參數(shù)資料
型號(hào): 74HC297
廠商: NXP Semiconductors N.V.
英文描述: Digital phase-locked-loop filter
中文描述: 數(shù)字鎖相環(huán)回路濾波器
文件頁(yè)數(shù): 4/12頁(yè)
文件大?。?/td> 101K
代理商: 74HC297
September 1993
4
Philips Semiconductors
Product specification
Digital phase-locked-loop filter
74HC/HCT297
PIN DESCRIPTION
PIN NO.
SYMBOL
NAME AND FUNCTION
2, 1, 15, 14
3
4
5
6
7
8
9, 10, 13
11
12
16
A, B, C, D
EN
CTR
K
CP
I/D
CP
D/U
I/D
OUT
GND
φ
A
1
,
φ
B,
φ
A
2
XORPD
OUT
ECPD
OUT
V
CC
modulo control inputs
K-counter enable input
K-counter clock input (LOW-to-HIGH, edge-triggered)
increment/decrement clock input (HIGH-to-LOW, edge-triggered)
down/up control
increment/decrement bus output
ground (0 V)
phase inputs
EXCLUSIVE-OR phase detector output
edge-controlled phase detector output
positive supply voltage
Fig.1 Pin configuration.
Fig.2 Logic symbol.
Fig.3 IEC logic symbol.
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