933406770653
更新时间：2024-09-18 14:20:47
品牌：NXP
描述：IC 4000/14000/40000 SERIES, ASYN NEGATIVE EDGE TRIGGERED 24-BIT UP BINARY COUNTER, PDSO16, PLASTIC, SOT-109-1, SO-16, Counter
概述
规格参数
数据手册933406770653 概述
IC 4000/14000/40000 SERIES, ASYN NEGATIVE EDGE TRIGGERED 24-BIT UP BINARY COUNTER, PDSO16, PLASTIC, SOT-109-1, SO-16, Counter 计数器
933406770653 规格参数
| 是否无铅： | 不含铅 | 是否Rohs认证： | 符合 |
| 生命周期： | Transferred | 零件包装代码： | SOIC |
| 包装说明： | PLASTIC, SOT-109-1, SO-16 | 针数： | 16 |
| Reach Compliance Code： | unknown | HTS代码： | 8542.39.00.01 |
| 风险等级： | 5.07 | 计数方向： | UP |
| 系列： | 4000/14000/40000 | JESD-30 代码： | R-PDSO-G16 |
| JESD-609代码： | e4 | 长度： | 9.9 mm |
| 负载/预设输入： | YES | 逻辑集成电路类型： | BINARY COUNTER |
| 工作模式： | ASYNCHRONOUS | 湿度敏感等级： | 1 |
| 位数： | 24 | 功能数量： | 1 |
| 端子数量： | 16 | 封装主体材料： | PLASTIC/EPOXY |
| 封装代码： | SOP | 封装形状： | RECTANGULAR |
| 封装形式： | SMALL OUTLINE | 峰值回流温度（摄氏度）： | 260 |
| 传播延迟（tpd）： | 1900 ns | 认证状态： | Not Qualified |
| 座面最大高度： | 1.75 mm | 标称供电电压 (Vsup)： | 5 V |
| 表面贴装： | YES | 技术： | CMOS |
| 端子面层： | NICKEL PALLADIUM GOLD | 端子形式： | GULL WING |
| 端子节距： | 1.27 mm | 端子位置： | DUAL |
| 处于峰值回流温度下的最长时间： | 30 | 触发器类型： | NEGATIVE EDGE |
| 宽度： | 3.9 mm | 最小 fmax： | 17 MHz |
| Base Number Matches： | 1 |
933406770653 数据手册
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DATA SHEET
For a complete data sheet, please also download:
• The IC04 LOCMOS HE4000B Logic
Family Specifications HEF, HEC
• The IC04 LOCMOS HE4000B Logic
Package Outlines/Information HEF, HEC
HEF4521B
MSI
24-stage frequency divider and
oscillator
January 1995
Product specification
File under Integrated Circuits, IC04
Philips Semiconductors
Product specification
HEF4521B
MSI
24-stage frequency divider and oscillator
operation as a crystal oscillator is enabled by connecting
external resistors to pins 3 (VSS’) and 5 (VDD’).
DESCRIPTION
The HEF4521B consists of a chain of 24 toggle flip-flops
with an overriding asynchronous master reset input (MR),
and an input circuit that allows three modes of operation.
The single inverting stage (I2/O2) will function as a crystal
oscillator, or in combination with I1 as an RC oscillator, or
as an input buffer for an external oscillator. Low-power
Each flip-flop divides the frequency of the previous flip-flop
by two, consequently the HEF4521B will count up to
224 = 16777216. The counting advances on the HIGH to
LOW transition of the clock (I2). The outputs of the last
seven stages are available for additional flexibility.
Fig.1 Functional diagram.
FAMILY DATA, IDD LIMITS category MSI
See Family Specifications
January 1995
2
Philips Semiconductors
Product specification
HEF4521B
MSI
24-stage frequency divider and oscillator
COUNT CAPACITY
OUTPUT
COUNT CAPACITY
218 = 262 144
219 = 524 288
220 = 1 048 576
221 = 2 097 152
222 = 4 194 304
223 = 8 388 608
224 = 16 777 216
O18
O19
O20
O21
O22
O23
O24
Fig.2 Pinning diagram.
