 High Efficiency Red HCMS-29x2 64 270 635 626 Orange HCMS-29x4 64 180 600 602 Yellow HCMS-29x1 64 180 583 585 Green HCMS-29x3 64 270 568 574 Notes: 1.
PAGE 7
AC Timing Characteristics Over Temperature Range (-40 °C to +85 °C) Timing Diagram Ref. Number Description  Symbol 4.5 V < VLOGIC <5.5 V Min. Max. VLOGIC = 3 V Min. Max.
PAGE 8
Display Overview Dot Register The HCMS‑29xx series is a family of LED displays driven by on‑board CMOS ICs. The LEDs are configured as 5 x 7 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.
PAGE 9
HCMS-29xx Write Cycle Diagram RS TRSS 1 TRSH 2 CE T CLKCE T CES 3 TCLKH 4 11 TCEH TCLKL 5 12 CLK TDS 6 NEW DATA LATCHED HERE [1] TDH 7 DIN T CEDO TDOUT 10 8 D OUT (SERIAL) TDOUTP 9 D OUT (SIMULTANEOUS) LED OUTPUTS, CONTROL REGISTERS PREVIOUS DATA NEW 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.
PAGE 10
DATA OUT RS (LATCHED) DATA IN CLK H L L H H SER/PAR MODE CHIP ENABLE REGISTER SELECT D Q DATA IN CLR CONTROL REGISTER L DI 40 BIT S.R. DO DATA OUT DI 40 BIT S.R.
PAGE 11
Control Word 1 Bits D2‑D6 Loading the Control Register with D7 = logic high selects Control Word 1. This Control Word performs two functions: serial/simultaneous data out mode and external oscillator prescale select (see Table 2). These bits must always be programmed to logic low. Serial/Simultaneous Data Output D0 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.
PAGE 12
Table 2. Control Shift Register CONTROL WORD 0 L D5 D6 D4 Bit D7 Set Low to Select Control Word 0 D3 D2 D1 D0 PWM Brightness Control L L L L L L L L H H H H H H H H Peak Current Brightness Control H L L H L L H H L L L L H H H H L L L L H H H H L L H H L L H H L L H H L L H H Typical Peak Pixel Current (mA) 4.0 6.4 9.3 12.8 L H L H L H L H L H L H L H L H On-Time Oscillator Cycles Duty Factor (%) Relative Brightness (%) 0 1 2 3 4 5 7 9 11 14 18 22 28 36 48 60 0 0.2 0.4 0.6 0.8 1.0 1.4 1.
PAGE 13
CE RS BL RESET CLK CE RS BL CE RS BL DOUT SEL OSC DIN Figure 3.
PAGE 14
The display IC has a maximum junction temperature of 150°C. The IC junction temperature can be calculated with Equation 1. A typical value for RqJ-A 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 in. thick PCB with .020 inch wide, one ounce copper traces. PD can be calculated as in Equation 2. Figure 4 shows how to derate the power of one IC versus ambient temperature.
PAGE 15
Current Calculations Electrostatic Discharge The peak and average display current requirements have a significant impact on power supply selection. The maximum peak current is calculated with Equation 3. The inputs to the ICs are protected against static discharge and input current latchup. However, for best results, standard CMOS handling precautions should be used. Before use, the HCMS‑29xx should be stored in antistatic tubes or in conductive material.
PAGE 16
Appendix E. Display Brightness 3.0 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. To compute the resulting display brightness when both PWM and peak current control are used, simply multiply the two relative brightness factors.