SN74ABT162841 - 20-Bit Bus-Interface D-Type Latch | TI
料号： SN74ABT162841 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.5 | $2.50 |
| 10 | $2.2 | $22.00 |
| 100 | $1.8 | $180.00 |
| 500 | $1.5 | $750.00 |
| 1,000 | $1.2 | $1,200.00 |
SN74ABT162841 概述
A bus-interface D-type latch is a digital logic component that captures data on its D inputs when the latch enable (LE) signal is asserted, holding the data on its Q outputs until the next enable pulse. It is a fundamental building block in digital systems for temporary data storage, bus isolation, and signal synchronization. In the hierarchy of digital logic, it belongs to the category of latches, which are level-sensitive storage elements, as opposed to edge-triggered flip-flops. Latches are essential in microprocessor systems, memory interfaces, and data acquisition circuits where multiple data lines must be captured simultaneously.
Key features of the SN74ABT162841 include 3-state outputs that allow connection to a shared bus without contention, a flow-through architecture that simplifies PCB layout, and distributed VCC and GND pins that minimize high-speed switching noise. The device also supports hot insertion with Ioff and power-up 3-state, and its latch-up performance exceeds 500 mA per JEDEC standards. The EPIC-B BiCMOS design significantly reduces power dissipation compared to bipolar logic, making it suitable for high-density systems.
Technically, the SN74ABT162841 uses a BiCMOS process that combines the speed of bipolar transistors with the low power of CMOS. The outputs have equivalent 25-ohm series resistors, eliminating the need for external resistors in many applications. The device is characterized for operation from -40°C to 85°C, and it is RoHS compliant. The 3-state outputs are controlled by an output enable (OE) input, which places the outputs in a high-impedance state when asserted high, allowing multiple devices to share a bus.
Typical applications include memory address latching, data bus buffering in microprocessor systems, and interface circuits for industrial control and telecommunications equipment. The wide operating voltage range and high drive capability make it ideal for 5V systems that require robust signal integrity. The flow-through pinout aligns inputs and outputs on opposite sides, simplifying board routing and reducing crosstalk.
When designing with this device, ensure that the OE and LE inputs are properly driven to avoid bus contention. The 3-state outputs allow multiple latches to share a bus, but only one should be enabled at a time. Consider the propagation delay and setup/hold times when designing timing margins for high-speed applications.
直接替换替代料： SN74ABT162841 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
SN74ABT162841DLR
✅ 直接替换📋 参考替代料（不在目录中）
SN74ABT162841DGVR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
SN74ABT162841DL
✅ 直接替换📋 参考替代料（不在目录中）
74ABT162841DL
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
SN74ABT162841DGGR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
SN74ABT162841 最大额定值与电气特性
| Number of Channels | 2 |
| Number of Bits per Channel | 10 |
| Logic Family | ABT |
| 输出类型 | 3-State |
| Supply Voltage Range | 4.5 V to 5.5 V |
| Propagation Delay Time | 4.6 ns (typical) |
| 工作温度范围 | -40°C to 85°C |
