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参数资料
| 型号： | SN74ALS528DWR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 算术逻辑单元 |
| 英文描述： | ALS SERIES, 12-BIT IDENTITY COMPARATOR, INVERTED OUTPUT, PDSO16 |
| 封装： | PLASTIC, SOIC-16 |
| 文件页数： | 2/7页 |
| 文件大小： | 104K |
| 代理商： | SN74ALS528DWR |
SN54ALS526, SN54ALS527, SN54ALS528
SN74ALS526, SN74ALS527, SN74ALS528
FUSEPROGRAMMABLE IDENTITY COMPARATORS
SDAS051A JUNE 1984REVISED MAY 1986
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 77001
2
description
The ’ALS526 and ’ALS528 are fuse-programmable identity comparators designed for easy programming in
fixed-comparator applications. The ’ALS526 compares a 16-bit data word against a preprogrammed 16-bit data
word while the ’ALS528 compares a 12-bit data word against a preprogrammed 12-bit data word. The P = Q
output will go low when the applied data word (P inputs) matches the preprogrammed data word (Q represents
the preprogrammed data word). Programming is easily accomplished on the bench or with conventional
automatic test equipment. Special equipment such as PROM programmers are not required.
The ’ALS527 is a combination of an 8-bit fuse-programmable comparator and a conventional 4-bit comparator.
For the P = Q output to go low, the applied data word P0 through P7 must match the preprogrammed data word
Q0 through Q7, and the applied data word P8 through P11 must match the applied data word Q8 through Q11.
The SN54ALS526, SN54ALS527, and SN54ALS528 are characterized for operation over the full military
temperature range of 55
°C to 125°C. The SN74ALS526, SN74ALS527, and SN74ALS528 are characterized
for operation from 0
°C to 70°C.
programming procedure
Before any fuses are blown, the inputs will recognize a low logic level. Therefore, only the bits that are to
recognize a high logic level require programming. A fuse is blown by applying 12 volts (VIHH) to the desired P
input and also to the G input. This permanently programs the pin to recognize a high. Only one input pin should
be programmed at a time.
Step 1.
Take G to VIL and apply VIH to all P inputs.
Step 2.
Take desired P input to VIHH, output will be low if the fuse is intact.
Step 3.
Pulse G to VIHH. After G has returned to VIL, the output will be high indicating that the fuse is blown.
Step 4.
Take P input back to VIH. Repeat steps 2 through 4 to program additional inputs.
verification procedure
These devices can be checked to determine which fuses, if any, are blown. Figure 1 shows how verification can
be accomplished during programming.
Step 1.
Take G and all P inputs to VIL. If the output is low, all fuses are intact.
Step 2.
Take all P inputs to VIH. The output should be high except when all fuses are blown. If all fuses are
blown then the output will be low.
Step 3.
Take test input to VIHH, leaving other inputs at VIH. If the output goes low, the fuse is intact. If the
output goes high, the fuse is blown.
Step 4.
Take test input back to VIH. Repeat steps 3 and 4 to test additional inputs.
For the ’ALS527, P8 through P11 inputs must match the Q8 through Q11 inputs.
相关PDF资料 |
PDF描述 |
|---|---|
| SNJ54ALS526FK | ALS SERIES, 16-BIT IDENTITY COMPARATOR, INVERTED OUTPUT, CQCC20 |
| SNJ54ALS527FK | ALS SERIES, 12-BIT IDENTITY COMPARATOR, INVERTED OUTPUT, CQCC20 |
| SNJ54ALS568AFK | ALS SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT BIDIRECTIONAL DECADE COUNTER, CQCC20 |
| SNJ54ALS666FK | ALS SERIES, 8-BIT DRIVER, TRUE OUTPUT, CQCC28 |
| SNJ54ALS667FK | ALS SERIES, 8-BIT DRIVER, INVERTED OUTPUT, CQCC28 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SN74ALS528N | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| SN74ALS533ADW | 功能描述:闭锁 Octal DType Transparent 闭锁 RoHS:否 制造商:Micrel 电路数量:1 逻辑类型:CMOS 逻辑系列:TTL 极性:Non-Inverting 输出线路数量:9 高电平输出电流: 低电平输出电流: 传播延迟时间: 电源电压-最大:12 V 电源电压-最小:5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-16 封装:Reel |
| SN74ALS533ADWE4 | 功能描述:闭锁 Octal DType Transparent 闭锁 RoHS:否 制造商:Micrel 电路数量:1 逻辑类型:CMOS 逻辑系列:TTL 极性:Non-Inverting 输出线路数量:9 高电平输出电流: 低电平输出电流: 传播延迟时间: 电源电压-最大:12 V 电源电压-最小:5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-16 封装:Reel |
| SN74ALS533ADWG4 | 功能描述:闭锁 Octal DType Transparent 闭锁 RoHS:否 制造商:Micrel 电路数量:1 逻辑类型:CMOS 逻辑系列:TTL 极性:Non-Inverting 输出线路数量:9 高电平输出电流: 低电平输出电流: 传播延迟时间: 电源电压-最大:12 V 电源电压-最小:5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-16 封装:Reel |
| SN74ALS533ADWR | 功能描述:闭锁 Octal DType Transparent 闭锁 RoHS:否 制造商:Micrel 电路数量:1 逻辑类型:CMOS 逻辑系列:TTL 极性:Non-Inverting 输出线路数量:9 高电平输出电流: 低电平输出电流: 传播延迟时间: 电源电压-最大:12 V 电源电压-最小:5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-16 封装:Reel |
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