HD404639R

Notes: Permanent damage may occur if these absolute maximum ratings are exceeded. Normal operation must be under the conditions stated in the electrical characteristics tables. If these conditions are exceeded, the LSI may malfunction or its reliability may be affected.
1. Applies to D13 (VPP) of HD407A4639R.
2. The total permissible input current is the total of input currents simultaneously flowing in from all the I/O pins to GND.
3. The total permissible output current is the total of output currents simultaneously flowing out from VCC to all I/O pins.
4. The maximum input current is the maximum current flowing from each I/O pin to GND.
5. Applies to D0D3, and R0RC.
6. Applies to D4D11 .
7. The maximum output current is the maximum current flowing out from VCC to each I/O pin.
8. Applies to D4D11 and R0RC.
9. Applies to D0D3.

The HD404639R Series is a member of the HMCS400-series microcomputers designed to increase program productivity with large-capacity memory. The HD404639R Series, completely compatible with the HD404639 Series, reduces current dissipation in half and includes a high-speed version. Each microcomputer has a high-precision dual-tone multi frequency (DTMF) generator, four timers, two serial interfaces, voltage comparator, input capture circuit, 32-kHz oscillator for clock, and four low-power dissipation modes.

The HD404639R Series includes 5 chips: the HD404638R and HD40A4638R with 8-kword ROM; the HD404639R and HD40A4639R with 16-kword ROM; the HD407A4639R with 16-kword PROM. HD40A4638R, HD40A4639R, HD407A4639R are high-speed versions (minimum instruction cycle time: 0.5 ms).

The HD404639R is a PROM version ZTATä microcomputer. A program can be written to the PROM by a PROM writer, which can dramatically shorten system development periods and smooth the process from debugging to mass production. (The ZTATä version is 27256-compatible.)ZTATTM : Zero Turn Around Time. ZTAT is a trademark of Hitachi Ltd.