参数资料
| 型号： | ISL3035EIRUZ-T |
| 厂商： | Intersil |
| 文件页数： | 15/16页 |
| 文件大小： | 0K |
| 描述： | IC LEVEL TRANSLATOR 6CH 16TQFN |
| 标准包装： | 3,000 |
| 逻辑功能： | 变换器，双向 |
| 位数： | 5 |
| 输入类型： | 逻辑 |
| 输出类型： | 逻辑 |
| 数据速率： | 100Mbps |
| 通道数： | 1 |
| 输出/通道数目： | 5 |
| 差分 - 输入:输出： | 无/无 |
| 电源电压： | 2.2 V ~ 3.6 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 16-UFQFN |
| 供应商设备封装： | 16-UTQFN（2.6x1.8） |
| 包装： | 带卷 (TR) |
8
FN6492.0
March 31, 2009
Application Information
Overview
The ISL3034E, ISL3035E, ISL3036E are 100Mbps,
bi-directional voltage level translating ICs for multi-supply
voltage systems. These products shift lower voltage levels
on one interface side (supplied by VL) to a higher voltage
level on the other interface side (supplied by VCC), or vice
versa. VOH of the I/OVL pins tracks the VL supply, while VOH
of the I/OVCC pins tracks the VCC supply.
These ICs feature bit-by-bit auto-direction sensing to
increase flexibility, and to eliminate the need for direction
control pins. On chip pull-up current sources in the active
mode, and pull-up resistors in SHDN mode, eliminate the
need for most external bus resistors. Drivers interfacing with
these level translators may be open-drain or push-pull types,
and all three versions may also be used for unidirectional
level shifting.
The three versions share the same architecture, but the
ISL3034E is a general purpose 6-Channel version, while the
6-Channel ISL3035E specifically targets SD Card and other
memory card applications. The 4-channel ISL3036 targets
nibble and byte based applications, as well as 4-wire SPI
interfaces. Power supply ranges allow level shifting between
1.5V, 1.8V, and 2.5V powered devices on the VL side to
2.5V, and 3.3V devices on the VCC side.
Principles of Operation
When enabled, these level shifters detect transitions on an
I/O pin, and drive the appropriate logic level on the
corresponding I/O pin on the other “side”. If the transition
was low-to-high, the channel shifts the voltage up to VCC (for
transitions on an I/OVL pin) or down to VL (for transitions on
an I/OVCC pin), and then drives the shifted level on the other
side. The ISL3035E enables whenever VCC > VL + 200mV,
while the ISL3034E and ISL3036E enable if EN = 1 AND
VCC > VL + 200mV.
Upon detecting a transition on either I/O pin, that channel’s
accelerator circuitry actively drives the opposite side’s
(output) pin to GND or the output’s supply rail, and then turns
off. Weak hold circuitry then maintains the logic state until
the input is 3-stated, or until another active transition occurs
on either I/O pin for that channel. Figure 5 shows the
simplified block diagram of one level shifting channel. The
accelerator circuitry comprises high and low threshold
detectors, one shots with level shifters and large output
drivers. A transition on one of the I/OVL or I/OVCC pins
momentarily defines that pin as an input. When the high or
low threshold is crossed, a one-shot fires either the PMOS or
NMOS driver, respectively, on the opposite side (effectively
the output). These drivers are large enough to quickly drive
the output node to its respective supply or to GND. Note that
this transition on the “output” trips the transition detector on
that pin, firing its accelerator, which feeds back to the “input”
to help reinforce slow transitions, such as those from an
open-drain type driver. Once the one-shot - and thus the
accelerator - times out (approximately 3ns to 4ns), the large
output drivers tri-state and the pins are weakly held in the
last state by the small NMOS transistor between I/OVL and
I/OVCC (for a low) or by the small current sources (for a
high). In this static state, the I/O pins are easily overdriven by
the next transition from an external driver. Having large
pull-up and pull-down devices in the accelerator (vs just an
active pull-up) nearly eliminates the concern about the
external driver’s output impedance, and that impedance’s
effect on VOL, fall times and data rate.
The weak pull-up current sources on each I/O pin and the
NMOS pass transistors, remain ON whenever the IC is
enabled. If a channel’s external driver tri-states, the weak
pull-up currents either keep the I/O pins high, or if the last
state was a low the current sources pull the I/O pins high. In
the latter case, each channel’s accelerators will once again
fire when either the I/OVL or the I/OVCC voltage crosses the
accelerator’s high threshold level.
