component
SD2057
Public Made by Adomby adom
Hangzhou SDIC Microelectronics Interface - Specialized, QFN-24-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
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"type": "component",
"slug": "sd2057",
"title": "SD2057",
"brief": "Hangzhou SDIC Microelectronics Interface - Specialized, QFN-24-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.0",
"license": "CC-BY-SA-4.0",
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"interface",
"sd2057",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "SD2057",
"manufacturer": "Hangzhou SDIC Microelectronics",
"package": "QFN-24-EP(4x4)",
"pin_count": 25,
"category": "Interface",
"subcategory": "Interface - Specialized",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588884631110225920",
"parts": {
"symbol": "sd2057.kicad_sym",
"footprint": "sd2057.kicad_mod",
"model_3d": "sd2057-hero.glb",
"model_3d_plain": "sd2057-etched.glb",
"model_3d_step": "sd2057-etched.step",
"model_3d_step_plain": "sd2057.step",
"lbr": "sd2057.lbr"
},
"distributor_links": {
"lcsc": "C414104"
},
"distributor_check": {
"checked_at": "2026-10-18T01:37:38Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "no match"
},
"mouser": {
"pn": null,
"status": "no match"
}
},
"pins": [
{
"number": "1",
"name": "XTAL_ENb",
"type": "input",
"description": "Active-low crystal oscillator enable that, together with CLK_CFG0/CLK_CFG1, selects the clock configuration per Table 2."
},
{
"number": "2",
"name": "CLKOUT",
"type": "output",
"description": "Clock output at the DVDD logic level, selectable per Table 2; driving its load adds supply current (I = C×V×f), so the load should be kept small."
},
{
"number": "3",
"name": "CLK_CFG0",
"type": "input",
"description": "Clock configuration control input that selects the system clock and CLKOUT mode per Table 2."
},
{
"number": "4",
"name": "CLK_CFG1",
"type": "input",
"description": "Clock configuration control input that selects the system clock and CLKOUT mode per Table 2."
},
{
"number": "5",
"name": "RESETb",
"type": "input",
"description": "Active-low chip reset; when low the device enters power-save mode with maximum 5 µA consumption, and it may be tied to DVDD if reset is not used."
},
{
"number": "6",
"name": "CD",
"type": "output",
"description": "Carrier detect output that is high when a valid carrier is present on HART_IN."
},
{
"number": "7",
"name": "TXD",
"type": "input",
"description": "Transmit data NRZ input to the modulator, whose modulated output is sent on HART_OUT."
},
{
"number": "8",
"name": "RTSb",
"type": "input",
"description": "Active-low request-to-send that enables the modulator and disables the demodulator (transmit mode); high enables the demodulator and disables the modulator (receive mode)."
},
{
"number": "9",
"name": "DUPLEX",
"type": "input",
"description": "Active-high full-duplex enable; with RTSb low it enables simultaneous modulator and demodulator operation for loopback self-test."
},
{
"number": "10",
"name": "RXD",
"type": "output",
"description": "Demodulated HART data output sent to the external UART."
},
{
"number": "11",
"name": "DVDD",
"type": "power_in",
"description": "Digital supply, which must be the same voltage as AVDD (2.7 to 5.5 V); decouple with parallel 1 µF and 0.1 µF low-ESR capacitors."
},
{
"number": "12",
"name": "DVSS",
"type": "power_in",
"description": "Digital ground that must be connected to AVSS."
},
{
"number": "13",
"name": "REG_CAP",
"type": "output",
"description": "Output of the internal LDO (about 2 V) supplying the digital core; decouple with a 1 µF ceramic capacitor to DVSS."
},
{
"number": "14",
"name": "HART_OUT",
"type": "output",
"description": "HART FSK output to the 4-20 mA loop with 0.75 V DC level and 0.5-1.0 V swing; use 4.7 nF to 68 nF capacitive load, and maximum resistive load is 160 Ω."
},
{
"number": "15",
"name": "REF",
"type": "bidirectional",
"description": "Internal 1.5 V reference output, or external 2.5 V reference input when REF_EN is low; decouple with 1 µF to AVSS."
},
{
"number": "16",
"name": "HART_IN",
"type": "input",
"description": "HART FSK input from the 4-20 mA loop with an input range of 0 to 1.5 V when the internal reference is used."
