UPD6121G-002 NEC, UPD6121G-002 Datasheet

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UPD6121G-002

Manufacturer Part Number
UPD6121G-002
Description
REMOTE CONTROL TRANSMISSION CMOS IC
Manufacturer
NEC
Datasheet

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Document No. U10114EJ6V0DS00 (6th edition)
(Previous No. IC-1813)
Date Published October 1995 P)
Printed in Japan
suited for TVs, VCRs, audio equipment, air conditioners, etc. By combining external diodes and resistors, a maximum
of 65,536 custom codes can be specified. These ICs come in small packages, thus facilitating the design of light
and compact remote control transmitters.
be used for various systems through decoding by a microcontroller.
FEATURES
The PD6121, 6122 are infrared remote control transmission ICs using the NEC transmission format that are ideally
The NEC transmission format consists of leader codes, custom codes (16 bits), and data codes (16 bits). It can
Low-voltage operation: V
Low current dissipation: 1 A Max. (at standby)
Custom codes: 65,536 (set by external diodes and resistors)
Data codes:
6102G
Pin compatibility:
Standard products (Ver. I, Ver. II specifications)
Note Provided for maintenance purpose only
PD6121, 6122 are transmission code-compatible (NEC transmission format) with the PD1913C
oscillator pin and other parameters vary)
oscillator pin and other parameters vary)
PD6121: 32 codes (single input), 3 codes (double input), expandable up to 64 codes through SEL pin
PD6122: 64 codes (single input), 3 codes (double input), expandable up to 128 codes through SEL pin
PD6121G-001 is pin-compatible with the
PD6122G-001 is pin-compatible with the
• When using this product (in NEC transmission format), please order custom codes from NEC.
• New custom codes for the PD6121G-002, PD6122G-002 cannot be ordered.
Note
, and 6120C
REMOTE CONTROL TRANSMISSION CMOS IC
Note
The information in this document is subject to change without notice.
DD
.
= 2.0 to 3.3 V
The mark
DATA SHEET
DATA SHEET
*
PD1943G (However, capacitance of capacitor connected to
PD6102G (However, capacitance of capacitor connected to
shows revised points.
MOS INTEGRATED CIRCUIT
PD6121, 6122
Note
©
©
, 1943G
Note
,
1994
1994
*
*
*

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UPD6121G-002 Summary of contents

Page 1

... These ICs come in small packages, thus facilitating the design of light and compact remote control transmitters. The NEC transmission format consists of leader codes, custom codes (16 bits), and data codes (16 bits). It can be used for various systems through decoding by a microcontroller. ...

Page 2

... PIN IDENTIFICATIONS CCS : Custom code selection input Key input 0 7 KI/O - KI/O : Key input/output 0 7 LMP : Lamp output OSCI, OSCO: Resonator connection pin 2 Package Description Standard (Ver I spec.) Standard (Ver II spec.) Standard (Ver I spec.) Standard (Ver II spec.) 20 CCS KI KI/O KI ...

Page 3

... SOP (375 mil) V LMP DD Output circuit Controller Data register Key input/output circuit KI/O KI/O KI/O KI/O KI/O KI PD6122 V = 2 MAX. 65,536 (16-bit setting Provided NEC transmission format 24-pin plastic SOP (375 mil) PD6121, 6122 * REM V SS KI/O KI ...

Page 4

... CCS input pin By placing a diode between the CCS pin and the KI/O pin possible to set a custom code. When a diode is connected, the corresponding custom code is “1”, and when not connected “0”. (7) LMP output pin The LMP pin outputs a low-level signal while the REM pin outputs a transmission code. ...

Page 5

... If intending to use custom codes other than 00xxH, please consult NEC in order to avoid various types of errors from occurring between systems. 2. When receiving data in the NEC transmission format, check that the 32 bits made up of the 16-bit custom code (Custom Code, Custom Code’) and the 16-bit data code (Data Code, Data Code) are fully decoded, and that there are no signals with the 33rd bit and after (be sure to check also Data Code) ...

Page 6

... Standard versions with Ver I specs. ( PD6121-001, PD6122-001) * Each of the higher 8 bits of the custom code is set to “1” when a diode is connected between the CCS pin and the corresponding KI/O pin, and is set to “0” when no diode is connected pull-up resistor is connected to the KI/O pin corresponding to one of the lower 8 bits of the custom code’, the bit is first set to “1”. Based on the 1’ ...

Page 7

... The higher 8 bits of the custom code are determined by the diode connected to the CCS pin and KI/O pin. Set custom code The inversion/non-inversion of the lower 8 bits of the custom code’ is determined by the pull-up resistor connected to the KI/O pin. Set custom code When the above-described setting is done, the following custom code is output. ...

Page 8

... In Ver II not possible to set all custom codes. Also, new custom codes cannot be ordered for Ver II products; therefore, Ver I products should be used if new custom codes are required the higher 8 bits of the custom code is done by connecting the CCS pin 0 pins, as shown below. 7 ...

Page 9

... KI/O KI Connection of any one line and C of the higher 8 bits of the custom code are fixed by connecting the CCS pin to KI Therefore, in the configuration example, they become and C of the higher 8 bits of the custom code are selected and fixed by the pull-up resistor ...

Page 10

... As noted above, setting the pull-up resistor and connection, produces the following custom code. Custom code Higher 8 bits of custom code * Remark Codes are transmitted from the LSB. 10 Lower 8 bits of custom code’ ...

