W78LE51 Datasheet, PDF (13/21 Pages) Winbond – 8-BIT MTP MICROCONTROLLER

Preliminary W78LE51
DC Characteristics, continued
PARAMETER
Sink Current
P0, ALE, PSEN
Output High Voltage
P1, P2, P3, P4
Output High Voltage
P0, ALE, PSEN [*2]
Source Current
P1, P2, P3, P4
Source Current
P0, ALE, PSEN
SYM.
ISK2
VOH1
VOH2
ISR1
ISR2
SPECIFICATION
MIN.
MAX.
8
16
4.5
9
2.4
-
1.4
-
2.4
-
1.4
-
-100
-20
-8
-1.9
-250
-50
-14
-3.8
UNIT
TEST CONDITIONS
mA VDD = 4.5V, Vin = 0.45V
mA VDD = 2.4V, Vin = 0.45V
V VDD = 4.5V, IOH = -100 µA
V VDD = 2.4V, IOH = -8 µA
V VDD = 4.5V, IOH = -400 µA
V VDD = 2.4V, IOH = -200 µA
µA VDD = 4.5V, Vin = 2.4V
µA VDD = 2.4V, Vin = 1.4V
mA VDD = 4.5V, Vin = 2.4V
mA VDD = 2.4V, Vin = 1.4V
Notes:
*1. RST pin is a Schmitt trigger input.
*2. P0, ALE and /PSEN are tested in the external access mode.
*3. XTAL1 is a CMOS input.
*4. Pins of P1, P2, P3, P4 can source a transition current when they are being externally driven from 1 to 0.
AC CHARACTERISTICS
The AC specifications are a function of the particular process used to manufacture the part, the
ratings of the I/O buffers, the capacitive load, and the internal routing capacitance. Most of the
specifications can be expressed in terms of multiple input clock periods (TCP), and actual parts will
usually experience less than a ±20 nS variation. The numbers below represent the performance
expected from a 0.6micron CMOS process when using 2 and 4 mA output buffers.
Clock Input Waveform
XTAL1
T_CH
T_CL
F OP, TCP
PARAMETER
Operating Speed
Clock Period
Clock High
Clock Low
SYMBOL
FOP
TCP
TCH
TCL
MIN.
0
25
10
10
Notes:
1. The clock may be stopped indefinitely in either state.
2. The TCP specification is used as a reference in other specifications.
3. There are no duty cycle requirements on the XTAL1 input.
- 13 -
TYP.
-
-
-
-
MAX.
24
-
-
-
UNIT
MHz
nS
nS
nS
NOTES
1
2
3
3
Publication Release Date: December 1998
Revision A1