74HC4520; 74HCT4520

Dual 4-bit synchronous binary counter

The 74HC4520; 74HCT4520 are dual 4-bit internally synchronous binary counters with two clock inputs (nCP0 and nCP1). They have buffered outputs from all 4 bit positions (nQ0 to nQ3) and an asynchronous master reset input (nMR). The counter advances on the LOW-to-HIGH transition of nCP0 when nCP1 is HIGH. It also advances on the HIGH-to-LOW transition of nCP1 when nCP0 is LOW. Either nCP0 or nCP1 may be used as the clock input to the counter. The other clock input may be used as a clock enable input. A HIGH on nMR, resets the counter (nQ0 to nQ3 = LOW) independent of nCP0 and nCP1. Inputs include clamp diodes. It enables the use of current limiting resistors to interface inputs to voltages in excess of V_CC.

特性

Wide supply voltage range from 2.0 V to 6.0 V
CMOS low power dissipation
High noise immunity
Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
Complies with JEDEC standards:
- JESD8C (2.7 V to 3.6 V)
- JESD7A (2.0 V to 6.0 V)
Input levels:
- For 74HC4520: CMOS level
- For 74HCT4520: TTL level
ESD protection:
- HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V
- CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V
Specified from -40 °C to +85 °C and -40 °C to +125 °C

目标应用

Multistage synchronous counting
Multistage asynchronous counting
Frequency dividers

参数类型

Type number	Product status	V_CC (V)	Output drive capability (mA)	Logic switching levels	t_pd (ns)	Power dissipation considerations	T_amb (°C)	R_th(j-a) (K/W)	Ψ_th(j-top) (K/W)	R_th(j-c) (K/W)	Package name
74HC4520D	Production	2.0 - 6.0	± 5.2	CMOS	24	low	-40~125	65	1.0	22	SO16
74HC4520PW	Production	2.0 - 6.0	± 5.2	CMOS	24	low	-40~125	98	1.0	23.6	TSSOP16
74HCT4520D	Production	4.5 - 5.5	± 4	TTL	24	low	-40~125	62	1.0	19.7	SO16

封装

型号	封装	尺寸版本	回流焊/波峰焊	包装	状态	标示	可订购的器件编号，（订购码(12NC)）
74HC4520D	SO16 (SOT109-1)	SOT109-1	SO-SOJ-REFLOW SO-SOJ-WAVE	SOT109-1_118	Active	74HC4520D	74HC4520D,118 ( 9337 149 00118 )
74HC4520PW	TSSOP16 (SOT403-1)	SOT403-1	SSOP-TSSOP-VSO-WAVE	SOT403-1_118	Active	HC4520	74HC4520PW,118 ( 9351 891 30118 )
74HCT4520D	SO16 (SOT109-1)	SOT109-1	SO-SOJ-REFLOW SO-SOJ-WAVE	SOT109-1_118	Active	74HCT4520D	74HCT4520D,118 ( 9337 153 80118 )

下表中的版本已停产。参见表停产信息了解更多信息。

型号	封装	尺寸版本	回流焊/波峰焊	包装	状态	标示	可订购的器件编号，（订购码(12NC)）
74HC4520D	SO16 (SOT109-1)	SOT109-1	SO-SOJ-REFLOW SO-SOJ-WAVE	SOT109-1_112	Withdrawn / End-of-life	74HC4520D	74HC4520D,112 ( 9337 149 00112 )

停产信息

型号	可订购的器件编号，（订购码(12NC)）	最后一次购买日期	最后一次交货日期	替代产品
74HC4520D	933714900112	2021-12-31	2022-06-30	74HC4520D
74HC4520PW	935189130112	2021-12-31	2022-06-30	74HC4520PW
74HCT4520D	933715380112	2021-12-31	2022-06-30	74HCT4520D

环境信息

型号	可订购的器件编号	化学成分	无铅转换日期
74HC4520D	74HC4520D,118	74HC4520D	week 4, 2004
74HC4520PW	74HC4520PW,118	74HC4520PW	week 10, 2005
74HCT4520D	74HCT4520D,118	74HCT4520D	week 4, 2004

下表中的版本已停产。参见表停产信息了解更多信息。

型号	可订购的器件编号	化学成分	RoHS	RHF指示符	无铅转换日期
74HC4520D	74HC4520D,112	74HC4520D			week 4, 2004

品质及可靠性免责声明

文档 (9)

文件名称	标题	类型	日期
74HC_HCT4520	Dual 4-bit synchronous binary counter	Data sheet	2024-04-02
AN11044	Pin FMEA 74HC/74HCT family	Application note	2019-01-09
HCT_USER_GUIDE	HC/T User Guide	User manual	1997-10-31
SO-SOJ-WAVE	Footprint for wave soldering	Wave soldering	2009-10-08
SO-SOJ-REFLOW	Footprint for reflow soldering	Reflow soldering	2009-10-08
WAVE_BG-BD-1	Wave soldering profile	Wave soldering	2021-09-08
SOT109-1	plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.75 mm body	Package information	2023-11-07
SOT403-1	plastic, thin shrink small outline package; 16 leads; 5 mm x 4.4 mm x 1.2 mm body	Package information	2023-11-08
SSOP-TSSOP-VSO-WAVE	Footprint for wave soldering	Wave soldering	2009-10-08

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