Page 11

... REMOTE OUTPUT WAVEFORM (NEC TRANSMISSION FORMAT: ONE-SHOT COMMAND TRANSMISSION MODE) • When f = 455 kHz OSC (1) Remote (REM) output (from stage 2 , transmission occurs only when key is kept depressed) REM output 58.5 to 76.5 ms 108 ms 1 (2) Magnification of stage 1 3 REM output 9 ms 4.5 ms 13.5 ms Leader Code ...

Page 12

... K52 * K53 * K54 * KI/O 5 K55 * K56 * K57 * K58 * KI/O 6 K59 * K60 * K61 * K62 * KI/O 7 K63 * K64 * Note Bit D is “0” when the SEL pin is connected DATA CODE 0 ...

Page 13

DOUBLE-INPUT OPERATION All keys are provided with a multiple-input prevention circuit. When two or more keys are pressed simulta- neously, no signal is transmitted; but when the keys K21 and K22, K21 and K23, or K21 and K24 are ...

Page 14

... A continuous command transmission mode for transmitting data a second or more times is also available. As shown in Figure 7- possible to continuously transmit commands for all the keys or for individual key output lines simply by adding a diode D and connecting this case, the average transmission current is larger than that in the one-shot command transmission mode. ...

Page 15

Figure 7-1. Continuous Command Transmission Mode (When f (1) PD6120C, 6121G, 6122G REM output 58.5 to 76.5 ms 108 ms LMP output (2) PD1913C, 1943G, 6102G ( ...

Page 16

Figure 7-2. Application Circuit for Continuous Command Transmission Mode 1 Continuous command transmission for all keys REM output is input to KI Ceramic resonator 455 kHz 220 pF OSCO OSCI CCS KI ...

Page 17

APPLICATION CIRCUIT EXAMPLE (1) Example application circuit using PD6121 Ceramic resonator 455 kHz OSCO OSCI V DD SEL µPD6121G-001 CCS (2) Example application circuit using PD6122 Ceramic resonator 455 kHz OSCO ...

Page 18

Application circuit example, receive side * PIN photo diode PH302C PH310 PH320 Note The PC2801A’s active level is high. 18 Preamplifier (amplification, waveform shaping) IN OUT Note µPC2800A, 2801A µPC2803 µPC2804 Shield case PD6121, 6122 Microcomputer Key input Display ...

Page 19

ELECTRICAL SPECIFICATIONS Absolute Maximum Ratings ( Parameter Supply voltage Input voltage Power dissipation Operating ambient temperature Storage temperature Recommended Operating Conditions (T Parameter Supply voltage Oscillation frequency Input voltage Custom code select pull-up resistor DC ...

Page 20

... Keep wiring as short as possible. • Do not cross other signal lines. Do not design wiring close to lines with large fluctuating current. • Make sure that the connection point of the oscillation circuit’s capacitor has the same potential • ...

Page 21

PACKAGE DRAWINGS (1) Package for the PD6121 20 PIN PLASTIC SOP (375 mil NOTE Each lead centerline is located within 0.12 mm (0.005 inch) of its true position (T.P.) at maximum material ...

Page 22

Package for the PD6122 * 24 PIN PLASTIC SOP (375 mil NOTE Each lead centerline is located within 0.12 mm (0.005 inch) of its true position (T.P.) at maximum material condition ...

Page 23

... The following conditions (see table below) must be met when soldering this product. For more details, refer to the NEC document SEMICONDUCTOR DEVICE MOUNTING TECHNOLOGY MANUAL (IEI-1207). Please consult an NEC sales representative in case an other soldering process is used case soldering is done under different conditions. Table 11-1. Soldering Conditions for Surface Mounting ...

Page 24

... Custom code Data code No. of keys Package Cautions 1. New custom codes are not available for the following standard products. PD6121G, 6122G Ver II standard products (-002 products other than listed in Caution 1 are used, please contact NEC for custom codes. 24 PD6121 V = 2 ...

Page 25

... Notes 1. Under development 2. This product’s pin configuration is the same as that of the 20-pin PD6133, 6134, and 6604, but the package is a 24-pin SOP shrink DIP package. Caution If using the NEC transmission format, please contact NEC for the custom code. PD6133 PD6134 ...

Page 26

... Operating frequency Power supply voltage Operating ambient temperature Charge/discharge function (NOP) Low voltage detector Package PROM version Caution If using the NEC transmission format, please contact NEC for the custom code. 26 PD6600 PD6600A PD6124 512 x 10 bits 1002 x 10 bits bits ...

Page 27

... Similar precautions need to be taken for PW boards with semiconductor devices on it. 2 HANDLING OF UNUSED INPUT PINS FOR CMOS Note: No connection for CMOS device inputs can be cause of malfunction connection is provided to the input pins possible that an internal input level may be generated due to noise, etc., hence causing malfunction. CMOS devices behave differently than Bipolar or NMOS devices ...

Page 28

... Specific: Aircrafts, aerospace equipment, submersible repeaters, nuclear reactor control systems, life support systems or medical equipment for life support, etc. The quality grade of NEC devices in “Standard“ unless otherwise specified in NEC's Data Sheets or Data Books. If customers intend to use NEC devices for applications other than those specified for Standard quality grade, they should contact NEC Sales Representative in advance ...

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