82C54_05 Datasheet, PDF (17/22 Pages) Intersil Corporation – CMOS Programmable Intervel Timer

82C54
Timing Waveforms (Continued)
WR
CLK
GATE
OUT
MODE
COUNT
(SEE NOTE)
(17)
tPWH
(19)
tR
tWC (28)
(18)
tPWL
(16)
tCLK
tGS
(23)
(24)
tGH
tF (20)
(22)
tGL
(21)
tGW
(23)
tGS
tCL (30)
tGH (24)
tOD (25)
(27)
tWO
tODG (26)
NOTE: LAST BYTE OF COUNT BEING WRITTEN
FIGURE 20. CLOCK AND GATE
Burn-In Circuits
Q1
Q2
VCC
GND
F9
F10
F11
F12
F0
A
Q6
GND
R1
1
R1
2
R1
3
R1
4
R1
5
R1
6
R1
7
R1
8
R2
9
10
R1
11
12
MD82C54 (CERDIP)
V_CC
C1
24
R1
23
R1
22
R1
21
R1
20
R1
19
R2
18
Q3
VCC
GND
Q5
Q4
F2
17
R1
16
15 ^R2
R1
14
A
A
Q8
F1
Q7
13
A
V_CC
R3
R4
R1
GND
R1
F9
R1
F10
R1
F11
R1
F12
R2
F0
OPEN
MR82C54 (CLCC)
VCC
C1
VCC Q2 Q1 OPEN
R1 R1 R1
Q3 VCC
R1 R1
4 3 2 1 28 27 26
5
25
6
24
7
23
8
22
9
21
10
20
11
19
12 13 14 15 16 17 18
R5 R1
R5 R1 R2
OPEN
R1
GND
R1
Q5
R1
Q4
R2
F2
R5
VCC/2
R1
Q8
VCC/2 Q6 GND VCC/2Q7 F1
OPEN
NOTES:
1. V_CC = 5.5V ± 0.5V
2. GND = 0V
3. VIH = 4.5V ±10%
4. VIL = -0.2V to 0.4V
5. R1 = 47kΩ ±5%
6. R2 = 1.0kΩ ±5%
7. R3 = 2.7kΩ ±5%
8. R4 = 1.8kΩ ±5%
9. R5 = 1.2kΩ ±5%
10. C1 = 0.01µF Min
11. F0 = 100kHz ±10%
12. F1 = F0/2, F2 = F1/2, ...F12 = F11/2
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