Features: *3.3V~5V CMOS Compatible Input *Maximum Clock Frequency: 25MHz (Cascade Operation) *Maximum Output Voltage: 17V *Package: DIP24, SOP24, SSOP24, QFN32 *Package and Pin Layout: Pin layout and functionality are similar to those of the ST2221C. (Each characteristic value is different.) *...
DM135B: Features: *3.3V~5V CMOS Compatible Input *Maximum Clock Frequency: 25MHz (Cascade Operation) *Maximum Output Voltage: 17V *Package: DIP24, SOP24, SSOP24, QFN32 *Package and Pin Layout: Pin layout ...
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| CHARACTERISTIC | SYMBOL | RATING | UNIT |
| Supply Voltage | VDD | 0 ~ 7.0 | V |
| Input Voltage | VIN | -0.4 ~ VDD+0.4 | V |
| Output Current | IOUT | 90 ( DM134B ) | mA |
| 60 ( DM135B ) | |||
| Output Voltage | VOUT | -0.3 ~ 17 | V |
| Clock Frequency | fCLK | 25 | MHz |
| GND Terminal Current | IGND | 1440 ( DM134B ) | mA |
| 960 ( DM135B ) | |||
| Power Dissipation (On 4-layer PCB) |
PD | 2.5 (DIP-24 : Ta=25) | W |
| 1.58 (SOP-24 : Ta=25) | |||
| 1.39 (SSOP-24 : Ta=25) | |||
| 3.08 (QFN-32 : Ta=25) | |||
| Thermal Resistance (On 4-layer PCB) |
Rth(j-a) | 50.0 (DIP-24) | /W |
| 79.2 (SOP-24) | |||
| 90.2 (SSOP-24) | |||
| 40.6 (QFN-32) | |||
| Operating Temperature | Topr | -40 ~ 85 | |
| Storage Temperature | Tstg | -55 ~ 150 |
The DM134B,DM135B are constant current drivers specifically designed for LED display applications. The value of constant current can be varied using an external resistor. The DM134B,DM135B include a 16-bit shift register, latches, and constant current drivers on a single Silicon CMOS chip.