HEF4521BP(N): 16-lead DIL; plastic (SOT38-1)
HEF4521BD(F): 16-lead DIL; ceramic (cerdip) (SOT74)
HEF4521BT(D): 16-lead SO; plastic (SOT109-1)
( ): Package Designator North America
FUNCTIONAL TEST SEQUENCE
CONTROL
TERMINALS
INPUTS
OUTPUTS
REMARKS
MR
I2
O2
VSS
’
VDD
’
O18 to O24
H
L
L
VDD
VSS
L
counter is in three 8-stage sections
in parallel mode; I2 and O2 are
interconnected (O2 is now input);
counter is reset by MR
L
VDD
VSS
H
255 pulses are clocked into I2, O2
(the counter advances on the LOW
to HIGH transition)
L
L
L
L
H
H
L
L
L
VSS
VSS
VSS
VSS
VSS
VDD
H
H
H
VSS’ is connected to VSS
the input I2 is made HIGH
VDD’ is connected to VDD; O2 is
now made floating and becomes an
output; the device is now in the
224 mode
counter ripples from an all HIGH
state to an all LOW state
L
VSS
VDD
L
A test function has been included for the reduction of the
test time required to exercise all 24 counter stages. This
test function divides the counter into three 8-stage
sections by connecting VSS’ to VDD and VDD’ to VSS. Via
I2 (connected to O2) 255 counts are loaded into each of
the 8-stage sections in parallel. All flip-flops are now at a
HIGH state.
The counter is now returned to the normal 24-stage in
series configuration by connecting VSS’ to VSS and VDD’ to
VDD. One more pulse is entered into input I2, which will
cause the counter to ripple from an all HIGH state to an all
LOW state.
January 1995
3
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Fig.3 Logic diagram; for schematic diagram of clock circuit see Fig.4.
Philips Semiconductors
Product specification
HEF4521B
MSI
24-stage frequency divider and oscillator
Fig.4 Schematic diagram of clock input circuitry.
AC CHARACTERISTICS
VSS = 0 V; Tamb = 25 °C; CL = 50 pF; input transition times ≤ 20 ns
VDD
V
TYPICAL
EXTRAPOLATION
FORMULA
SYMBOL
MIN.
TYP. MAX.
Propagation delays
I2 → O18
HIGH to LOW
5
950 1900
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
923 ns
339 ns
212 ns
923 ns
339 ns
212 ns
13 ns
4 ns
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
(0,55 ns/pF) CL
(0,23 ns/pF) CL
(0,16 ns/pF) CL
(0,55 ns/pF) CL
(0,23 ns/pF) CL
(0,16 ns/pF) CL
(0,55 ns/pF) CL
(0,23 ns/pF) CL
(0,16 ns/pF) CL
(0,55 ns/pF) CL
(0,23 ns/pF) CL
(0,16 ns/pF) CL
(0,55 ns/pF) CL
(0,23 ns/pF) CL
(0,16 ns/pF) CL
(0,55 ns/pF) CL
(0,23 ns/pF) CL
(0,16 ns/pF) CL
(0,55 ns/pF) CL
(0,23 ns/pF) CL
(0,16 ns/pF) CL
10
15
5
tPHL
tPLH
tPHL
tPLH
tPHL
tPHL
tPLH
350
220
700
440
950 1900
LOW to HIGH
10
15
5
350
220
40
15
10
40
15
10
120
55
40
90
35
25
60
30
20
700
440
80
On → On + 1
HIGH to LOW
10
15
5
30
20
2 ns
80
13 ns
4 ns
LOW to HIGH
10
15
5
30
20
2 ns
MR → On
240
110
80
93 ns
44 ns
32 ns
63 ns
24 ns
17 ns
33 ns
19 ns
12 ns
HIGH to LOW
10
15
5
I1 → O1
180
70
HIGH to LOW
10
15
5
50
120
60
LOW to HIGH
January 1995
10
15
40
5
Philips Semiconductors
Product specification
HEF4521B
MSI
24-stage frequency divider and oscillator
VDD
V
TYPICAL
EXTRAPOLATION
FORMULA
SYMBOL
MIN.
