Part No.

VDD

System Clock

Program Memory

Data Memory

I/O

Timer

Interrupt

LED Driver Output

PFD

Stack

Package

8-bit

RTC

Ext.

Int.

HT48R52A

2.2V~5.5V

400kHz~8MHz or 32768Hz

2Kx14

88x8

8

1

v

1

1

16x16

--

4

44/52QFP

HT48R54A

2.2V~5.5V

400kHz~8MHz or 32768Hz

4Kx15

192x8

8

2

v

1

2

16x16

v

6

44/52QFP

Note: 1. This device is only available in an OTP version          2. The RTC can be used as the system clock giving a typical operating current of 20mA at 3V.          3. The standby current is 1mA at 3V with the RTC still running.