{"id":609,"date":"2025-08-11T07:35:05","date_gmt":"2025-08-11T07:35:05","guid":{"rendered":"https:\/\/www.fairply.com\/blog\/?post_type=product&#038;p=609"},"modified":"2025-09-08T10:36:22","modified_gmt":"2025-09-08T02:36:22","slug":"holtek-ht9170ddtmf-receiver","status":"publish","type":"product","link":"https:\/\/www.fairply.com\/blog\/product\/holtek-ht9170ddtmf-receiver\/","title":{"rendered":"HOLTEK HT9170D(DTMF Receiver)"},"content":{"rendered":"<p><span style=\"color: #0000ff;\">\u5ee0\u724c: HOLTEK<\/span><br \/>\n<span style=\"color: #0000ff;\">\u7522\u5730: \u53f0\u7063<\/span><br \/>\n<span style=\"color: #0000ff;\">\u5c01\u88dd\u6a23\u5f0f: 18-PIN SOP\u00a0 \/\u00a0 <\/span><span style=\"color: #0000ff;\">\u5305\u88dd: \u7ba1\u88dd<\/span><br \/>\n<strong><span style=\"color: #0000ff;\">General Description<\/span><\/strong><br \/>\nThe HT9170B\/D are Dual Tone Multi Frequency (DTMF) receivers integrated with digital decoder and bandsplit filter functions as well as power-down mode and inhibit mode operations. Such devices use digital counting techniques to detect and decode all the 16 DTMF tone pairs into a 4-bit code output.<br \/>\nHighly accurate switched capacitor filters are imple-mented to divide tone signals into low and high group signals. A built-in dial tone rejection circuit is provided to eliminate the need for pre-filtering.<\/p>\n<hr \/>\n<style id=\"wpforms-css-vars-765\">\n\t\t\t\t#wpforms-765 {\n\t\t\t\t--wpforms-container-padding: 0px;\n--wpforms-container-border-width: 1px;\n--wpforms-container-border-radius: 3px;\n--wpforms-background-color: rgba(0, 0, 0, 0);\n--wpforms-field-size-input-height: 43px;\n--wpforms-field-size-input-spacing: 15px;\n--wpforms-field-size-font-size: 16px;\n--wpforms-field-size-line-height: 19px;\n--wpforms-field-size-padding-h: 14px;\n--wpforms-field-size-checkbox-size: 16px;\n--wpforms-field-size-sublabel-spacing: 5px;\n--wpforms-field-size-icon-size: 1;\n--wpforms-label-size-font-size: 16px;\n--wpforms-label-size-line-height: 19px;\n--wpforms-label-size-sublabel-font-size: 14px;\n--wpforms-label-size-sublabel-line-height: 17px;\n--wpforms-button-size-font-size: 17px;\n--wpforms-button-size-height: 41px;\n--wpforms-button-size-padding-h: 15px;\n--wpforms-button-size-margin-top: 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wpforms-field-required\" name=\"wpforms[fields][3]\" aria-errormessage=\"wpforms-765-field_3-error\" required><\/textarea><\/div><script>\n\t\t\t\t( function() {\n\t\t\t\t\tconst style = document.createElement( 'style' );\n\t\t\t\t\tstyle.appendChild( document.createTextNode( '#wpforms-765-field_4-container { position: absolute !important; overflow: hidden !important; display: inline !important; height: 1px !important; width: 1px !important; z-index: -1000 !important; padding: 0 !important; } #wpforms-765-field_4-container input { visibility: hidden; } #wpforms-conversational-form-page #wpforms-765-field_4-container label { counter-increment: none; }' ) );\n\t\t\t\t\tdocument.head.appendChild( style );\n\t\t\t\t\tdocument.currentScript?.remove();\n\t\t\t\t} )();\n\t\t\t<\/script><\/div><!-- .wpforms-field-container --><div class=\"wpforms-submit-container\" ><input type=\"hidden\" name=\"wpforms[id]\" value=\"765\"><input type=\"hidden\" name=\"page_title\" value=\"\"><input type=\"hidden\" name=\"page_url\" value=\"https:\/\/www.fairply.com\/blog\/wp-json\/wp\/v2\/product\/609\"><input type=\"hidden\" name=\"url_referer\" value=\"\"><button type=\"submit\" name=\"wpforms[submit]\" id=\"wpforms-submit-765\" class=\"wpforms-submit\" data-alt-text=\"Sending...\" data-submit-text=\"\u9001\u51fa(Submit)\" aria-live=\"assertive\" value=\"wpforms-submit\">\u9001\u51fa(Submit)<\/button><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.fairply.com\/blog\/wp-content\/plugins\/wpforms-lite\/assets\/images\/submit-spin.svg\" class=\"wpforms-submit-spinner\" style=\"display: none;\" width=\"26\" height=\"26\" alt=\"Loading\"><\/div><\/form><\/div>  <!-- .wpforms-container -->\n","protected":false},"excerpt":{"rendered":"<p><span style=\"color: #0000ff;\">HOLTEK HT9170D(DTMF Receiver)<\/span><\/p>\n<p><span style=\"color: #0000ff;\"><strong>\u4ecb\u7d39<\/strong><\/span><br \/>\nFeatures<br \/>\n\u25cf Operating voltage: 2.5V~5.5V<br \/>\n\u25cf Minimal external components<br \/>\n\u25cf No external filter is required<br \/>\n\u25cf Low standby current (on power down mode)<br \/>\n\u25cf Excellent performance<br \/>\n\u25cf Tristate data output for MCU interface<br \/>\n\u25cf 3.58MHz crystal or ceramic resonator<br \/>\n\u25cf 1633Hz can be inhibited by the INH pin<br \/>\n\u25cf HT9170D: 18-pin SOP package<\/p>\n","protected":false},"featured_media":612,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[44],"product_cat":[45],"product_tag":[],"class_list":{"0":"post-609","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-44","7":"product_cat-ic","9":"first","10":"instock","11":"taxable","12":"shipping-taxable","13":"product-type-simple"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>HOLTEK HT9170D(DTMF Receiver) - FAIRPLY ENTERPRISES INC.<\/title>\n<meta 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