},
{
"number": "17",
"name": "ADC_IP",
"type": "input",
"description": "ADC input fed from an external bandpass filter output; when the internal filter is used, connect a 680 pF capacitor to AVSS."
},
{
"number": "18",
"name": "AVDD",
"type": "power_in",
"description": "Analog supply (2.7 to 5.5 V) that must match DVDD; decouple with parallel 1 µF and 0.1 µF low-ESR capacitors."
},
{
"number": "19",
"name": "AVSS",
"type": "power_in",
"description": "Analog ground."
},
{
"number": "20",
"name": "XTAL2",
"type": "output",
"description": "Crystal connection for the external 3.6864 MHz crystal; leave open when an external CMOS clock is applied to XTAL1."
},
{
"number": "21",
"name": "XTAL1",
"type": "input",
"description": "Crystal connection for the 3.6864 MHz oscillator or external CMOS clock input."
},
{
"number": "22",
"name": "DVSS",
"type": "power_in",
"description": "Digital ground that must be connected to AVSS."
},
{
"number": "23",
"name": "REF_EN",
"type": "input",
"description": "Reference enable; high enables the internal 1.5 V reference and buffer, low disables them and requires an external 2.5 V buffered reference on REF."
},
{
"number": "24",
"name": "FILTER_SEL",
"type": "input",
"description": "Bandpass filter select; high enables the internal filter with HART signal on HART_IN, low disables it and requires an external filter output on ADC_IP."
},
{
"number": "25",
"name": "EP",
"type": "passive",
"description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
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"extractor": "extract_pins 0.3",
"primary_model": "claude-haiku-5-5",
"primary_mode": "text",
"consensus_model": "claude-sonnet-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: The pin-number mapping was taken from the Table 1 pin description (序号 column). The text extraction o; The datasheet lists REF as an analog output, but it also accepts an external 2.5 V reference input w; XTAL2 is described as an analog output (crystal pin) that is left floating with an external clock; t",
"exposed pad 25 added from the footprint",
"dropped thermal pad ['EP'] absent from footprint",
"1/25 pin names appear NOWHERE in the datasheet text: ['21:XTAL1@p2']"
],
"pages_sent": 12,
"cost_usd": 0.0736,
"at": "2026-10-18T01:35:43"
},
"datasheet": {
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"pages": 12,
"sha256": "3d7981dffd44edac",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
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"described": 25,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
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"footprint": "viewers/footprint.html"
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{
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]
},
"metadata": {
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"Package": "QFN-24-EP(4x4)",
"Category": "Interface",
"Pins": "25"
},
"characteristics": {
"version": 1,
"source": "datasheet",
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"rows": [
{
"name": "工作温度 TA",
"symbol": "TA",
"kind": "absolute_maximum",
"unit": "℃",
"min": -55,
"typ": null,
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{
"name": "储存温度 TS",
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{
"name": "模拟供电电压 AVDD 至 AVSS",
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{
"name": "数字供电电压 DVDD 至 DVSS",
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{
"name": "模拟数字电源地 AVSS 至 DVSS",
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"min": -0.3,
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{
"name": "模拟端口偏压 模拟输入至 AVSS",
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"source_page": 8,
"source": "datasheet"
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{
"name": "封装热阻 θJA",
"symbol": "θJA",
"kind": "thermal",
"unit": "℃/W",
"min": null,
"typ": null,
"max": 50,
"conditions": "",
"source_page": 8,
"source": "datasheet"
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{
"name": "ESD 人体模型",
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"min": 4000,
"typ": null,
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"source_page": 8,
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{
"name": "ESD 机械模型",
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"min": 400,
"typ": null,
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"source_page": 8,
"source": "datasheet"
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{
"name": "电源电压",
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"min": 2.7,
"typ": 3.3,
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"conditions": "",
"source_page": 8,
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{
"name": "功耗解调模式 IDD1",
"symbol": "IDD1",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": 113,
"max": 148,
"conditions": "外部时钟、-55℃至+85℃",
"source_page": 8,
"source": "datasheet"
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{
"name": "功耗解调模式 IDD1",
"symbol": "IDD1",
"kind": "electrical",
