ZLG7289A應連接共陰式數碼管，應用中無需用到的數碼管和鍵盤可以不連接，省去數碼管和對數碼管設置消隱屬性均不會影響鍵盤的使用。使用按鍵電路中須有相應的下拉電阻如R6，阻值為100 kΩ，連接6個按鍵與位選線DIGO～DIG4的5只電阻R1～R5稱為位選電阻。芯片應用中，下拉電阻與位選電阻應遵從一定的比例關系，下拉電阻應大于位選電阻的5倍而小于其50倍，典型值為10倍。圖中位選電阻取值10 kΩ。在不影響顯示的前提下，下拉電阻應盡可能地取較小的值，這樣可以提高鍵盤部分的抗干擾能力。
2.3 其他外圍電路
其他外圍電路如圖1所示，ZLG7289A需要一外接晶體振蕩電路供系統工作。其典型值為f=12 MHz，C=15 pF。ZLG7289A的RESET復位端在一般應用情況下，可以直接和Vcc相連，只有在需要較高可靠性的情況下，才需要連接一外部復位電路或直接由微處理器控制。因為芯片可直接驅動LED碼管顯示，電流較大，且為動態掃描方式。為盡量消除電源噪聲干擾，提高電路抗干擾能力，應用時可在電源的正負極間并人一個100μF的電容。
DNS 5-F3-05634
DNS 5-F3-05839
DNS 5-F3-05843
DNS 5-F3-07403
DNS 5-F3-07404
DNS 5-F3-07438
DNS 5-F3-07444
DNS 5-F3-09563
DNS 5-F3-16562
DNS 5-F3-31157
DNS 5-F3-76845
DNS 5-F3-76846
DNS 5-F4-01588
DNS 5-F4-01597
DNS 5-F4-01703
DNS 5-F4-01725
DNS 5-F4-01725
DNS 5-F4-01744
DNS 5-F4-04086
DNS 5-F4-07868
DNS 5-F4-08343
DNS 5-F4-08344
DNS 5-F4-08346
DNS 5-F4-10154
DNS 5-F4-13280
DNS 5-F4-21488
DNS 5-F4-22290
DNS 5-F4-32341
DNS 5-F4-50190
DNS 5-F4-50745
DNS 5-F4-50747
DNS 5-F4-70262
DNS 5-F4-70263
DNS 5-F4-70481
DNS 5-F4-71229
DNS 5-F4-72089
DNS 5-F4-72243
DNS 5-F4-72366
DNS 5-F4-72846
DNS 5-F4-72960
DNS 5-F4-73175
DNS 5-F4-73546
DNS 5-F4-73989
DNS 5-F4-74878
DNS 5-F4-74879
DNS 5-F4-74880
DNS 5-F4-77139
DNS 5-F4-78404
DNS 5-F4-78405
DNS 5-F4-78406
DNS 5-F4-78407
DNS 5-F4-79340
DNS 5-F4-79341
DNS 5-F4-90106
DNS 5-F4-90456
DNS 5-F4-95031
DNS 5-J4-17466
DNS 5-R4-13578
DNS 5-V6-00010
DNS 50-6K-T
DNS 500.500.80
DNS 5000-MM-H20
DNS 52-314340-02
DNS 54601408
DNS 54602614
DNS 566015
DNS 60A
DNS 7-39-00153
DNS 7-39-00196
DNS 7-39-00346
DNS 7-39-00516
DNS 7-39-00824
DNS 7-39-01148
DNS 7-39-01223
DNS 7-39-01305
DNS 7-39-01310
DNS 7-39-01428
DNS 7-39-02424
DNS 7-39-02798
DNS 7-39-02815
DNS 7-39-02928
DNS 7-39-03023
DNS 7-39-03092
DNS 7-39-03103
DNS 7-39-03335
DNS 7-39-03351
DNS 7-39-03407
DNS 7-39-03579
DNS 7-39-03665
DNS 7-39-03783
DNS 7-39-03905
DNS 7-39-04036
DNS 7-39-04039
DNS 7-39-04044
DNS 7-39-04493
DNS 7-39-04798
DNS 7-39-04949
DNS 7-39-05037
DNS 7-39-05056
DNS 7-39-05057
DNS 7-39-05058
DNS 7-39-05303
DNS 7-39-06032
DNS 7-39-06051
DNS 7-39-06128
DNS 7-39-06270
DNS 7-39-06903
DNS 7-39-06968
DNS 7-39-07131
DNS 7-39-07183
DNS 7-39-07468
DNS 7-39-13043
DNS 7-39-20129
DNS 7-39-20174
DNS 7-39-20508
DNS 7-39-20604
DNS 7-39-22519
DNS 7-39-22805
DNS 7-39-22925
DNS 7-39-22929
DNS 7-39-24093
DNS 7-39-24118
DNS 7-39-24472
DNS 7-39-25971
DNS 7-39-26059
DNS 7-39-26312
DNS 7-39-26474
DNS 7-39-26634
DNS 7-39-27266
DNS 7-39-27283
DNS 7-39-27331
DNS 7-39-27383
DNS 7-39-27417
DNS 7-39-27418
DNS 7-39-27428
DNS 7-39-27437
DNS 7-39-27492
DNS 7-39-27612
DNS 7-39-27616
DNS 7-39-27648
DNS 7-39-27650
DNS 7-39-27785
DNS 7-39-27807
DNS 7-39-27865
DNS 7-39-28511
DNS 7-39-28590
DNS 7-39-28716
DNS 7-39-28719
DNS 7-39-28750
DNS 7-39-28848
DNS 7-39-28852
DNS 7-39-28853
DNS 7-39-29125
DNS 7-39-29148
DNS 7-39-29298
DNS 7-39-30318
DNS 7-39-30347
DNS 7-39-30810
DNS 7-39-30834
DNS 7-39-30855
DNS 7-39-30867
DNS 7-39-31143
DNS 7-39-31256
DNS 7-39-31272
DNS 7-39-31647
DNS 7-39-32218
DNS 7-39-32448
DNS 7-39-32817
DNS 7-39-32922
DNS 7-39-33310
DNS 7-39-33447
DNS 7-39-33728
DNS 7-39-33730
DNS 7-39-33731
DNS 7-39-33748
DNS 7-39-33760
DNS 7-39-33893
DNS 7-39-34342
DNS 7-39-34345
DNS 7-39-34346
DNS 7-39-34358
DNS 7-39-34474
DNS 7-39-40850
DNS 7-39-47196
DNS 7-39-48491
DNS 7-39-50230
DNS 7-39-51275
DNS 7-39-51281
DNS 7-39-51290
DNS 7-39-51721
DNS 7-39-52120
DNS 7-39-52123
DNS 7-39-52127
DNS 7-39-52128
DNS 7-39-52134
DNS 7-39-52136
DNS 7-39-52137
DNS 7-39-52139
DNS 7-39-53648
DNS 7-39-53685
DNS 7-39-54149
DNS 7-39-55908
DNS 7-39-55908*
DNS 7-39-55977
DNS 7-39-56067
DNS 7-39-56608
DNS 7-39-57332
DNS 7-39-57739
DNS 7-39-57740
DNS 7-39-58622
DNS 7-39-58732
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