CD74HCT4543 Datasheet, PDF (5/10 Pages) Texas Instruments – BCD-TO-7 SEGMENT LATCH/DECODER/DRIVER

CD74HCT4543
BCD-TO-7 SEGMENT LATCH/DECODER/DRIVER
HCT INPUT LOADING TABLE
INPUT
UNIT LOADS^†
D0, D1, D2
1
D3, BI
0.5
PH
1.25
LD
1.5
† _{Unit Load is ∆ICC limit specified in electrical}
characteristics table, e.g., 360 µA maximum
at 25°C.
SCHS281A – REVISED MAY 2003
timing requirements over recommended operating free-air temperature range V_CC = 4.5 V (unless
otherwise noted) (see Figure 1)
tw
Pulse duration, LD high
tsu
Setup time, BCD inputs before LD↓
th
Hold time, BCD inputs before LD↓
TA = 25°C
MIN MAX
10
12
8
TA = –55°C
TO 125°C
MIN MAX
15
18
12
TA = –40°C
TO 85°C
MIN MAX
13
15
10
UNIT
ns
ns
ns
switching characteristics over recommended operating free-air temperature range (unless
otherwise noted) (see Figure 2)
FROM
PARAMETER _(INPUT)
Dn
LD
tpd
BI
PH
tt
TO
LOAD
(OUTPUT) CAPACITANCE ^VCC
Output
Output
Output
Output
Any
CL = 50 pF
CL = 15 pF
CL = 50 pF
CL = 15 pF
CL = 50 pF
CL = 15 pF
CL = 50 pF
CL = 15 pF
CL = 50 pF
4.5 V
5V
4.5 V
5V
4.5 V
5V
4.5 V
5V
4.5 V
TA = 25°C
MIN TYP MAX
80
33
77
32
66
27
66
27
50
TA = –55°C
TO 125°C
MIN MAX
120
116
99
99
75
TA = –40°C
TO 85°C
MIN MAX
100
96
83
83
63
UNIT
ns
ns
operating characteristics, V_CC = 5 V, T_A = 25°C
PARAMETER
Cpd^‡ Power dissipation capacitance
‡ _{Cpd is used to determine the dynamic power consumption, per package.}
PD = Cpd VCC2 fi + ∑ CL VCC2 fo
where: fi = input frequency
fo = output frequency
CL = output load capacitance
VCC = supply voltage
TYP UNIT
54 pF
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
5