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"typ": null,
"max": 168,
"conditions": "外部时钟、-55℃至+125℃",
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"source": "datasheet"
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"name": "功耗解调模式 IDD1 (外部基准)",
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"conditions": "外部时钟、-55℃至+85℃、外部基准电压源",
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{
"name": "功耗解调模式 IDD1 (外部基准)",
"symbol": "IDD1",
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"min": null,
"typ": null,
"max": 141,
"conditions": "外部时钟、-55℃至+125℃、外部基准电压源",
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"source": "datasheet"
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{
"name": "功耗调制模式 IDD1",
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"typ": 76,
"max": 97,
"conditions": "外部时钟、-55℃至+85℃",
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"source": "datasheet"
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{
"name": "功耗调制模式 IDD1",
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"typ": null,
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"conditions": "外部时钟、-55℃至+125℃",
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"name": "功耗调制模式 IDD1 (外部基准)",
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"kind": "electrical",
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"min": null,
"typ": 56,
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"conditions": "外部时钟、-55℃至+85℃、外部基准电压源",
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{
"name": "功耗调制模式 IDD1 (外部基准)",
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"kind": "electrical",
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"min": null,
"typ": null,
"max": 92,
"conditions": "外部时钟、-55℃至+125℃、外部基准电压源",
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{
"name": "省电模式功耗",
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"min": null,
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"max": 5,
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{
"name": "晶振功耗",
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"unit": "µA",
"min": null,
"typ": 45,
"max": 90,
"conditions": "外部晶振、XTAL1/2 各接 8pF 负载",
"source_page": 8,
"source": "datasheet"
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{
"name": "内部 VREF 初始精度",
"symbol": "",
"kind": "electrical",
"unit": "V",
"min": 1.48,
"typ": 1.5,
"max": 1.52,
"conditions": "REF_EN = DVDD",
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{
"name": "外部 VREF 初始精度",
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"conditions": "REF_EN = DVSS",
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"source": "datasheet"
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{
"name": "外部 VREF 输入电流 解调模式",
"symbol": "IREF",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": 3.4,
"max": 5,
"conditions": "解调模式",
"source_page": 8,
"source": "datasheet"
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{
"name": "外部 VREF 输入电流 调制模式",
"symbol": "IREF",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": 2.7,
"max": 4,
"conditions": "调制模式",
"source_page": 8,
"source": "datasheet"
},
{
"name": "载波有效幅度",
"symbol": "",
"kind": "electrical",
"unit": "mVp-p",
"min": 90,
"typ": 105,
"max": 115,
"conditions": "",
"source_page": 9,
"source": "datasheet"
},
{
"name": "HART_IN 输入范围 (外部基准)",
"symbol": "",
"kind": "electrical",
"unit": "V",
"min": 0,
"typ": null,
"max": null,
"conditions": "使用外部基准电压条件下，最大值印刷为 REF",
"source_page": 9,
"source": "datasheet"
},
{
"name": "HART_IN 输入范围 (内部基准)",
"symbol": "",
"kind": "electrical",
"unit": "V",
"min": 0,
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"conditions": "使用内部基准电压条件下",
"source_page": 9,
"source": "datasheet"
},
{
"name": "HART_OUT 输出幅度",
"symbol": "",
"kind": "electrical",
"unit": "mVp-p",
"min": 465,
"typ": 500,
"max": 518,
"conditions": "HART_OUT，负载如图 4 所示",
"source_page": 9,
"source": "datasheet"
},
{
"name": "相位连续性误差",
"symbol": "",
"kind": "electrical",
"unit": "度",
"min": null,
"typ": null,
"max": 0,
"conditions": "",
"source_page": 9,
"source": "datasheet"
},
{
"name": "数字输入高电平电流 IIH",
"symbol": "IIH",
"kind": "electrical",
"unit": "µA",
"min": -0.1,
"typ": null,
"max": 0.1,
"conditions": "",
"source_page": 9,
"source": "datasheet"
},
{
"name": "数字输入低电平电流 IIL",
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"kind": "electrical",
"unit": "µA",
"min": -0.1,
"typ": null,
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"source": "datasheet"
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{
"name": "外部时钟频率精度 (3.6864MHz)",
"symbol": "",
"kind": "electrical",
"unit": "MHz",
"min": 3.6496,
"typ": 3.6864,
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{
"name": "外部时钟频率精度 (1.2288MHz)",
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"kind": "electrical",
"unit": "MHz",
"min": 1.2165,
"typ": 1.2288,
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},
{
"name": "载波起始时间 t1",
"symbol": "t1",
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