CD4508BNSR屬于集成電路（IC）的鎖存器。由美國(guó)德州儀器公司制造生產(chǎn)的CD4508BNSR鎖存器鎖存器是類(lèi)似于觸發(fā)器的基本數(shù)字存儲(chǔ)設(shè)備，但是不同之處在于，在鎖存使能（或類(lèi)似命名）信號(hào)處于有效邏輯狀態(tài)的任何時(shí)間，保持的邏輯狀態(tài)都可以改變。“透明”鎖存器還允許設(shè)備輸出在鎖存使能信號(hào)有效時(shí)反映輸入的當(dāng)前狀態(tài)，而相反的是，狀態(tài)僅在保持狀態(tài)已固定時(shí)改變。

Features:

? Two independent 4-bit latches

? Individual master reset for each 4-bit latch

? 3.state outputs with high-impedance state for bus

line applications

= Medium-speed operation: tp = tp 4 = 70 ns

{typ.) at Vpp = 10 Vand C_= 50 pF

? 100% tested for quiescent current at 20 V

? 5-V, 10-V, and 16-V parametric ratings

= Standardized, symmetrical output characteristics

? Maximum input current of 1 yA at 18 V

over full package-temperature range;

100 nA at 18 V and 26°C

= Noise margin (full package-temperature

range) =

1VatVpp= 5V

2VatVpp=10V

25VatVpp=15V

? Meets all requirements of JEDEC Tenta-

tive Standard No. 13B,Standard Speci-

fications for Description of ‘B’ Series

CMOS Devices”