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参数资料
| 型号： | M54HC4518 |
| 厂商： | 意法半导体 |
| 元件分类： | 通用总线功能 |
| 英文描述： | Dual Decade Counter(双十进制计数器) |
| 中文描述： | 双十年计数器（双十进制计数器） |
| 文件页数： | 1/13页 |
| 文件大小： | 270K |
| 代理商： | M54HC4518 |
M54/M74HC4518
M54/M74HC4520
March 1993
HC4520 DUAL 4 BIT BINARY COUNTER
HC4518 DUAL DECADE COUNTER
B1R
(Plastic Package)
ORDER CODES :
M54HCXXXXF1R
M74HCXXXXB1R
M74HCXXXXM1R
M74HCXXXXC1R
F1R
(CeramicPackage)
M1R
(MicroPackage)
C1R
(Chip Carrier)
PIN CONNECTIONS
(top view)
NC =
No Internal
Connection
DESCRIPTION
The M54/74HC4518/4520 are high speed CMOS
DUAL 4 BIT BINARY COUNTERS fabricated in sili-
con gate C
2
MOS technology. Theyhave the same
high speed performance of LSTTL combined with
true CMOS low power consumption.
They consists of two identical internally syn-
chronous 4-stage counters. The counter stages are
D-type flip-flops having interchangeable Clock and
ENABLE inputs for incrementing on either theposi-
tive-going or negative-going transition.
Forsingle-unit operation theENABLE input ismain-
tained ”high” and the counter advances on each
positive-going
transition of the CLOCK. The
counters are cleared by high levels on their clear
lines. The counter can be cascaded in the ripple
mode by connecting Q4 to the enable input of the
subsequentcounterwhiletheclockinput ofthelatter
is heldpermanently low.
All inputs are equipped with protection circuits
against static discharge and transient excess volt-
age.
.
HIGH SPEED
f
MAX
= 55 MHz (TYP.) at V
CC
= 5 V
.
LOWPOWER DISSIPATION
I
CC
= 4
μ
A(MAX.) AT T
A
= 25
°
C
.
HIGH NOISE IMMUNITY
V
NIH
= V
NIL
= 28 % V
CC
(MIN.)
.
OUTPUT DRIVE CAPABILITY
10 LSTTL LOADS
.
SYMMETRICAL OUTPUT IMPEDANCE
|I
OH
| = I
OL
= 4 mA (MIN.)
.
BALANCEDPROPAGATION DELAYS
t
PLH
= t
PHL
.
WIDE OPERATING VOLTAGE RANGE
V
CC
(OPR) = 2 V TO6 V
.
PIN AND FUNCTION COMPATIBLE WITH
4520B/4518B
1/13
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M54HC4518B1R | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:HC4518 DUAL DECADE COUNTER HC4520 DUAL 4 BIT BINARY COUNTER |
| M54HC4518C1R | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:HC4518 DUAL DECADE COUNTER HC4520 DUAL 4 BIT BINARY COUNTER |
| M54HC4518F1R | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:HC4518 DUAL DECADE COUNTER HC4520 DUAL 4 BIT BINARY COUNTER |
| M54HC4518M1R | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:HC4518 DUAL DECADE COUNTER HC4520 DUAL 4 BIT BINARY COUNTER |
| M54HC4520 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:HC4518 DUAL DECADE COUNTER HC4520 DUAL 4 BIT BINARY COUNTER |
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