| Package Type | 56-SSOP (DL), 56-TSSOP (DLR) |
| 安装类型 | Surface Mount |
| Latch Type | D-Type Transparent |
| Input Type | Noninverting |
| Output Ground Bounce | <0.8 V at VCC = 5 V, TA = 25°C |
| Latch-Up Performance | Exceeds 500 mA per JEDEC |
| RoHS 状态 | Compliant |
SN74ABT162841 引脚配置
| 引脚 1 | 1D1 — Data input 1 for channel 1 |
| 引脚 2 | 1D2 — Data input 2 for channel 1 |
| 引脚 3 | 1D3 — Data input 3 for channel 1 |
| 引脚 4 | 1D4 — Data input 4 for channel 1 |
| 引脚 5 | 1D5 — Data input 5 for channel 1 |
| 引脚 6 | 1D6 — Data input 6 for channel 1 |
| 引脚 7 | 1D7 — Data input 7 for channel 1 |
| 引脚 8 | 1D8 — Data input 8 for channel 1 |
| 引脚 9 | 1D9 — Data input 9 for channel 1 |
| 引脚 10 | 1D10 — Data input 10 for channel 1 |
| 引脚 11 | GND — Ground |
| 引脚 12 | 1LE — Latch enable for channel 1 |
| 引脚 13 | 1OE — Output enable for channel 1 (active low) |
| 引脚 14 | 1Q1 — Output 1 for channel 1 |
| 引脚 15 | 1Q2 — Output 2 for channel 1 |
| 引脚 16 | 1Q3 — Output 3 for channel 1 |
| 引脚 17 | 1Q4 — Output 4 for channel 1 |
| 引脚 18 | 1Q5 — Output 5 for channel 1 |
| 引脚 19 | 1Q6 — Output 6 for channel 1 |
| 引脚 20 | 1Q7 — Output 7 for channel 1 |
| 引脚 21 | 1Q8 — Output 8 for channel 1 |
| 引脚 22 | 1Q9 — Output 9 for channel 1 |
| 引脚 23 | 1Q10 — Output 10 for channel 1 |
| 引脚 24 | GND — Ground |
| 引脚 25 | 2D1 — Data input 1 for channel 2 |
| 引脚 26 | 2D2 — Data input 2 for channel 2 |
| 引脚 27 | 2D3 — Data input 3 for channel 2 |
| 引脚 28 | 2D4 — Data input 4 for channel 2 |
| 引脚 29 | 2D5 — Data input 5 for channel 2 |
| 引脚 30 | 2D6 — Data input 6 for channel 2 |
| 引脚 31 | 2D7 — Data input 7 for channel 2 |
| 引脚 32 | 2D8 — Data input 8 for channel 2 |
| 引脚 33 | 2D9 — Data input 9 for channel 2 |
| 引脚 34 | 2D10 — Data input 10 for channel 2 |
| 引脚 35 | GND — Ground |
| 引脚 36 | 2LE — Latch enable for channel 2 |
| 引脚 37 | 2OE — Output enable for channel 2 (active low) |
| 引脚 38 | 2Q1 — Output 1 for channel 2 |
| 引脚 39 | 2Q2 — Output 2 for channel 2 |
| 引脚 40 | 2Q3 — Output 3 for channel 2 |
| 引脚 41 | 2Q4 — Output 4 for channel 2 |
| 引脚 42 | 2Q5 — Output 5 for channel 2 |
| 引脚 43 | 2Q6 — Output 6 for channel 2 |
| 引脚 44 | 2Q7 — Output 7 for channel 2 |
| 引脚 45 | 2Q8 — Output 8 for channel 2 |
| 引脚 46 | 2Q9 — Output 9 for channel 2 |
| 引脚 47 | 2Q10 — Output 10 for channel 2 |
| 引脚 48 | GND — Ground |
| 引脚 49 | VCC — Power supply (5V) |
| 引脚 50 | VCC — Power supply (5V) |
| 引脚 51 | VCC — Power supply (5V) |
| 引脚 52 | VCC — Power supply (5V) |
| 引脚 53 | GND — Ground |
| 引脚 54 | GND — Ground |
| 引脚 55 | GND — Ground |
| 引脚 56 | GND — Ground |
典型应用
SN74ABT162841 适用于 6 应用s: Memory Address Latching, Data Bus Buffering, Industrial Control Interfaces, Telecommunications Equipment, Test and Measurement Equipment, Automotive Electronics.
Memory Address Latching
The SN74ABT162841 is used to latch address lines in microprocessor and memory systems. Its 20-bit width and 3-state outputs allow it to capture a full address bus and hold it stable during memory access cycles. The fast propagation delay of 4.6 ns ensures minimal timing skew, and the high drive capability handles the capacitive load of multiple memory devices. The flow-through architecture simplifies PCB routing, reducing signal crosstalk and improving signal integrity in high-speed designs.