TYP. MAX.
Output transition times
HIGH to LOW
5
60
30
20
60
30
20
120
60
ns
ns
ns
ns
ns
ns
10 ns
9 ns
6 ns
10 ns
9 ns
6 ns
+
+
+
+
+
+
(1,0 ns/pF) CL
(0,42 ns/pF) CL
(0,28 ns/pF) CL
(1,0 ns/pF) CL
(0,42 ns/pF) CL
(0,28 ns/pF) CL
10
15
5
tTHL
40
120
60
LOW to HIGH
10
15
tTLH
40
AC CHARACTERISTICS
VSS = 0 V; Tamb = 25 °C; CL = 50 pF; input transition times ≤ 20 ns
VDD
V
SYMBOL MIN. TYP. MAX.
Minimum I2 pulse
5
80
40
30
70
40
30
20
15
15
6
40
20
15
35
20
15
−10
−5
0
ns
width; HIGH
10
15
5
tWI2H
tWMRH
tRMR
fmax
ns
ns
Minimum MR
ns
see also waveforms
Fig.5
pulse width; HIGH
10
15
5
ns
ns
Recovery time
for MR
ns
10
15
5
ns
ns
Maximum clock
pulse frequency
12
25
35
MHz
MHz
MHz
10
15
12
17
VDD
V
TYPICAL FORMULA FOR P (µW)
2
Dynamic power
dissipation per
package (P)
5
1 200 fi + ∑ (foCL) × VDD
where
2
10
15
5 100 fi + ∑ (foCL) × VDD
fi = input freq. (MHz)
2
13 050 fi + ∑ (foCL) × VDD
fo = output freq. (MHz)
CL = load capacitance (pF)
∑ (foCL) = sum of outputs
V
DD = supply voltage (V)
January 1995
6
Philips Semiconductors
Product specification
HEF4521B
MSI
24-stage frequency divider and oscillator
Fig.5 Waveforms showing minimum pulse widths for MR and I2, recovery time for MR.
January 1995
7
Philips Semiconductors
Product specification
HEF4521B
MSI
24-stage frequency divider and oscillator
APPLICATION INFORMATION
(1) Optional for low power operation.
Fig.6 Crystal oscillator circuit.
Typical characteristics for crystal oscillator circuit (Fig.6):
500 kHz
CIRCUIT
50 kHz
CIRCUIT
UNIT
Crystal characteristics
resonance frequency
500
S
50
N
kHz
−
crystal cut
equivalent resistance; RS
1
6,2
kΩ
External resistor/capacitor values
Ro
CT
CS
47
82
20
750
82
kΩ
pF
pF
20
January 1995
8
Philips Semiconductors
Product specification
HEF4521B
MSI
24-stage frequency divider and oscillator
Fig.7 RC oscillator circuit;
1
------------------------------------
2,3 × RTC × C
f ≈
; RS ≥ 2 RTC, in which:
f in Hz, R in Ω, C in F.
VIL max
(maximum input voltage LOW)
(input leakage current)
-----------------
RS + RTC
<
ILI
RTC; C = 1 nF; RS ≈ 2 RTC
C; RTC = 56 kΩ; RS = 120 kΩ
Fig.8 Oscillator frequency as a
function of RTC and C;
VDD = 10 V; test circuit is
Fig.7.
January 1995
9
Philips Semiconductors
Product specification
HEF4521B
MSI
24-stage frequency divider and oscillator
Fig.9 Test set-up for measuring forward transconductance gfs = dio/dvi at vo is constant (see also graph Fig.10).
A: average,
B: average + 2 s,
C: average − 2 s, in which: ‘s’ is the observed standard deviation.
Fig.10 Typical forward transconductance gfs as a function of the supply voltage at Tamb = 25 °C.
January 1995
10
Philips Semiconductors
Product specification
HEF4521B
MSI
24-stage frequency divider and oscillator
Fig.11 Voltage gain VO/VI as a function of supply
voltage.
Fig.12 Supply current as a function of supply
voltage.
Fig.13 Test set-up for measuring graphs of Figs 11 and 12.
January 1995
11
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