74HC297 Datasheet, PDF (10/12 Pages) NXP Semiconductors – Digital phase-locked-loop filter

Philips Semiconductors
Digital phase-locked-loop filter
Product specification
74HC/HCT297
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard/bus driver
I_CC category: MSI
Note to HCT types
The value of additional quiescent supply current (∆I_CC) for
a unit load of 1 is given in the family specifications.
To determine ∆I_CC per input, multiply this value by the unit
load coefficient shown in the table below.
INPUT
EN_CTR, D/U
A, B, C, D, K_CP, φA₂
I/D_CP, φA₁, φB
UNIT LOAD COEFFICIENT
0.3
0.6
1.5
AC CHARACTERISTICS FOR 74HCT
GND = 0 V, t_r = t_f = 6 ns; C_L = 50 pF
T_amb (°C)
TEST CONDITIONS
SYMBOL PARAMETER
74HCT
+25
−40 to +85
−40 to +125
UNIT
V_CC
(V)
WAVEFORMS
min. typ. max. min. max. min. max.
t_PHL/ t_PLH
t_PHL/ t_PLH
t_PHL/ t_PLH
t_THL/ t_TLH
t_THL/ t_TLH
propagation delay
I/D_CP to I/D_OUT
propagation delay
φA₁, φB to XORPD_OUT
propagation delay
φB, φA₂ to ECPD_OUT
output transition time
bus driver output
I/D_OUT (pin 7)
output transition time
standard outputs
XORPD_OUT, ECPD_OUT
(pins 11, 12)
21 35
16 32
22 44
5 12
7 15
t_W
clock pulse width
K_CP
16 8
t_W
clock pulse width
I/D_CP
25 13
t_su
set-up time
24 13
D/U, EN_CTR to K_CP
t_h
hold time
0 −8
D/U, EN_CTR to K_CP
f_max
maximum clock pulse
30 62
frequency K_CP
f_max
maximum clock pulse
20 36
frequency I/D_CP
44
40
55
15
19
20
31
30
0
24
16
53
48
66
18
22
24
38
36
0
20
13
ns 4.5 Fig.11
ns 4.5 Fig.12
ns 4.5 Fig.13
ns 4.5 Fig.11
ns 4.5 Figs 12 and 13
ns 4.5 Fig.14
ns 4.5 Fig.11
ns 4.5 Fig.14
ns 4.5 Fig.14
MHz 4.5 Fig.14
MHz 4.5 Fig.11
September 1993
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