feature

Enhanced drop-in replacement - to HPDL-2416 Smart Alphanumeric Display Built-in RAM, ASCII Decoder, and LED Driver Circuit Low Power CMOS IC Consumer Software Controlled Dimming Level and Blank Intensity; Yellow and Green Sorted Colors Low Power and Sunlight Visible AlGaAs Versions Wide Operating Range -40°C to +85°C Excellent ESD Protection Solderable Wide Viewing Angle (50° Typical)

illustrate

These are 5.0 mm (0.2 in) four character 5 x 7 dot matrix display CMOS ICs driven by the vehicle. These monitors are pin for use with the HPDL-2416. The integrated circuit stores and decodes 7-bit ASCII data and displays it using a 5 x 7 font. Multiplexing circuits, and parts of integrated circuits. The IC has fast set-up and hold functions that make it easy to interface with microprocessors.

Absolute Maximum Ratings

Supply Voltage, V DD to Ground[1] -0.5V to 7.0V

Input voltage, any pin to ground -0.5 V to V DD+0.5 V

Free Air Operating Temperature Range, T A -40°C to +85°C

Storage temperature T S-40 °C to 100 °C

CMOS IC junction temperature, tj(IC) +150 degrees Celsius

Relative humidity (non-condensing) 85% at 65°C

Maximum Soldering Temperature, 1.59 mm

Below the seat surface (0.063 in.), t<5 seconds at 260 degrees Celsius

ESD Protection, R=1.5 kΩ, C=100 pFV Z=2 kV (per pin)

Note:

1. Maximum voltage without LED lighting.

The address and data inputs can be connected directly to the microprocessor address and data. HDLX-2416 has several enhancements over HPDL - 2416. These features include extended character set, internal 8-level dimming control, external dimming capability, personalization - dual digit blanking. The last extension function can be disabled, allowing the HDLX-2416 to operate as if by disabling all enhancements except the pre-expand character set. The difference between the daylight-viewable HDLS-2416 and the low-power HDLU-2416 appears at power-on or default brightness levels. Following the force up, the HDLS-2416 is at 100% brightness level, while the HDLU-2416 is at 27% brightness level. The controls (bits 3-5) in the power-on settings internal brightness controls are registered to binary code (000). For HDLS-2416 binary code (000) corresponds to 100% brightness and HDLU-2416 binary code (000) corresponds to 27% brightness. The other seven brightness levels are the same in both parts.

notes:

1. Tolerances on all dimensions are ±0.254 mm (±0.010") unless otherwise specified

2. All dimensions are in mm/inch.

3. For yellow and green monitors only.

Electrical Characteristics over Operating Temperature Range 4.5

notes:

1.V DD=5.0V

2. Average IDD measured at full brightness. Peak IDD = 28/15 x Average IDD (#).

3.IDD(#)max.=HDLO/HDLA/HDLY/HDLG-2416 is 130mA, HDLR/HDLS-2416 is 146mA, HDLU-2416 default is 42mA brightness, 150°C IC junction temperature and V DD = 5.5 V.

Optical characteristics at 25°C[1]V DD=5.0 V, full brightness

notes:

1. Refers to the initial case temperature of the device before light measurement.

2. The dominant wavelength λd is derived from the CIE chromaticity diagram and represents the color of the defined device.

AC timing characteristic is too large V temperature range DD=4.5V

Display Internal Block Diagram Figure 1 shows the HDLX-2416 display internal block diagram. The CMOS integrated circuit consists of 4 × 7 character RAM, 2 × 4 attribute RAM, 5-bit control register, a128 character ASCII decoder and refresh circuit required for synchronous decoding and four 5 × 7 dot matrix drive displays. Store four 7-bit ASCII words in character RAM. The IC reads ASCII data and decodes it through a 128-character ASCII decoder. The ASCII decoder includes 64 character set HPDL-2416, 32 lowercase ASCII symbols and 32 foreign language symbols. The 5-bit word is stored in the control register. Three areas within the control register provide 8-level brightness controls, master blank and ex-trend function deactivation. For each displayed digit position, two bits are stored in the attribute ram. One bit to enable the cursor character location at each digit. The second is used to individually deactivate the blanking feature for each digit position. The display is blank by internally dimming the blank input on the line driver. The logic inside the IC allows the user to dim the display BL input or register via the brightness control in the control. Likewise, the display can be masked via the BL input, the main blank register in the controls, or the digital blank disabled in the property RAM.