Auto Direction Sensing
Each level translator channel independently and
automatically determines the direction of data transfer
without any external control signals. As described earlier, a
transition on either of the channel’s I/O pins momentarily
defines that pin as an input, which then translates and drives
that input signal to the channel’s corresponding pin on the
other port (now the output). After a brief period of active
driving, both I/O pins return to their weak “hold” mode, where
the next transition on either I/O pin determines the direction
for the next transfer.
Auto sensing saves valuable processor GPIO pins (three
[CLK, CMD, DAT] for SD Card applications, or six for the
general purpose hex case), and simplifies the software
associated with the peripheral interface.
Using Open Drain Drivers
These level translators’ accelerator based architecture
works equally well when driven by push-pull or open drain
type drivers (e.g., for the CMD line initialization in MMC
FIGURE 5. ONE CHANNEL SIMPLIFIED SCHEMATIC
I/OVL
I/OVCC
VCC
VL
EN
HIGH VTH
DETECT
LOW VTH
DETECT
VCC
HIGH VTH
DETECT
LOW VTH
DETECT
#
# ONE-SHOT AND LEVEL SHIFTER
ISL3034E, ISL3035E, ISL3036E
相关PDF资料 |
PDF描述 |
|---|---|
| ICS552ARI-01 | IC OSC/MULT/BUFFER OCT 20-SSOP |
| MS27468T13B8BA | CONN HSG RCPT 8POS JAMNUT SCKT |
| MS3124F24-61S | CONN RCPT 61POS JAM NUT W/SCKT |
| MS27474T22B32PLC | CONN HSG RCPT 32POS JAM NUT PINS |
| MS27497E14B35BB | CONN HSG RCPT 37POS WALL MT SCKT |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL3036E | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:4-Channel And 6-Channel High Speed, Auto-direction Sensing Logic Level Translators |
| ISL3036EIRUZ-T | 功能描述:IC LEVEL TRANSLATOR 4CH 16TQFN RoHS:是 类别:集成电路 (IC) >> 逻辑 - 变换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:100 系列:- 逻辑功能:变换器，双向 位数:2 输入类型:CMOS 输出类型:CMOS 数据速率:16Mbps 通道数:2 输出/通道数目:1 差分 - 输入:输出:无/无 传输延迟（最大）:15ns 电源电压:1.65 V ~ 5.5 V 工作温度:-40°C ~ 85°C 封装/外壳:10-UFQFN 供应商设备封装:10-UTQFN（1.4x1.8） 包装:管件 |
| ISL3036EIRUZ-T7A | 功能描述:转换 - 电压电平 QD LVL SHIFTER ESD 1 6LD 2 6X1 8MM IND RoHS:否 制造商:Micrel 类型:CML/LVDS/LVPECL to LVCMOS/LVTTL 传播延迟时间:1.9 ns 电源电流:14 mA 电源电压-最大:3.6 V 电源电压-最小:3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:MLF-8 |
| ISL3036EIRZ-T | 功能描述:IC LEVEL TRANSLATOR 4CH 14-TQFN RoHS:是 类别:集成电路 (IC) >> 逻辑 - 变换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:100 系列:- 逻辑功能:变换器，双向 位数:2 输入类型:CMOS 输出类型:CMOS 数据速率:16Mbps 通道数:2 输出/通道数目:1 差分 - 输入:输出:无/无 传输延迟（最大）:15ns 电源电压:1.65 V ~ 5.5 V 工作温度:-40°C ~ 85°C 封装/外壳:10-UFQFN 供应商设备封装:10-UTQFN（1.4x1.8） 包装:管件 |
| ISL3036EIRZ-T7A | 功能描述:转换 - 电压电平 QD LVL SHIFTER ESD 1 4LD 3 5X3 5MM IND W RoHS:否 制造商:Micrel 类型:CML/LVDS/LVPECL to LVCMOS/LVTTL 传播延迟时间:1.9 ns 电源电流:14 mA 电源电压-最大:3.6 V 电源电压-最小:3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:MLF-8 |
发布紧急采购，3分钟左右您将得到回复。