Part No.
VDD Program
Memory
Data
Memory I/O Timer
Int.
A/D
PWM
Stack
Package Types
HT46R46
HT46C46
2.2V~
5.5V
1K
´
14
64
´
8
13
8-bit
´
1
3
8-bit
´
4
8-bit
´
1
4
16NSOP, 18DIP/SOP,
20SSOP
HT46R47
HT46C47
2.2V~
5.5V
2K
´
14
64
´
8
13
8-bit
´
1
3
9-bit
´
4
8-bit
´
1
6
16NSOP, 18DIP/SOP,
20SSOP
HT46R48A
HT46C48A
2.2V~
5.5V
2K
´
14
88
´
8
19
8-bit
´
1
3
9-bit
´
4
8-bit
´
1
6
20DIP/SOP,
24SKDIP/SOP/SSOP
HT46R49
2.2V~
5.5V
4K
´
15
128
´
8
23
8-bit
´
1
3
9-bit
´
4
8-bit
´
2
6
20DIP/SOP,
24/28SKDIP/SOP
Note:
Part numbers including
²
C
²
are mask version devices,
²
R
²
are OTP devices.
For devices that exist in two package formats, the table reflects the situation for the larger package.
Block Diagram
Note:
This block diagram represents the OTP devices, for the mask devices there is no Device Programming
Circuitry.
HT46R46/C46/R47/C47/R48A/C48A/R49
Rev. 1.41
2
December 30, 2008
T i m i n g
G e n e r a t o r
S y s t e m R C /
X ' t a l O s c i l l a t o r
I n s t r u c t i o n
D e c o d e r
I n s t r u c t i o n
R e g i s t e r
W D T
O s c i l l a t o r
D a t a
M e m o r y
A
dd
re
ss
D
ec
od
er
M e m o r y
P o i n t e r
M U X
A C C
L o o k - u p
T a b l e
R e g i s t e r
R e s e t &
L V R
C o n f i g .
R e g i s t e r
T i m e r /
C o u n t e r
C o n f i g .
R e g i s t e r
I n t e r r u p t
C i r c u i t
C o n f i g .
R e g i s t e r
I / O
P o r t s
D e v i c e
P r o g r a m m i n g
C i r c u i t r y
C o n f i g u r a t i o n
O p t i o n
P r o g r a m
M e m o r y
A
dd
re
ss
D
ec
od
er
S t a c k
S t a c k P o i n t e r
P r o g r a m
C o u n t e r
L o o k - u p
T a b l e
P o i n t e r
T o P r o g r a m
M e m o r y
A L U
S h i f t e r
M
U
X
C o n f i g .
R e g i s t e r P W M
P F D
A / D
C o n v e r t e r
Device Types
Devices which have the letter
²
R
²
within their part number, indicate that they are OTP devices offering the advantages
of easy and effective program updates, using the Holtek range of development and programming tools. These devices
provide the designer with the means for fast and low-cost product development cycles. Devices which have the letter
²
C
²
within their part number indicate that they are mask version devices. These devices offer a complementary device
for applications that are at a mature state in their design process and have high volume and low cost demands.
Fully pin and functionally compatible with their OTP sister devices, the mask version devices provide the ideal substi-
tute for products which have gone beyond their development cycle and are facing cost-down demands.
In this datasheet, for convenience, when describing device functions, only the OTP types are mentioned by name,
however the same described functions also apply to the Mask type devices.
Selection Table
Most features are common to all devices, the main feature distinguishing them are Program Memory capacity, I/O
count, A/D resolution, stack capacity and package types. The following table summarises the main features of each de-
vice.
