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HT1381

更新时间: 2024-01-07 19:14:31
品牌 Logo 应用领域
台湾合泰/盛群 - HOLTEK 时钟
页数 文件大小 规格书
10页 185K
描述
Serial Timekeeper Chip

HT1381 技术参数

生命周期:Active包装说明:SOP, SOP8,.25
Reach Compliance Code:unknown风险等级:5.63
商用集成电路类型:CONSUMER CIRCUITJESD-30 代码:R-PDSO-G8
长度:4.9 mm功能数量:1
端子数量:8最高工作温度:85 °C
最低工作温度:-40 °C封装主体材料:PLASTIC
封装代码:SOP封装等效代码:SOP8,.25
封装形状:RECTANGULAR封装形式:SMALL OUTLINE
座面最大高度:1.75 mm最大供电电压 (Vsup):5.5 V
最小供电电压 (Vsup):2 V表面贴装:YES
温度等级:INDUSTRIAL端子形式:GULL WING
端子节距:1.27 mm端子位置:DUAL
宽度:3.9 mmBase Number Matches:1

HT1381 数据手册

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HT1380/HT1381  
Serial Timekeeper Chip  
Features  
·
·
Operating voltage: 2.0V~5.5V  
Maximum input serial clock: 500kHz at  
DD=2V, 2MHz at VDD=5V  
·
Two data transmission modes: single-byte,  
or burst mode  
Serial I/O transmission  
V
·
·
·
·
·
Operating current: less than 400nA at 2V,  
less than 1.2mA at 5V  
TTL compatible  
All registers store BCD format  
HT1380: 8-pin DIP package  
HT1381: 8-pin SOP package  
-
VIH: 2.0V~VDD+0.3V at VDD=5V  
VIL: -0.3V~+0.8V at VDD=5V  
-
Applications  
·
Microcomputer serial clock  
·
Clock and Calendar  
General Description  
The HT1380/HT1381 is a serial timekeeper IC  
which provides seconds, minutes, hours, day,  
date, month and year information. The number  
of days in each month and leap years are auto-  
matically adjusted. The HT1380/HT1381 is de-  
signed for low power consumption and can  
operate in two modes: one is the 12-hour mode  
with an AM/PM indicator, the other is the  
24-hour mode.  
The HT1380/HT1381 has several registers to  
store the corresponding information with 8-bit  
data format. A 32768Hz crystal is required to  
provide the correct timing. In order to minimize  
the pin number, the HT1380/HT1381 use a se-  
rial I/O transmission method to interface with a  
microprocessor. Only three wires are required:  
(1) REST, (2) SCLK and (3) I/O. Data can be de-  
livered 1 byte at a time or in a burst of up to 8  
bytes.  
Block Diagram  
Pin Assignment  
N
C
1
2
3
4
V
S
I
R
D
C
D
N
C
1
2
3
4
V
S
I
R
D
C
D
8
7
6
5
8
7
6
5
D
a
t
a
S
h
i
f
R
t
e
a
l
T
i
m
e
I
/
O
X
X
1
2
X
X
1
2
L
K
L
K
R
e
g
i
s
t
e
r
C
l
o
c
k
S
C
L
K
/
O
/
O
V
S
S
V
S
S
E
S
T
E
S
T
O
s
c
i
l
l
a
t
o
r
a
n
d
H
T
1
3
8
0
H
T
1
3
8
1
C
o
m
m
a
n
d
X
X
1
2
R
E
S
T
D
i
v
c
i
d
e
r
C
o
n
t
r
o
l
L
o
g
i
8
D
I
P
8
S
O
P
C
i
r
c
u
i
t
1
October 2, 1999  

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