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HT9302G Dataheets PDF



Part Number HT9302G
Manufacturers Holtek Semiconductor Inc
Logo Holtek Semiconductor Inc
Description 1-Memory/2-Memory Tone/Pulse Dialer
Datasheet HT9302G DatasheetHT9302G Datasheet (PDF)

HT9302 Series 1-Memory/2-Memory Tone/Pulse Dialer Features · Universal specification · Operating voltage: 2.0V~5.5V · Low standby current · Low memory retention current: 0.1mA (typ.) · Tone/pulse switchable · Interface with LCD driver · 32 digits for redialing · 32 digits for SA memory dialing · One-key redialing · Pause and P®T key for PBX · 4´4 keyboard matrix · 3.58MHz crystal or ceramic resonator Patent Number: 64097, 86474, 64529, 113235 (R.O.C.) 5424740 (U.S.A.) · Hand-free control · Hold.

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HT9302 Series 1-Memory/2-Memory Tone/Pulse Dialer Features · Universal specification · Operating voltage: 2.0V~5.5V · Low standby current · Low memory retention current: 0.1mA (typ.) · Tone/pulse switchable · Interface with LCD driver · 32 digits for redialing · 32 digits for SA memory dialing · One-key redialing · Pause and P®T key for PBX · 4´4 keyboard matrix · 3.58MHz crystal or ceramic resonator Patent Number: 64097, 86474, 64529, 113235 (R.O.C.) 5424740 (U.S.A.) · Hand-free control · Hold-line control · Pause, P®T can be saved for redialing · Lock function · Resistor options - M/B ratio - Flash function and flash time - Pause and P®T duration - Pulse number · HT9302A: 18-pin DIP package HT9302B: 22-pin SKDIP package HT9302C: 20-pin DIP package HT9302D: 24-pin SKDIP package HT9302G: 16-pin DIP package General Description The HT9302 series tone/pulse dialers are CMOS LSIs for telecommunication systems. They are designed to meet various dialing specifications through resistor option matrix. The HT9302 series provide the pin-selected lock function, Hold-line, Hand-free and LCD dialing number display interface, all of which are suitable for feature phone applications. HT9302G is simpler than HT9302X version. It provides only a redialing memory for simple low-cost system applications. Selection Table Function Part No. HT9302x HT9302A HT9302B HT9302C HT9302D HT9302G HT9302G ¾ ¾ Ö Ö Ö Ö ¾ Ö ¾ Ö Lock Function (Pin Selection) Hold Line Hand Free (Normal version) ¾ Ö ¾ Ö (Simple version) ¾ ¾ 16 DIP ¾ ¾ Ö Ö 18 DIP 22 SKDIP 20 DIP 24 SKDIP LCD Interface Package Rev. 1.20 1 September 30, 2002 HT9302 Series Block Diagram C 1 K e y C o lu m n C 4 . S M C o n tro l C h e c k D O U T C L O C K T o n e O u t P u ls e O u t D T M . P O X M U T E K e y . u n c tio n E n c o d e r W R M C o u n te r A D D R L S R A M T o n e E n c o d e r C o n v e rte r R 1 K e y R o w R 4 E n c o d e r . la s h D e b o u n c e C lo c k C o n tro l M o d e In H D /H . H K S H . I H D I H D O H . O T im e r K e y to n e G e n e ra to r L O C K M O D E X 1 X 2 D iv id e r C lo c k G e n e ra to r M /B Pin Assignment HT9302x normal version H D I H D I C 1 C 1 1 2 3 4 5 6 7 8 9 C 2 C 3 C 4 L O C K X 1 X 2 X M U T E V S S 1 8 1 7 1 6 1 5 1 4 1 3 1 2 1 1 1 0 R 4 R 3 R 2 R 1 M O D E D T M . P O H K S V D D C 2 C 3 C 4 L O C K X 1 X 2 X M U T E V S S H . I 9 1 0 1 1 8 7 6 5 4 3 2 1 2 2 2 1 2 0 1 9 1 8 1 7 1 6 1 5 1 4 1 3 1 2 H D O R 4 R 3 R 2 R 1 M O D E D T M . P O H K S V D D H . O C 1 1 2 3 4 5 6 7 8 9 1 0 C 2 C 3 C 4 L O C K X 1 X 2 X M U T E V S S D O U T 2 0 1 9 1 8 1 7 1 6 1 5 1 4 1 3 1 2 1 1 R 4 R 3 R 2 R 1 M O D E D T M . P O H K S V D D C L O C K C 1 C 2 C 3 C 4 L O C K X 1 X 2 X M U T E V S S H . I D O U T 9 1 0 1 1 1 2 8 7 6 5 4 3 2 1 2 4 2 3 2 2 2 1 2 0 1 9 1 8 1 7 1 6 1 5 1 4 1 3 H D O R 4 R 3 R 2 R 1 M O D E D T M . P O H K S V D D H . O C L O C K H T 9 3 0 2 A 1 8 D IP -A H T 9 3 0 2 B 2 2 S K D IP -A H T 9 3 0 2 C 2 0 D IP -A H T 9 3 0 2 D 2 4 S K D IP -A HT9302G simple version C 1 1 2 3 4 5 6 7 8 C 2 C 3 X 1 X 2 X M U T E V S S V D D 1 6 1 5 1 4 1 3 1 2 1 1 1 0 9 R 4 R 3 R 2 R 1 M O D E D T M . P O H K S H T 9 3 0 2 G 1 6 D IP -A Rev. 1.20 2 September 30, 2002 HT9302 Series Keyboard Information H T 9 3 0 2 A /B /C /D C 1 R 1 R 2 R 3 R 4 7 * /T 0 4 8 # 1 5 9 R C 2 2 6 P C 3 3 C 4 S A . R 1 R 2 R 3 R 4 7 * /T 0 4 8 # R H T 9 3 0 2 G C 1 1 5 9 P C 2 2 6 . C 3 3 H K S Pin Description Pin Name I/O Internal Connection Description C1~C4 R1~R4 These pins form a 4´4 keyboard matrix which can perform keyboard input detection and dialing specification setting functions. When on-hook (HKS=high) all the pins are set high. While off-hook the column group (C1~C4) remains low and the row group (R1~R4) is set high for key input detection. An inexpensive single contact 4´4 keyboard can be used as an input device. I/O CMOS IN/OUT Pressing a key connects a single column to a single row, and actuates the system oscillator that results in a dialing signal output. If more than two keys are pressed at the same time, no response occurs. The key-in debounce time is 20ms. Refer to the keyboard information for keyboard arrangement and to the functional description for dialing specification selection. I The system oscillator consists of an inverter, a bias resistor and the necessary load capacitor on chip. Connecting a standard 3.579545MHz crystal or ceramic OSCILLATOR resonator to the X1 and X2 terminals can implement the oscillator function. The oscillator is turned off in the standby mode, and is actuated whenever a keyboard entry is detected. NMOS OUT XMUTE is an NMOS open drain structure pulled to VSS during dialing signal transmission. Otherwise, it is an open circuit. The XMUTE is used to mute the speech circuit when transmitting the dial signal. This pin is used to monitor the status of the hook-switch and its combination with HFI/HDI can control the PO pin output to make or break the line. HKS=VDD: On-hook .


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