show clear

Data RAM, control registers and if cleared (CLR) stored in characters are held low for at least 10 microseconds. Note that the display will be cleared regardless of the state of the chip (CE 1, CE 2). Cleared after display, spaces (20hex) are loaded into all character RAM locations and 00hex is loaded into all attribute RAM/control register memory locations. Data Input Figure 2 shows the HDLX-2416 display. Setting the chip to enable (CE 1, CE 2) to logic 0 and cursor select (CU) to logic 1 will enable ASCII data loading. When Cursor Selected (CU) is set to logic 0, the data will be loaded into the control register as well as the attribute RAM. Address inputs A 0-A 1 are used to select digit positions on the display. Data inputs D 0-D 6 are used to load information into the display. Data will be latched on the rising edge of the WR signal in the display. D 0-D 6, a0-A 1, ce1, CE 2 and CU must maintain stable write cycles to ensure correct data is stored on the display. Data can be loaded to display in any order. Note that when 0 and 1 are logical 0s, the data is stored in the rightmost display location. Cursor When cursor enabled (hint) is logic 1, a cursor will be displayed at all digit positions where 1 has been stored in the digit property in the cursor memory ram. The cursor is half-lit by all 35 points. A flashing cursor can be displayed through the pulse signal. When the cue is logic 0, the character stored in RAM will be dis- played regardless of the digit of the cursor bit. The blanking of the blanking display is a con-scroll control register and attribute ramming in the BL input. Users can achieve this by using various combinations of these controls, such as full hardware display blank, software blank, blank individual characters and syn- individual timing flash characters or the entire display (pressing

select blank input). All of these blanking modes only affect the output driver, maintaining the content and writing capabilities of the internal plunger and control registers so that RAMs are loaded normally and the control registers can be blanked even with a display. Figure 3 shows the function disable (bit D 6 control register), main blank (bit D2 of the control register), digital blank disable (bit D 1 attribute RAM) and BL input can be used for blank display. When extension function disabled is logic 1, the display can only override the input with BL. When the extended function Disable is logic 0 the display can hide the BL input, the main blank, and the digital blank are disabled. The all-digital blank disable bit is a logic 0 if the BL input is a logic 0 or the primary blank is a logic 1. Those numbers with digital blank disable bit logic 1 will ignore blank signal and continue. Numeric blank disable bit allows single blank character or BL input with synchronous blinking.

Dimming

Display dimmed - via BL input or control register. A pulse width modulated signal can be applied to the BL input to dim the display. A three-bit word control register generates an internal pulse width modulated signal that dims the display. This internal dimming function is only disabled if the extended function is logic 0.

Bits 3-5 in the Control Register

Provides internal brightness control. These bits are interpreted as a three-bit binary code code (000) corresponding to maximum brightness and code (111) to minimum brightness. In addition to changing the display brightness, bits 3-5 also change the average value of the IDD. I can be specified at any brightness level as shown in Table 1

Figure 4. Intensity modulation control using astable multivibrator

Figure 4 shows the circuit designed to dim the display from 98% to 2% by PWMing the BL input. Logarithmic or linear potentiometers can be used to adjust the display intensity. However, the response of the logarithmic potential-meter is intensified with the human eye and therefore low resolution. The circuit frequency should be designed to be at 10 kHz or higher. Low frequency -cies can cause display flickering. Extended Function Disable Extended Function Disable (bit D6 of the control register) disables extended punching-ming function in HDLX-2416. If extended function disable is logic 1, the internal brightness controls, master blanks, and numbers ignore blank disable bits. But the BL input and cursor controls are still active. This allows backward compatibility to HPDL-2416.

Electromechanical precautions

The HDLX-2416 is an 18-pin dip stackable package that creates arrays of any size horizontally and vertically. The HDLX-2416 is designed to operate from -40°C continuously to +85°C for all possible input conditions. The HDLX-2416 consists of die-connected and lead-connected 140 LEDs and a CMOS integrated circuit high temperature printed circuit. Polycarbonate lenses are placed on the PC board to create air gap ambient LED wire connections. Epoxy backfill environmentally sealed display package. This package construction - makes the display highly resistant to temperature cycling allowing for wave soldering. The input of the CMOS integrated circuit is ESD-preventive input current blocking. How - For best results standard CMOS handling precautions should be used. HDLX-2416 should be stored in antistatic tube or conductive tube material prior to use. A grounded conductive work area should be used during assembly a, and assemblers should wear conductive clothing wrist straps. Synthetic materials for lab coats should be avoided as they are prone to static buildup.

Input current when the CMOS input is shot to a voltage below ground (v in or to a) Voltages higher than when a high current is forced on the input prevents the input current from clipping the unused input to ground or with the ground page: 1 volta should not be applied to the input until DD has been applied to the display. Transient input voltage should be eliminated

Soldering and Mounting

Solder cleaning

Instructions for use

Model HDLX-2416 HDLX-2416 may be hand soldered or wave soldered with SN63 solder. When hand soldering is recommended - electronic temperature control is firmly grounded with iron. For best results the iron tip should be set at 315°C (600°F). For wave solder, a rosin-based RMA flux can be used. The solder wave temperature should be set to 245°C ± 5°C (473°F ± 9°F), and the standing wave should be set between 1 1/2 to 3 seconds for optimal soldering. The preheat temperature should not exceed 110°C (230°F) on the side of the soldered PC board. For more information on solder - post-solder cleanup, see Application Note 1027, Soldering LED Components. Contrast Enhancement The purpose of contrast enhancement - the purpose is to provide good readability - ity lighting conditions in the end user environment. The concept is to utilize luminance and chrominance contrast techniques. These enhance readability by blending the dots into the display background and open-dots on the same background.