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CD4070BE

Quad 2-input XOR gate, CMOS 3-18V, 60ns, PDIP-14

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制造商零件：

CD4070BE

包装：

PDIP-14 (19.3 x 6.35 x 4.57mm, 2.54mm pitch, through-hole)

品牌：

产品类别：

集成电路 IC, 接口集成电路

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说明

产品概览

The CD4070BE from Texas Instruments contains four independent 2-input Exclusive-OR (XOR) gates in a 14-pin PDIP package, implementing the ‘difference detection’ function across the 3V-18V CMOS supply range.

主要规格

Number of Gates	4 (quad 2-input XOR)
Technology	CD4000B CMOS
电源电压	3V to 18V
传播延迟	60ns typical @ VDD=10V
静态电流	0.01µA typical @ 25°C
工作温度	-55°C to +125°C
包装	PDIP-14 (19.3 x 6.35mm)

特点

Quad 2-input XOR gates
Wide supply voltage: 3V to 18V
Output HIGH when inputs differ
Near-zero quiescent current

应用

Parity generation/checking
Binary addition (sum bit)
Comparison (inequality detection)
Controlled inversion

产品介绍：CD4070BE 产品介绍

The CD4070BE from Texas Instruments contains four independent 2-input Exclusive-OR (XOR) gates. The XOR output is HIGH when the two inputs are different (one HIGH, one LOW) and LOW when both inputs are the same (both HIGH or both LOW). This ‘difference detection’ property makes the XOR gate uniquely valuable: in parity checking, XOR cascades detect whether an odd number of bits have changed; in binary addition, the XOR produces the sum bit (without carry); in comparison, XOR detects inequality between two signals; in controlled inversion, one input selects whether the other input is passed or inverted. The CD4070 is the CMOS equivalent of the TTL 7486 with the advantage of 3V-18V supply range. The BE suffix denotes the PDIP-14 package.

工作原理：CD4070BE 工作原理

Each XOR gate in the CD4070BE performs Y = A ⊕ B. The output is HIGH when A and B have different logic levels, and LOW when they are the same. Truth table: (0,0)→0; (0,1)→1; (1,0)→1; (1,1)→0. Equivalently: Y = A·B’ + A’·B = (A+B)·(A’+B’)’. For controlled inversion: if input B=0, then Y=A (pass); if B=1, then Y=A’ (invert). This makes the XOR a programmable inverter: one input controls whether the other is inverted or passed through. For parity generation: cascade all data bits through XOR gates; the final output is 1 if an odd number of input bits are 1 (odd parity). For binary addition: the XOR of two bits gives the sum bit without carry (half-adder sum); adding an AND gate for the carry completes the half-adder. For comparison: XOR of two bits → 0 if equal, 1 if different; OR all XOR outputs → 0 only if all bits match.

引脚说明：CD4070BE 引脚定义和功能

针脚	名称	类型	说明
1	1A	输入	Gate 1 input A
2	1B	输入	Gate 1 input B
3	1Y	输出	Gate 1 output (A XOR B)
4	2Y	输出	Gate 2 output (A XOR B)
5	2A	输入	Gate 2 input A
6	2B	输入	Gate 2 input B
7	VSS	电源	地面
8	3A	输入	Gate 3 input A
9	3B	输入	Gate 3 input B
10	3Y	输出	Gate 3 output (A XOR B)
11	4Y	输出	Gate 4 output (A XOR B)
12	4A	输入	Gate 4 input A
13	4B	输入	Gate 4 input B
14	VDD	电源	Supply (3V to 18V)

Application Scenarios:In which products and applications isCD4070BE 中古

Parity Generator: 4 data bits → 4 XOR gates cascaded; output = 1 if odd number of bits are 1 (odd parity bit)
Controlled Inverter: Data on A; control on B; Y = A when B=0; Y = A’ when B=1; programmable inversion
Comparison: Two 4-bit numbers bit-by-bit into XOR gates; OR all outputs; result = 0 if equal, 1 if any bit differs
Half Adder: XOR for sum bit (A⊕B); AND gate for carry (A·B); 1 bit of binary addition

Alternative Models:What chips are recommended as replacements for CD4070BE

模型	制造商	主要区别	包装	Supply
CD4070BM	TI	SOIC-14 surface-mount version with identical logic function and 3-18V range	SOIC-14	3-18V
CD4070BE	TI	Through-hole DIP version for prototyping and legacy board repair	DIP-14	3-18V
HEF4070BT	恩智浦	Pin-compatible CMOS version with improved ESD protection and 3-15V supply	SOIC-14	3-15V
MC144070BDR2G	onsemi	Pin-compatible equivalent with RoHS compliance and AEC-Q100 automotive option	SOIC-14	3-18V
74HC86D	TI/Nexperia	HC CMOS version with higher speed and 2-6V supply for modern logic systems	SOIC-14	2-6V
74HC86N	TI/Nexperia	HC CMOS through-hole version for prototyping with 2-6V supply range	DIP-14	2-6V
74HCT86D	Nexperia	HCT version with TTL-compatible inputs for mixed 5V TTL/CMOS systems	SOIC-14	4.5-5.5V

CD4070 is the CMOS 4000-series quad 2-input exclusive-or gate operating over the wide 3-18V supply range. The HEF4070 (NXP) and MC144070 (onsemi) are direct pin-compatible equivalents. For higher speed at the cost of narrower voltage range, the 74HC86 HC/HCT families offer significantly faster propagation delay and lower power consumption at 2-6V. Surface-mount versions use the BM/M suffix (SOIC); through-hole versions use the BE suffix (DIP).

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