推荐
Data Bus Buffering
In microprocessor systems, the SN74ABT162841 can buffer data buses, providing isolation and driving capability. Its 3-state outputs allow multiple devices to share the bus without contention, and the Ioff feature supports hot insertion. The device's low ground bounce (<0.8V) minimizes noise on the bus, ensuring reliable data transfer. With a 5V supply, it is compatible with legacy TTL logic levels, making it ideal for mixed-voltage systems.
推荐
Industrial Control Interfaces
The SN74ABT162841 is used in industrial control systems to interface between a controller and field devices. Its wide operating temperature range (-40°C to 85°C) and robust latch-up performance (>500 mA) make it suitable for harsh environments. The 3-state outputs allow multiple control modules to share a common bus, and the high drive capability ensures signals reach remote sensors and actuators without degradation. The device's flow-through pinout simplifies wiring in backplane designs.
推荐
Telecommunications Equipment
In telecommunications, the SN74ABT162841 is used for data latching in switching and routing equipment. Its high-speed operation (4.6 ns propagation delay) supports high-throughput data paths, and the 3-state outputs enable bus sharing in multi-line systems. The device's low power dissipation, thanks to BiCMOS technology, is critical in densely populated equipment racks. The hot insertion capability allows line cards to be replaced without powering down the system, improving serviceability.
推荐
Test and Measurement Equipment
The SN74ABT162841 is used in test and measurement instruments to capture digital signals for analysis. Its 20-bit width allows simultaneous sampling of multiple channels, and the 3-state outputs enable connection to a shared data acquisition bus. The device's high drive capability ensures signals are transmitted accurately over long cables, and the low ground bounce preserves signal integrity. The flow-through architecture simplifies PCB design in compact instruments.
推荐
Automotive Electronics
The SN74ABT162841 is used in automotive electronics for body control modules and infotainment systems. Its wide temperature range and robust latch-up performance meet automotive requirements. The 3-state outputs allow multiple ECUs to share a bus, and the low power dissipation reduces heat in the cabin. The device's hot insertion capability is useful for diagnostic and programming interfaces. However, for AEC-Q100 qualified parts, consider the SN74ABT162841-Q1 variant if available.
推荐
推荐产品汇总
工程参考数据： SN74ABT162841 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | SN74ABT162841DLR | SN74ABT162841DGVR | 74ABT162841DL |
|---|---|---|---|---|
| Package | 56-SSOP (DL) | 56-TSSOP (DLR) | 56-TVSOP (DGV) | 56-SSOP (DL) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | NXP Semiconductors |
| Number of Bits | 20 | 20 | 20 | 20 |
| Supply Voltage | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V |
| Output Type | 3-State | 3-State | 3-State | 3-State |
| Operating Temperature | -40°C to 85°C | -40°C to 85°C | -40°C to 85°C | -40°C to 85°C |
| RoHS | Compliant | Compliant | Compliant | Compliant |
关键差异点
- 20-bit width in a single package （对比 SN74ABT162245 (16-bit transceiver))
- Flow-through architecture （对比 SN74ABT162841DLR (TSSOP))
- Hot insertion support （对比 74ABT162841DL (NXP))
设计说明
The SN74ABT162841 has a flow-through architecture with inputs on one side and outputs on the other, which simplifies PCB layout. Use a 0.1uF decoupling capacitor near each VCC pin (pins 49-52) and connect all GND pins (11, 24, 35, 48, 53-56) to a solid ground plane. Keep traces short to minimize inductance and reduce ground bounce.
The outputs have equivalent 25-ohm series resistors, which help match impedance and reduce ringing. For long traces or high capacitive loads, consider adding external series resistors if needed. The device's low ground bounce (<0.8V) helps maintain signal integrity, but proper termination is still recommended for high-speed signals.
Ensure that the OE (output enable) inputs are not left floating; tie them to GND to enable outputs or to VCC to disable. The LE (latch enable) inputs should be driven with clean signals to avoid unintended latching. Also, do not exceed the absolute maximum ratings, and ensure the supply voltage is within 4.5V to 5.5V to avoid damage.
合规信息
RoHS compliant per TI product page. Not AEC-Q100 qualified; for automotive, consider SN74ABT162841-Q1 if available.
